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Abstract This study describes and illustrates the biodiversity of macroinvertebrates associated to Sargassum and Dictyota seaweed habitats in the Alcatrazes archipelago, the largest Marine Protected Area (MPA) in the state of São Paulo, southeast Brazil. Assemblages were sampled during the summers of 2018, 2019 and 2020 and winter of 2018 at two sites on the main island. Macroalgae containing the associated fauna were collected at approximately 10 meters deep, with six samples at each site and in each sampling campaign. Sargassum fronds prevailed during summer collections, whilst were absent in the winter campaigns, when Dictyota was the most frequent seaweed. Among invertebrates, 32 species were exclusively found on summer months, associated to Sargassum beds, while 12 species were only registered on winter collection, in association with Dictyota. In total, 91 species were identified, belonging to 60 families, 19 orders, 7 classes and 3 phyla, including Arthropoda (Malacostraca and Pycnogonida), Mollusca (Gastropoda, Bivalvia and Polyplacophora), and Echinodermata (Ophiuroidea and Echinoidea). Among the 91 species found, 73 species are new records for the Alcatrazes archipelago marine area, thus revealing the expressive invertebrate biodiversity living in association with macroalgae beds in that area, which has still been little explored. No significant difference in species diversity was found between the two sites of Alcatrazes. In addition, few specimens of two invasive species were found: Perna perna (Mollusca: Bivalvia) and Ophiothela mirabilis (Echinodermata: Ophiuroidea), which underscores the importance of monitoring different habitats within MPAs to check for possible changes in the fauna over the years. As far as our knowledge, this is the first illustrated inventory of the seaweed-associated macroinvertebrate fauna within the Alcatrazes Archipelago, one of the largest MPAs in the Brazilian coast; besides unravelling its notorious biodiversity, this can act as a reference for future monitoring of local coastal diversity. MPA (MPA Paulo Brazil 201 202 island 1 deep campaign collections campaigns invertebrates months collection total 9 identified 6 families orders phyla Malacostraca Pycnogonida, Pycnogonida , Pycnogonida) Gastropoda, Gastropoda (Gastropoda Polyplacophora, Polyplacophora Polyplacophora) Ophiuroidea Echinoidea. Echinoidea . Echinoidea) area explored addition (Mollusca (Echinodermata Ophiuroidea, Ophiuroidea) years knowledge seaweedassociated Archipelago coast 20 2

Resumo Este estudo descreve e ilustra a biodiversidade de macroinvertebrados associados a habitats de macroalgas pardas marinhas dos gêneros Sargassum e Dictyota no Arquipélago de Alcatrazes, a maior Área Marinha Protegida (AMP) do estado de São Paulo, sudeste do Brasil. As assembleias foram amostradas durante os verões de 2018, 2019 e 2020 e no inverno de 2018 em dois locais na ilha principal. As macroalgas contendo a fauna associada foram coletadas a aproximadamente 10 metros de profundidade, com seis amostras em cada local e em cada campanha amostral. Frondes de Sargassum predominaram nas coletas de verão, enquanto estiveram ausentes nas campanhas de inverno, quando Dictyota foram predominantes. Entre os invertebrados, 32 espécies foram encontradas exclusivamente nos meses de verão, associadas aos bancos de Sargassum, enquanto 12 espécies foram registradas apenas na coleta de inverno, em associação com Dictyota. No total, foram identificadas 91 espécies, pertencentes a 60 famílias, 19 ordens, 7 classes e 3 filos, incluindo Arthropoda (Malacostraca e Pycnogonida), Mollusca (Gastropoda, Bivalvia e Polyplacophora) e Echinodermata (Ophiuroidea e Echinoidea). Das 91 espécies encontradas, 73 espécies são novos registos para a área marinha do arquipélago de Alcatrazes, revelando assim a expressiva biodiversidade de invertebrados que vivem em associação com bancos de macroalgas naquela área ainda pouco explorada. Nenhuma diferença significativa de diversidade de espécies foi encontrada entre os dois locais de Alcatrazes. Além disso, foram encontrados poucos exemplares de duas espécies invasoras: Perna perna (Mollusca: Bivalvia) e Ophiothela mirabilis (Echinodermata: Ophiuroidea), o que ressalta a importância do monitoramento de diferentes habitats dentro das AMPs para verificar possíveis alterações na fauna ao longo dos anos. Até onde sabemos, este é o primeiro inventário ilustrado da fauna de macroinvertebrados associados a algas marinhas no Arquipélago de Alcatrazes, uma das maiores AMPs da costa brasileira; além de desvendar a sua notória biodiversidade, pode servir de referência para futuro monitoramento da diversidade costeira local. Alcatrazes AMP (AMP Paulo Brasil 201 202 principal 1 profundidade amostral verão predominantes total 9 6 famílias ordens filos Malacostraca Pycnogonida, Pycnogonida , Pycnogonida) Gastropoda, Gastropoda (Gastropoda Polyplacophora Ophiuroidea Echinoidea. Echinoidea . Echinoidea) explorada disso invasoras (Mollusca (Echinodermata Ophiuroidea, Ophiuroidea) anos sabemos brasileira 20 2

https://doi.org/10.1590/1676-0611-bn-2024-1610

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Vicente, Vanessa Silva

; Longo, Pedro Augusto dos Santos

; Mansur, Karine Ferreira Ribeiro

; Serrano, Helena

; Batistão, Alan Rodrigo

; Leite, Fosca Pedini Pereira

Biota Neotropica

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2024, Volumen 24 Nº 2 elocation e20241610

