Resumo: Objetivo Buscamos entender como as amebas testáceas se espalham em novos locais, avaliando seu potencial de dispersão pelo vento e por animais em ecossistemas de água doce. Métodos Realizamos um experimento de campo durante 33 dias entre julho e agosto de 2018. O estudo incluiu quatro abordagens diferentes: (i) um grupo controle exposto exclusivamente ao vento, (ii) a adição de propágulos dispersos por Odonata (insetos aquáticos), (iii) a adição de propágulos dispersos por anfíbios, e (iv) a adição combinada de propágulos de ambos os animais. Resultados Detectamos um total de 13 espécies de amebas testáceas. Em termos de riqueza de espécies, observamos um aumento constante ao longo do período experimental. Em termos de abundância, observou-se uma tendência semelhante, com diferenças no tratamento de todos os vectores combinados, quando comparados os tratamentos com somente vento, e da combinação do vento com os vetores de forma isolada, indicando uma possível colonização progressiva destes organismos no novo ambiente aquático. Relativamente à composição das amebas testadas, não foram detectadas diferenças significativas entre tratamentos dentro de cada período ou entre os diferentes tratamentos ao longo da experiência. Conclusões Nossos resultados demonstram a importância dos vetores animais no transporte de cistos de amebas testáceas.

Abstract: Aim We aimed to understand how testaceous amoebae spread in new sites, assessing their dispersal potential by wind and animals in freshwater ecosystems. Methods We conducted a field experiment over 33 days between July and August 2018. The study included four different approaches: (i) a control group exposed exclusively to wind, (ii) the addition of propagules dispersed by Odonata (aquatic insects), (iii) the addition of propagules dispersed by amphibians, and (iv) the combined addition of propagules of both animals. Results We detected a total of 13 species of testate amoebae. Regarding species richness, we observed a steady increase throughout the experimental period. In terms of abundance, a similar trend was observed, with differences in the treatment of all vectors combinated, when comparing the treatments with only wind, and the combination of wind and vectors alone, indicating a possible progressive colonization of these organisms in the new aquatic environment. Regarding the composition of testate amoebae, we did not detect significant differences between treatments within each period or between different treatments throughout the experiment. Conclusions Our results demonstrate the importance of animal vectors in the transport of testate amoebae cysts.

RESUMEN-+ Las macrófitas acuáticas juegan un rol importante en los sistemas lénticos, ya que constituyen el hábitat particular de varios grupos de insectos acuáticos y desempeñan un papel fundamental en la estructuración de sus comunidades. El objetivo de este estudio fue contribuir al conocimiento de la entomofauna acuática asociada las macrófitas en ciénagas de la cuenca media del Río Atrato, Chocó-Colombia. Durante cuatro meses se hicieron colectas de insectos acuáticos asociados a las raíces de diferentes plantas acuáticas, utilizando un cuadrante de un m2, dotado de una malla de 0,5 mm, con tres replicas por ciénaga. Simultáneamente se midieron algunas variables físicas y químicas del agua. La comunidad de insectos acuáticos estuvo compuesta por 6 órdenes, 23 familias y 36 géneros. Los órdenes más representativos fueron Hemiptera (Heteroptera) y Odonata y las familias más abundantes fueron Noteridae (Coleoptera) y Libellulidae (Odonata). El índice de diversidad presentó un rango de entre 2,39 y 2,07 bits/ind, sobresaliendo la ciénaga Plaza Seca, mientras que la dominancia estuvo entre 0,16 y 0,11. El grupo funcional de mayor abundancia fue el de los predadores. Las variables pH, temperatura del agua y transparencia presentaron diferencias significativas entre ciénagas y existieron importantes asociaciones entre la entomofauna acuática y las variables abióticas analizadas.

ABSTRACT Aquatic macrophytes play an important role in lentic systems, since they constitute the particular habitat of several groups of aquatic insects and play a fundamental role in structuring their communities. The objective of this study was to contribute to the knowledge of the aquatic entomofauna associated with macrophytes in wetlands of the middle basin of the Atrato River, Chocó-Colombia. For four months, collections of aquatic insects associated with the roots of different aquatic plants were made, using a quadrat of one m2, equipped with a 0.5 mm mesh, with three replicates per swamp. Simultaneously, some physical and chemical variables of the water were measured. The community of aquatic insects was composed of 6 orders, 23 families, and 36 genera. The most representative orders were Hemiptera (Heteroptera) and Odonata and the most abundant families were Noteridae (Coleoptera) and Libellulidae (Odonata). The diversity index presented a range between 2.39 and 2.07 bits/ind, with Plaza Seca as the most representative wetlands, while the dominance was between 0.16 and 0.11. The most abundant functional group was that of predators. The variables pH, water temperature and transparency presented significant differences between swamps and there were important associations between the aquatic entomofauna, and the abiotic variables analyzed.