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

https://doi.org/10.1590/1676-0611-bn-2024-1610

Primer registro formal del quitón incubador Calloplax vivipara (Polyplacophora: Callistoplacidae) en Perú
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Cardoso, Franz

; Vargas, Miguel

Revista Peruana de Biología

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Ene 2023, Volumen 30 Nº 1 elocation e23822

Resumen: En Es | Texto: En Es | PDF: En | PDF: Es

Abstract Calloplax vivipara (Plate, 1899) is formal recorded for the first time in the southern Peruvian coast. Four specimens were found in rocky intertidal environment under blocks of stones in Islay, Arequipa, in December 2013 and October 2019. A female of 9.2 mm body length collected in the spring of 2013 presented six juveniles in the external part of the insertion zone of the ctenidia in the pallial groove, constituting the first case of an incubating chiton in Peru.

Resumen Calloplax vivipara (Plate, 1899) se registra formalmente por primera vez en el litoral sur peruano. Cuatro ejemplares fueron encontrados en el intermareal pedregoso debajo de bloques de piedras en Islay, Arequipa, en diciembre de 2013 y octubre de 2019. Una hembra de 9.2 mm de longitud del cuerpo colectada en la primavera del 2013 presentó seis juveniles en la parte externa de la zona de inserción de los ctenidios en el surco paleal, constituyendo el primer caso de un quitón incubador en Perú.

https://doi.org/10.15381/rpb.v30i1.23822

New records of teratology in Chiton cumingsii and Chiton granosus (Mollusca: Polyplacophora) from the Peruvian coast Mollusca (Mollusca Polyplacophora
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Cardich-Becerra, Luz

; Mendivil, Alejandro

; Cardoso, Franz

Papéis Avulsos de Zoologia

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2023, Volumen 63 elocation e202363036

Resumen: En | Texto: En | PDF: En

Abstract This paper presents the first teratological records for Peruvian waters of Chiton cumingsii Frembly, 1827 and Chiton granosus Frembly, 1827, both species very common in the Southeast Pacific. We found five abnormal individuals in C. cumingsii, and two in C. granosus, including the first recorded splitting abnormalities for these species. An individual of C. cumingsii with a new insertion plate in the tail valve was also observed. We observed that splitting abnormalities in Polyplacophora can be classified as perfect or imperfect, depending on whether the splitted valves are clearly recognized as individual fragments or not. Coalescence between the splitted valves seems to be a common phenomenon, and this coalescence can be homogeneous or heterogeneous. As both species show a combination of hypomerism, coalescence and splitting, we suggest that they are probably interrelated and represent an attempt of the developmental mechanisms of chitons to overcome a valve malformation. Frembly 182 Pacific C imperfect not phenomenon heterogeneous hypomerism malformation 18 1

https://doi.org/10.11606/1807-0205/2023.63.036

How many species of Mollusca are there in Brazil? A collective taxonomic effort to reveal this still unknown diversity Brazil
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Machado, Fabrizio M.

; Miranda, Marcel S.

; Salvador, Rodrigo B.

; Pimenta, Alexandre D.

; Côrtes, Mariana O.

; Gomes, Jaime A.J.

; Miyahira, Igor C.

; Agudo-Padrón, Ignacio

; Oliveira, Cléo D.C.

; Caetano, Carlos H.S.

; Coelho, Paulo R.S.

; D’Ávila, Sthefane

; Arruda, Eliane P. de

; Almeida, Sérgio M. de

; Gomes, Suzete R.

; Alvim, Juliana

; Galvão-Filho, Hilton

; L. Ferreira-Júnior, Augusto

; Marques, Rodrigo C.

; Martins, Inês

; Souza, Leonardo S. de

; Arruda, Janine O.

; Cavallari, Daniel C.

; Santos, Sonia B. dos

; Pedro, Natan C.

; Salles, Anna C. de A.

; Dornellas, Ana P.S.

; Lima, Tarcilla C. de

; Amaral, Vanessa S. do

; Silva, Fernanda S.

; Passos, Flávio D.

; Thiengo, Silvana S.

; Leite, Tatiana S.

; Simone, Luiz R.L.