Abstract The Cerrado harbors rich biodiversity and yet faces various anthropogenic pressures, an alarming situation that justifies fauna inventory studies, particularly insects, often overlooked in such endeavors. Additionally, many locations within the Cerrado lack information about the odonatofauna, including Conservation Units (CUs), considered the main tools for biodiversity conservation in Brazil. The objective of our study is to report the Odonata community occurring in the Minas Gerais portion of the Parque Nacional Grande Sertão Veredas (PNGSV), the conservation status of species, taxonomic information for some taxa, and compare the Odonata community along wet and dry seasons. The study was conducted from September 2022 to April 2023, with a total of 576 hours of sampling. We collected 601 specimens from 83 species, highlighting two new species (one recently described and other to be described elsewhere), eight new records for the state, and the rediscovery of the species Progomphus geijskesi Needham, 1944, collected for the first time in Brazil since 1918, and Argia botacudo Calvert, 1909, previously known only from the type material. The significant richness sampled, new taxa, new records, and the presence of species at some risk of extinction reinforce the Cerrado's relevance as a global hotspot. It also underscores the importance of CUs as a tool to ensure the protection of Odonata communities in Brazil and highlights the need to strengthen public policies to guarantee investments and foster future financial resources for the protection of Brazilian biota, especially for conducting more inventory studies in the Cerrado.

Resumen El Cerrado alberga una rica biodiversidad y aún enfrenta diversas presiones antropogénicas, una situación alarmante que justifica estudios de inventario de fauna, especialmente de insectos, a menudo pasados por alto en tales esfuerzos. Además, muchos lugares dentro del Cerrado carecen de información sobre la odonatofauna, incluídas las Unidades de Conservación (UC), consideradas las principales herramientas para la conservación de la biodiversidad en Brasil. El objetivo de nuestro estudio es informar sobre la comunidad de odonatos que se encuentra en la porción de Minas Gerais del Parque Nacional Grande Sertão Veredas (PNGSV), el estado de conservación de las especies, información taxonómica para algunos taxones y comparar la comunidad de odonatos durante las estaciones húmeda y seca. El estudio se realizó de septiembre de 2022 a abril de 2023, con un total de 576 horas de muestreo. Recopilamos 601 ejemplares de 83 especies, destacando dos nuevas especies (una recientemente descrita y otra por describirse en otro lugar), ocho nuevos registros para el estado y el redescubrimiento de las especies Progomphus geijskesi Needham, 1944, recolectada por primera vez en Brasil desde 1918, y Argia botacudo Calvert, 1909, conocida anteriormente solo por el material tipo. La riqueza significativa muestreada, los nuevos taxones, los nuevos registros y la presencia de especies en riesgo de extinción refuerzan la relevancia del Cerrado como un hotspot global. También subraya la importancia de las UC como herramienta para garantizar la protección de las comunidades de odonatos en Brasil y destaca la necesidad de fortalecer las políticas públicas para garantizar inversiones y fomentar futuros recursos financieros para la protección de la biota brasileña, especialmente para llevar a cabo más estudios de inventario en el Cerrado.

Abstract A phenomenon of Anax ephippiger (Burmeister, 1839) aggregation on the coast for the Strait of Gibraltar area, southern Iberian Peninsula, was recorded. Likewise, an annotated list of species recorded in Microreserve Arroyo Negro nearby to the Strait of Gibraltar is presented. Most of the species observed are thermophilic. The environmental and climatic conditions of this microreserve favor the settlement of African migratory species in a global warming scenario.

Resumen Se constata un fenómeno de agregación de Anax ephippiger (Burmeister, 1839) en la costa para la zona del estrecho de Gibraltar. Asimismo, se presenta una lista de especies registradas en la Microrreserva Arroyo Negro cercana al estrecho de Gibraltar, al sur de la península ibérica. Las condiciones ambientales y climáticas de esta microrreserva favorecen el asentamiento de especies migratorias africanas en un escenario de calentamiento global.