Zoologia (Curitiba)

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2023, Volumen 40 elocation e23026

Resumen: En | Texto: En | PDF: En

ABSTRACT The expression ‘you need to know to conserve’ is a well-known cliche among biologists. Documenting the richness of a group of organisms is the first step towards understanding biodiversity and preparing efficient conservation plans. In this context, many efforts have been made to quantify the number of species on Earth and estimate the number of species still unknown to science. A few countries have complete and integrated databases estimating the approximate number of species recorded for their territory, particularly in the Global South. In Brazil, a country of continental dimensions, revealing the richness of the second most diverse clade of invertebrates (=Mollusca) has been a goal of taxonomists. Recently, in an unprecedented, collective, and integrated effort among Brazilian malacologists, it was possible to estimate how many valid species of molluscs are there in Brazil. In this effort, more than 30 mollusc experts joined together to update the Taxonomic Catalogue of the Brazilian Fauna (TCBF), a governmental website that allows a quick and real-time updating of all Metazoan. So far, more than 5,000 updates have been made in TCBF, indicating the presence of 3,552 valid species of molluscs in Brazil, distributed among the main clades as follows: Caudofoveata (10 spp.), Solenogastres (6 spp.), Polyplacophora (35 spp.), Scaphopoda (43 spp.), Cephalopoda (92 spp.), Bivalvia (629 spp.) and Gastropoda (2,737 spp.). The present study, in addition to demonstrating for the first time the richness of Brazilian molluscs, also presents the state of the art of this important phylum of invertebrates highlighting its most representative and neglected groups. you conserve wellknown well known biologists plans context science territory South Brazil dimensions =Mollusca Mollusca (=Mollusca taxonomists Recently unprecedented collective malacologists 3 TCBF , (TCBF) realtime real Metazoan far 5000 5 000 5,00 3552 552 3,55 follows 10 (1 spp., spp spp. 6 ( 35 (3 43 (4 92 (9 629 (62 2,737 2737 2 737 (2,73 spp.. . study groups (TCBF 500 00 5,0 355 55 3,5 1 4 9 62 2,73 273 73 (2,7 50 0 5, 3, 2,7 27 7 (2, 2, (2

https://doi.org/10.1590/s1984-4689.v40.e23026

Mollusc collections at South African institutions: Development and current status
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Cole, Mary

South African Journal of Science

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Ago 2021, Volumen 117 Nº 7-8 Paginas 1 - 9

Resumen: En | Texto: En | PDF: En

There are three major mollusc collections in South Africa and seven smaller, thematic collections. The KwaZulu-Natal Museum holds one of the largest collections in the southern hemisphere. Its strengths are marine molluscs of southern Africa and the southwestern Indian Ocean, and terrestrial molluscs of South Africa. Research on marine molluscs has led to revisionary papers across a wide range of gastropod families. The Iziko South African Museum contains the most comprehensive collections of Cephalopoda (octopus, squid and relatives) and Polyplacophora (chitons) for southern Africa. The East London Museum is a provincial museum of the Eastern Cape. Recent research focuses on terrestrial molluscs and the collection is growing to address the gap in knowledge of this element of biodiversity. Mollusc collections in South Africa date to about 1900 and are an invaluable resource of morphological and genetic diversity, with associated spatial and temporal data. The South African National Biodiversity Institute is encouraging discovery and documentation to address gaps in knowledge, particularly of invertebrates. Museums are supported with grants for surveys, systematic studies and data mobilisation. The Department of Science and Innovation is investing in collections as irreplaceable research infrastructure through the Natural Science Collections Facility, whereby 16 institutions, including those holding mollusc collections, are assisted to achieve common targets and coordinated outputs.SIGNIFICANCE: • Mollusc collections are among the oldest natural science collections in South Africa, dating from just before 1900. They provide an invaluable resource of morphological and genetic diversity, with associated spatial and temporal data. They are spread across the country in three comprehensive and seven smaller, thematic collections and this paper puts together available information about these scattered and diverse collections. Each has its own strengths and specialisations, and together they cater to a variety of the country's identified research priorities. Although staff complements are small, mollusc collections are well curated and conserved, expanding, actively researched and associated data are available online or on request.

https://doi.org/10.17159/sajs.2021/8984 23 descargas

Reproductive aspects of Chiton virgulatus in Bahía de La Paz, Gulf of California, Mexico
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Vélez-Arellano, Nurenskaya

; García-Domínguez, Federico Andrés

; Holguin-Quiñones, Oscar Efraín

; Obeso-Nieblas, Maclovio

Revista de biología marina y oceanografía

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Ago 2020, Volumen 55 Nº 1 Paginas 1 - 10

Resumen: En Es | Texto: En Es | PDF: En | PDF: Es

Abstract: This study analyzed the reproductive cycle of Chiton virgulatus and its relationship with air temperature (AT) sea and surface temperature (SST), photoperiod, and tidal cycle (TC) in Bahía de La Paz, in the coast of the Gulf of California. Monthly samples were collected from September 2008 to September 2009. The parameters recorded included total length, total weight, and gonad weight of each organism; the gonad was processed using a histological technique, and the gonadal index and length at first maturity (L50) were estimated. C. virgulatus displays partial spawning with a reproductive peak in summer and autumn (July to December). The frequency of ripe organisms was associated with rises in SST (30.6 ºC), AT (29.9 ºC), and TC (68 cm, high tidal), while photoperiod (longer days) regulated the frequency of developing organisms. The length at first maturity was 29.7 mm. Chiton virgulatus is a polyplacophoran species in which high temperatures and high tides influence reproductive timing, while an increase in daylight boosts gonad development.

Resumen: Se analizó el ciclo reproductivo de Chiton virgulatus y su relación con la temperatura superficial del mar y aire (TSM, TA), el fotoperiodo y el ciclo de mareas (CM) en Bahía de La Paz en la costa del Golfo de California. Se tomaron muestras mensuales de septiembre de 2008 a septiembre de 2009. Se registró la longitud, el peso total y peso de la gónada de cada organismo, la gónada fue procesada usando una técnica histológica, se estimó el índice gonádico y la longitud de primera madurez (L50). C. virgulatus presenta desoves parciales con un pico reproductivo en verano y otoño (julio-diciembre). La frecuencia de organismos maduros estuvo asociada con los aumentos de TSM (30,6 ºC), TA (29,9 ºC) y CM (68 cm, pleamar), mientras que el fotoperiodo (días más largos) moduló la frecuencia de organismos en desarrollo. La longitud de primera madurez fue de 29,7 mm. Chiton virgulatus es un poliplacóforo al que las altas temperaturas y el nivel de marea alto, influyen en el momento reproductivo, mientras que un aumento en la luz del día favorece el desarrollo gonádico.

https://doi.org/10.22370/rbmo.2020.55.1.2351 278 descargas

Benthic macrofauna, at Class level, in a tropical seagrass meadow exposed to open-sea: relation with environmental variables
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Ocampo-Alvarez, Héctor

; García-Pacheco, Romeo

; Romo-Curiel, Alfonsina Eugenia

; Becerril-Espinosa, Amayaly

; Gallegos-Martínez, Margarita Elizabeth

Hidrobiológica

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Abr 2020, Volumen 30 Nº 1 Paginas 1 - 12

Resumen: En Es | Texto: En Es | PDF: En | PDF: Es

ABSTRACT Background: Seagrass meadows are highly productive marine ecosystems that harbor dense and diverse benthic macrofauna communities. These, seagrass ecosystems are being drastically decimated worldwide, which, in turn, affects the density and diversity of the associated macrofauna. Goals: We investigated if the benthic macrofaunal community structure in a tropical seagrass meadow exposed to the open sea is related to the gradient of environmental and biological factors generated by the distance from the coast. Methods: The study was conducted in the seagrass meadow from Los Petenes Biosphere Reserve. Biological samples and environmental variables were obtained by triplicate at twelve sampling sites divided into three transects located at 0.5, 9.0, and 17.0 km from the coast. Results: Benthic macrofaunal density varied from 933 to 2550 indv. m-2. The collected specimens belonged to ten taxonomic classes: Asteroidea, Bivalvia, Echinoidea, Gastropoda, Holothuroidea, Malacostraca, Ophiuroidea, Polychaeta, Polyplacophora, and Sipunculidea. Taxonomic composition from far from the coast transects was homogeneous within transects but different between transects. Taxonomic composition of near to the coast transect was heterogeneous, mainly influenced by the low diversity of classes from the site closest to the Campeche city. Conclusions: In this tropical seagrass meadow, the composition of the benthic macrofauna is mainly modulated by a set of environmental variables that gradually change from the coast to the open sea: Thalassia testudinum biomass, algae biomass, depth, and phosphate levels in sediment. In contrast, the maximum density of the benthic macrofauna is limited to an optimal biomass of the dominant seagrass species T. testudinum. This relationship is not lineal, but it follows a Log-Normal distribution pattern.

RESUMEN Antecedentes: Las praderas de pastos marinos son ecosistemas altamente productivos que albergan comunidades densas y diversas de macrofauna bentónica. Estos ecosistemas están siendo diezmados drásticamente a nivel mundial, afectando la densidad y diversidad de su macrofauna bentónica. Objetivo: Se investigó si la estructura de la comunidad de macrofauna bentónica, de una pradera marina tropical expuesta a mar abierto, está relacionada con el gradiente de variables ambientales y biológicas generado por la distancia de la costa. Métodos: El estudio se realizó en la pradera de pastos marinos de la Reserva de la Biosfera Los Petenes. Las muestras biológicas y las variables ambientales fueron obtenidas por triplicado en 12 sitios, en tres transectos localizados a 0.5, 9.0 y 17.0 km desde la costa. Resultados: La densidad de la macrofauna bentónica varió de 933 a 2550 ind. m-2. Los ejemplares recolectados pertenecieron a 10 clases taxonómicas: Asteroidea, Bivalvia, Echinoidea, Gastropoda, Holoturoidea, Malacostraca, Ophiuroidea, Polychaeta, Polyplacophora y Sipunculidea. La composición taxonómica en los transectos alejados de la costa fue homogénea dentro de transectos, pero diferente entre transectos. La composición del transecto cercano a la costa fue heterogenea, principalmente influenciada por la baja diversidad del sitio cercano a la ciudad de Campeche. Conclusiones: En esta pradera marina tropical, la composición de la macrofauna bentónica está modulada principalmente por un set de variables ambientales que cambian gradualmente desde la costa hacia mar abierto: biomasa del pasto marino Thalassia testudinum, biomasa de algas, profundidad y concentración de fosfato en el sedimento. En contraste, la densidad máxima de la macrofauna bentónica está limitada a una biomasa óptima del pasto marino dominante T. testudinum. Esta relación no es lineal, sino que se ajusta a una distribución Log Normal.

https://doi.org/10.24275/uam/izt/dcbs/hidro/2020v30n1/ocampo 67 descargas

Taxonomic and functional diversity of mollusk assemblages in a tropical rocky intertidal zone
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Souza, Shayanna M. A. da R.

; Matthews-Cascon, Helena

; Couto, Erminda da C. G.

Iheringia. Série Zoologia

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2020, Volumen 110 elocation e2020027

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO Nós investigamos a variação espacial das assembleias de moluscos em função de diferentes habitats formados por fauna séssil e substrato rochoso em uma zona entre marés rochosa no nordeste do Brasil. O substrato da zona entre marés superior era predominantemente recoberto por cracas [Chthamalus bisinuatus (Pilsbry, 1916)], da zona entre marés média por mexilhões [Brachidontes exustus (Linnaeus, 1758)] e da zona entre marés inferior por macroalgas clorofíceas [Gayralia oxysperma (Kützing) K. L. Vinogradova ex Scagel et al., 1989 and Ulva lactuca Linnaeus, 1753], feofíceas [Sargassum vulgare C. Agardh, 1820] e rodofíceas [Palisada flagellifera (J. Agardh) K. W. Nam, 2007]. Foram registrados 3861 moluscos pertecentes às classes Gastropoda (9 espécies; 3800 indivíduos), Bivalvia (3 spp.; 54 ind.), e Polyplacophora (1 sp.; 7 ind.). A diversidade funcional foi analisada através da estrutura trófica, na qual identificamos as guildas alimentares: suspensívoros, raspadores, herbívoros e carnívoros. Abundância, riqueza de espécies, diversidade de Shannon, uniformidade de Pielou e diversidade trófica variaram em função dos habitats formados por cracas, mexilhões, algas e substrato rochoso. Habitats formados por algas e mexilhões apresentaram elevada riqueza de espécies e diversidade trófica, entretanto, apresentaram baixa abundância. Ao contrário, o habitat formado por cracas registrou baixa riqueza e diversidade trófica e elevado número de indivíduos. O substrato rochoso apresentou valores baixos em todos os índices investigados. Esse resultado mostra o efeito da modificação ambiental provocada pela fauna séssil nesse sistema. Esses organismos aumentam a complexidade ambiental e viabilizam o estabelecimento de organismos por meio de processos de facilitação. As diferentes guildas alimentares encontradas neste estudo reafirmam o papel dos substratos biológicos no fornecimento de nichos capazes de suportar diferentes padrões de ocupação.

ABSTRACT We investigated the spatial variation of molluscan assemblages with different habitat-forming species and bare rock habitat in a rocky intertidal zone in northeastern Brazil. The high intertidal zone substrate was covered predominantly of barnacles [Chthamalus bisinuatus (Pilsbry, 1916)], the mid-intertidal of mussels [Brachidontes exustus (Linnaeus, 1758)] and the low intertidal of macroalgae chlorophytes [Gayralia oxysperma (Kützing) K. L. Vinogradova ex Scagel et al., 1989 and Ulva lactuca Linnaeus, 1753], phaeophytes [Sargassum vulgare C. Agardh] and rhodophytes [Palisada flagellifera (J.Agardh) K. W. Nam, 2007]. A total of 3,861 mollusks were recorded, belonging to the classes Gastropoda (9 species; 3,800 individuals), Bivalvia (3 spp.; 54 ind.), and Polyplacophora (1 sp.; 7 ind.). Functional diversity was accessed through the trophic structure, in which we identified food guilds: suspension feeders, grazers, herbivores, and carnivores. The analysis revealed significant differences in mollusk abundance, species richness, diversity indices, and trophic diversity among barnacle belts, mussel beds, algae habitat, and bare rock habitats. The highest species richness and trophic diversity were detected in algae habitat and mussel beds, which showed low abundance. In contrast, barnacle belts registered low species richness and trophic diversity and a high number of individuals. Bare rock recorded low values in all surveyed indices. This result points to the effect of environmental modification caused by habitat-forming species in this system. These species increase environmental complexity and enable the establishment of organisms through facilitation processes. The various food guilds found in this study reaffirm the role of habitat-forming species in providing niches that support different occupation patterns.

https://doi.org/10.1590/1678-4766e2020027 732 descargas

10.

First inventory of benthic mollusks associated with the reef ecosystems of Morro de São Paulo on Tinharé Island in northeastern Brazil
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Lima, Silvio Felipe Barbosa

; Lima, Bianca Vieira

; Abreu, Evandro Cosmo

; Oliveira, Geraldo Semer Pomponet

; Lucena, Rudá Amorim

; Mendonça, Luana Marina de Castro

; Prata, Jéssica

; Souza, J. Weverton S. de

Biota Neotropica

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2019, Volumen 19 Nº 4 elocation e20190745

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo: Os ecossistemas recifais do Morro de São Paulo estão na área de proteção ambiental Tinharé-Boipeba, a qual foi estabelecida em 1992 no estado da Bahia, Brasil. Apesar desta área ter sido criada há mais de duas décadas, nenhum estudo foi realizado sobre a biodiversidade de invertebrados associados a tais ecossistemas recifais. Este trabalho representa o primeiro inventário de moluscos bentônicos associados aos ecossistemas recifais do Morro de São Paulo com base na coleta de indivíduos vivos e conchas com superfície íntegra e desgastada. Moluscos foram amostrados em janeiro de 2015 e agosto de 2016 através de busca ativa em habitats das regiões entremarés e sublitoral dos ecossistemas recifais nas três praias do Morro de São Paulo. A riqueza taxonômica e índices de biodiversidade foram analisados. O inventário da malacofauna resultou na identificação de 84 espécies pertencentes a 44 famílias de gastrópodes bem como 13 espécies pertencentes a oito famílias de bivalves e um quiton (total: 98 species). A riqueza de espécies foi numericamente dominada por membros da subclasse Caenogastropoda. As famílias com o maior número de espécies foram Ranellidae (5), Muricidae (6) and Marginellidae (7). Conus regius, Cypraecassis testiculus, Lobatus goliath, Strombus pugilis, Tonna galea, Turbinella laevigata e Vasum cassiforme são macroespécies extremamente vulneráveis na região devido a sua importância comercial. A composição malacofaunística da área estudada foi comparada com a do Arquipélago de Abrolhos. ACE e CHAO 1 estimaram 133 espécies de moluscos para a região. Apesar do rápido levantamento, o número de espécies descobertas na área em questão se aproximou em 73.6% do número total estimado. O considerável número de espécies de moluscos encontradas em uma área relativamente pequena com insuficiente esforço amostral ressalta a importância dos ecossistemas recifais do Morro de São Paulo como uma área prioritária para conservação na costa do estado da Bahia, Brasil, na qual a riqueza de outros grupos de invertebrados é virtualmente desconhecida.

Abstract: The reef ecosystems of Morro de São Paulo are located in the Tinharé-Boipeba Environmental Preservation Area which was established in 1992 in the state of Bahia, Brazil. Despite this area has been created more than two decades ago, no study has provided knowledge on the invertebrate biodiversity associated with such reef ecosystems. The present investigation provides the first inventory of benthic mollusks associated with the reef ecosystems of Morro de São Paulo based on the collection of living specimens and fresh empty as well as some worn shells. Mollusks were sampled in January 2015 and August 2016 through intensive searches from the intertidal to shallow subtidal habitats of the reefs on three beaches of Morro de São Paulo. Taxonomic richness and biodiversity indices were analyzed. This rapid assessment of the malacofauna resulted in the determination of 84 species belonging to 44 families of gastropods as well as 13 species belonging to eight families of bivalves and one chiton (total: 98 species). Species richness was numerically dominated by members of the subclass Caenogastropoda. The families with the largest number of species were Ranellidae (5), Muricidae (6) and Marginellidae (7). Conus regius, Cypraecassis testiculus, Lobatus goliath, Strombus pugilis, Tonna galea, Turbinella laevigata and Vasum cassiforme are extremely vulnerable macrospecies in the region due to their commercial importance. Comparisons of the malacofauna composition between the study site and Abrolhos Bank were made from data published for this region. ACE and CHAO 1 estimated 133 mollusk species for the region. Despite the rapid assessment, the number of species discovered in the study area approached 73.6% of the estimated total number. The considerable number of mollusk species found in a relatively small area with insufficient sampling underscores the importance of the reef ecosystems of Morro de São Paulo as a one priority area for conservation on the coast of the state of Bahia, Brazil, for which the species richness of other invertebrate groups is virtually unknown.

https://doi.org/10.1590/1676-0611-bn-2019-0745 1346 descargas

11.

Molluscs from the Puerto Morelos Reef National Park, Quintana Roo, Mexico; new records for the Mexican Caribbean
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Hernández, Raquel

; Álvarez, Fernando

Revista mexicana de biodiversidad

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2019, Volumen 90 elocation e902712

Resumen: En Es | Texto: En Es | PDF: En | PDF: Es

Abstract A study of the coral reef associated fauna was conducted in the Puerto Morelos Reef National Park (PNAPM) in Quintana Roo, Mexico. Coral rubble was sampled at 3 sites representing different conservation conditions. A total of 653 organisms representing 120 species of molluscs were collected, of which 14 (11%) are new records for the Mexican Caribbean. The new records presented herein correspond to: 11 gastropods belonging to 11 different families, 2 bivalves from 2 different orders, and 1 polyplacophoran. A rarefaction curve adjusted using Chao 1 estimator results in a theoretical maximum of 220 species. With further studieson the mollusc fauna of the Mexican Caribbean, the recorded species richness should increase considerably in the future.

Resumen Se realizó un estudio de la fauna asociada al arrecife de coral en el Parque Nacional Arrecife de Puerto Morelos (PNAPM) en Quintana Roo, México. Se muestreó la pedacería de coral muerto en 3 sitios que representaron diferentes niveles de conservación. Se recolectó un total de 653 organismos que corresponden a 120 especies de moluscos, de los cuales 14 (11%) son registros nuevos para el Caribe mexicano. Los registros nuevos que se presentan son: 11 gasterópodos de 11 familias, 2 bivalvos de 2 órdenes diferentes y 1 poliplacóforo. Se obtuvo una curva de rarefacción utilizando el estimador Chao 1 que resultó en un máximo teórico de 220 especies. Con nuevos estudios sobre la fauna de moluscos del Caribe mexicano, el número de especies registradas debe incrementarse considerablemente en el futuro.

https://doi.org/10.22201/ib.20078706e.2019.90.2712 514 descargas

12.

Diversidad de poliplacóforos tropicales del sur de la Provincia Panameña
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Ibáñez, Christian

; Sellanes, Javier

; Pardo-Gandarillas, M. Cecilia

Latin american journal of aquatic research

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Sep 2016, Volumen 44 Nº 4 Paginas 807 - 814

Resumen: En Es | Texto: En Es | PDF: En | PDF: Es

For the first time a comprehensive record on the diversity of polyplacophorans in the south of the Province of Panama (Ecuador-Peru), corresponding to the Guayaquil ecoregion, was made. Chitons were collected from five locations and their diversity and the similarity of the assemblies were estimated. During winter 2013 and summer 2013-2014 a total of 539 chitons belonging to 11 species were collected. The diversity decreases from north to south due to a strong replacement of species and to the local dominance of some taxa. The ordination analysis suggests two faunal groups, one composed of the locations of Montanita and Santa Rosa form Ecuador, and Bonanza from Peru, while the second is composed of the Peruvian locations of Pocitas and Lobitos. The species that contribute most to the differentiation are Ischnochiton dispar, Acanthopleura echinata and Acanthochitona ferreirai. Polyplacophorans diversity at this part of Province of Panama is poor compared to the greatest number of species reported in Chile, Mexico and Puerto Rico. It is suggested that the type of habitat and environmental food supply would be key in explaining differences in diversity.

Por primera vez se hace un catastro exhaustivo sobre la diversidad de poliplacóforos en la zona sur de la Provincia Panameña (Ecuador-Perú), correspondiente a la ecorregión de Guayaquil. Se recolectaron quitones de cinco localidades y se estimó su diversidad y similitud de los ensambles. Durante invierno de 2013 y verano 2013-2014 se recolectó un total de 539 quitones pertenecientes a 11 especies. La diversidad disminuyó de norte a sur debido a un fuerte recambio de especies y la dominancia local de algunos taxa. El análisis de ordenación sugiere dos grupos faunísticos, uno compuesto por las localidades de Montañita y Santa Rosa en Ecuador, y Bonanza en Perú, y otro compuesto por las localidades peruanas de Pocitas y Lobitos. Las especies que más contribuyen a la diferenciación son Ischnochiton dispar, Acanthopleura echinata y Acanthochitona ferreirai. La diversidad de poliplacóforos en esta parte de la Provincia Panameña es pobre comparada con el mayor número de especies reportadas en Chile, México y Puerto Rico. Se sugiere que el tipo de hábitat y la oferta ambiental de alimento serían factores importantes en las diferencias en diversidad.

https://doi.org/10.3856/vol44-issue4-fulltext-16 2282 descargas

13.

Ensamblaje de quitones (Mollusca: Polyplacophora) en el litoral rocoso del departamento de Córdoba, Caribe colombiano
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Quirós-Rodríguez, Jorge A

; Arias-Ríos, Jorge E

; Campos-Campos, Néstor H

Actualidades Biológicas

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Dic 2015, Volumen 37 Nº 103 Paginas 177 - 184

Resumen: Es En | Texto: Es En | PDF: Es | PDF: En

Entre septiembre de 2006 y junio de 2007 se caracterizó la estructura del ensamblaje de quitones en siete estaciones del litoral rocoso del departamento de Córdoba, Colombia. Para los muestreos se utilizó una cadena, delimitando un área de 25 m² con tres repeticiones dispuestas al azar en cada estación a profundidades iguales o menores a 1 m. Se recolectaron en total 524 ejemplares de cinco especies de las familias Acanthochitonidae, Chitonidae y Ischnochitonidae. El estudio evidencia que la estructura del ensamblaje de quitones en Córdoba, está definida por tres conglomerados de estaciones; el primero, formado por las estaciones 1 y 2 de San Antero, caracterizado por Acanthopleura granulata y Chiton tuberculatus; el segundo, constituido por las estaciones 3, 4, 5 y 6 de Moñitos y Puerto Escondido, reunió a A. granulata, C. marmoratus y C. tuberculatus, mientras que el tercer conglomerado se asoció con la estación 7 de Los Córdobas, destacando a C. marmoratus como la especie dominante. Se incluyen dos nuevos registros para el Caribe cordobés; Acanthochitona spiculosa e Ischnochiton striolatus, las cuales fueron recolectadas en costas de la plataforma rocosa de San Antero, Moñitos y Puerto Escondido..

Between September 2006 and June 2007 the assembly structure of chitons was characterized in seven stations of the rocky coast of Cordoba, Colombia. In samples was used a string defining an area of 25 m² with three replications randomly arranged at each station at depths equal to or less than 1 m. Were collected 524 specimens of five species of the families Acanthochitonidae, Chitonidae, and Ischnochitonidae. The study shows that three clusters of stations define the assembly structure of chitons in Cordoba. The first one formed by station 1 and 3 of San Antero, characterized by the presence of Acanthopleura granulata and Chiton tuberculatus. The second one formed by stations 3, 4, 5 and 6 of Moñitos and Puerto Escondido, gathered A. granulata, C. marmoratus, and C. tuberculatus while the third cluster was associated with station 7 of Los Córdobas, showing C. marmoratus as the dominant specie. It was included two new records for the Caribbean Cordoba; Acanthochitona spiculosa and Ischnochiton striolatus, which were collected from rocky shores of San Antero platform, Moñitos, and Puerto Escondido.

https://doi.org/10.17533/udea.acbi.v37n103a06 2242 descargas

14.

Polyplacophora (Mollusca) from reef ecosystems and associations with macroalgae on the Coast of Alagoas, Northeastern Brazil
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Correia, Monica Dorigo

; Coelho, Catarina Alves

; Sovierzoski, Hilda Helena

Zoologia (Curitiba)

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Ago 2015, Volumen 32 Nº 4 Paginas 289 - 295

Resumen: En | Texto: En | PDF: En

ABSTRACT Brazilian marine molluscs, especially Gastropoda and Bivalvia, are relatively well studied. However, information on the class Polyplacophora is more scarce, particularly on reef-dwelling forms. This study aimed to qualitatively and quantitatively analyze aspects of polyplacophorans from reef ecosystems and their associations with macroalgae on the coast of Maceió (state of Alagoas, Brazilian Northeast). The study area included five coral reefs at Ipioca, Ponta do Prego, Ponta do Meirim, Riacho Doce and Ponta Verde, as well as two sandstone reefs, located in Guaxuma and Sereia. The samples were obtained by snorkelling along the intertidal and subtidal reef zones to a depth of up to five meters during low tides, between 2009 and 2011. In addition, the chitons associated with three macroalgae of the Ponta Verde coral reef were studied based on collections made over 12 years (from the summer of 1998 to the winter of 2009). Three replicates with an area of 25 cm2 were collected from each of the following species of macroalgal phytals: Amphiroa fragilissima (Rhodophyta), Caulerpa racemosa (Chlorophyta) and Dictyota cervicornis (Phaeophyta). A total of 715 individuals (110 juveniles and 605 adults) were identified, including Acanthochitona terezae Guerra, 1983, Ischnochiton striolatus (Gray, 1828) and Ischnoplax pectinata (Sowerby II, 1840). Acanthochitona terezae was found for the first time in the area. Ischnochiton striolatus was the most abundant species in the reef ecosystem and in association with macroalgae. The greatest number of individuals of all three polyplacophorans identified (adults and juveniles) was found on the phytal A. fragilissima.

https://doi.org/10.1590/S1984-46702015000400004 2303 descargas

15.

Lepidochitona pseudoliozonis, una nueva especie de quitón (Polyplacophora: Ischnochitonidae) del norte del Caribe
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García-Ríos, Cedar I

Revista de Biología Tropical

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Jun 2015, Volumen 63 Nº 2 Paginas 369 - 384

Resumen: Es En | Texto: Es En | PDF: Es | PDF: En

El género Lepidochitona (Gray, 1821) agrupa a quitones relativamente pequeños con un cinturón distintivo, por estar cubierto dorsalmente por corpúsculos calcáreos no solapados. Esta representado en el Caribe por cuatro especies: L. liozonis (Dall, & Simpson, 1901), L. rosea Kaas, 1972, L. rufoi García-Ríos, 2010 y L. bullocki García-Ríos, 2011. La inspección de una muestra de ejemplares de los cayos de la Florida permite distinguir ejemplares de lepidoquitones que podrían clasificarse como L. liozonis (la única especie del género informada para la Florida) por no presentar grandes diferencias morfológicas que justifiquen su separación de los de Puerto Rico (localidad del tipo). Sin embargo, la comparación de secuencias del gen mitocondrial que codifica para el citocromo oxidasa I (COI) de los ejemplares de la Florida con ejemplares de L. liozonis de Puerto Rico evidencia una divergencia de 14%. Esta divergencia es incompatible con especies reproductivamente conectadas. Además de sus diferencias genéticas, la nueva especie se puede distinguir de su especie gemela por ser de mayor tamaño, tener espículas marginales más largas y una pendiente posmucronal muy cóncava.

The genus Lepidochitona (Gray 1821) contains relatively small chitons with a distinctive girdle, dorsally clothed with non-overlapping calcareous corpuscles. In the Caribbean, it is represented by four species: L. liozonis (Dall, & Simpson, 1901), L. rosea Kaas, 1972, L. rufoi García-Ríos, 2010 and L. bullocki García-Ríos, 2011. A rutinary morphological inspection of 10 specimens of a Lepidochitona species from the Florida Keys was concordant with L. liozonis (the only species of the genus informed for Florida). They did not show many morphological differences that could justify its separation from the specimens from Puerto Rico (the type locality). However, the comparison of sequences of the mitochondrial gene coding for cytochrome oxidase I (COI) of L. liozonis from Puerto Rico and the Florida specimens showed a divergence of 14%. This divergence is incompatible with a reproductively connected species. In addition to their genetic differences, the new species differs from L. liozonis in having bigger size, longer marginal spicules and a postmucronal slope very concave. Rev. Biol. Trop. 63 (2): 369-384. Epub 2015 June 01.

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