Resumo Apresentamos uma lista de espécies de Odonata (Insecta) em riachos do município de Araquari, nordeste do estado de Santa Catarina (SC), sul do Brasil. Cinco riachos foram pesquisados semestralmente entre março de 2016 e março de 2018. Ao todo, registramos 18 taxa (16 espécies) de 12 gêneros e quatro famílias. Coenagrionidae e Libellulidae foram as famílias mais ricas em espécies (sete espécies cada; cada família com 43% do total do número de espécies). Idioneura ancilla Selys, 1860, Telagrion longum Selys, 1876 (Coenagrionidae) e Erythrodiplax umbrata (Linnaeus, 1758) (Libellulidae) são registradas pela primeira vez no estado de Santa Catarina. Os padrões de ocorrência das espécies foram notavelmente sazonais nos riachos estudados, com 65% das espécies registradas apenas no verão e apenas 25% das espécies ocorrendo em ambas as estações no mesmo riacho. Nossas descobertas revelaram comunidades de Odonata com interações espaço-temporais marcantes na ocorrência de espécies e contribuem para a compreensão da biologia de Odonata em riachos subtropicais em uma paisagem dominada pelo homem, e também contribuem para melhorar o conhecimento sobre a distribuição de Odonata na América do Sul. Insecta (Insecta Araquari SC, SC , (SC) Brasil 201 2018 todo 1 16 (1 sete 43 espécies. . Selys 1860 187 (Coenagrionidae Linnaeus, Linnaeus (Linnaeus 1758 (Libellulidae estudados 65 25 riacho espaçotemporais espaço temporais homem Sul (SC 20 ( 4 186 175 6 2 17

Abstract We present a checklist of Odonata (Insecta) species occurring in streams in the municipality of Araquari, northeastern state of Santa Catarina (SC), southern Brazil. Five stream reaches were surveyed bi-annually from March 2016 to March 2018. Overall, we recorded 18 taxa (16 species) from 12 genera and four families. Coenagrionidae and Libellulidae were the most species-rich families (seven species each; 43% of the total number of species recorded each). Idioneura ancilla Selys, 1860, Telagrion longum Selys, 1876 (Coenagrionidae) and Erythrodiplax umbrata (Linnaeus, 1758) (Libellulidae) are recorded for the first time in the state of Santa Catarina. Species occurrence patterns were remarkably seasonal in the studied streams, with 70% of the species recorded in the summer only, and only 25% of the species occurring in both seasons at the same stream. Our findings revealed odonate communities with marked space-time interactions in species occurrence and contribute to understand odonate biology in subtropical streams in a human-dominated landscape, and also contribute to improve the knowledge on odonate distribution in South America. Insecta (Insecta Araquari SC, SC , (SC) Brazil biannually bi annually 201 2018 Overall 1 16 (1 speciesrich rich seven each 43 each. . each) Selys 1860 187 (Coenagrionidae Linnaeus, Linnaeus (Linnaeus 1758 (Libellulidae 70 25 spacetime space humandominated human dominated landscape America (SC 20 ( 4 186 175 7 2 17

Resumo Objetivo Esse estudo teve como objetivo analisar aspectos da emergência de adultos Phyllocycla Calvert, 1948 (Odonata: Gomphidae) em ambientes artificiais. As coletas foram realizadas no riacho Sanharó, Caxias, Maranhão, Brasil. Métodos Os espécimes foram analisados sob estereomicroscópio, sendo identificados ao menor nível taxonômico possível. Foram utilizadas caixas de isopor como criadouros, sendo analisados os seguintes tratamentos: a) areia; b) tiras de papel de filtro simulando substrato; c) sem substrato. Para a emergência, os criadouros tiveram suas tampas retiradas e acondicionados em frascos maiores com janelas de tela, menos água e parte do substrato totalmente fora desta. Para verificar a diferença entre os tratamentos, foram utilizados o teste Log-rank e as curvas de sobrevivência de Kaplan-Meier. Resultados As curvas mostram que as emergências ocorreram mais frequentemente nos primeiros dias de criação. Foi observada ausência de diferença estatística entre os grupos. Apesar disso, todos demonstraram sucesso na emergência, com as larvas sem substrato tendo emergido mais rapidamente. Conclusões Ao explorar o uso de diferentes substratos na criação de Odonata, esta pesquisa fornece diretrizes para otimizar as condições laboratoriais, ajudando a superar desafios experimentais e apoiando novos estudos e inventários. Calvert 194 Odonata (Odonata Gomphidae artificiais Sanharó Caxias Maranhão Brasil estereomicroscópio possível tratamentos areia b c tela desta Logrank Log rank KaplanMeier. KaplanMeier Kaplan Meier. Meier Kaplan-Meier grupos disso rapidamente laboratoriais inventários 19 1

Abstract Aim This study aimed to analyze aspects of adult emergence of Phyllocycla Calvert, 1948 (Odonata: Gomphidae) in artificial environments. Samplings were conducted in Sanharó stream, Caxias municipality, Maranhão State, Brazil. Methods Specimens were examined under a stereomicroscope and identified to the lowest possible taxonomic level. Polystyrene boxes were used as rearing sites, and the following methods were analyzed: a) sand; b) strips of filter paper simulating substrate; c) without substrate. For emergence, the rearing sites had their lids removed and were placed inside larger jars with mesh windows, less water, with most of the substrate exposed above the water level. To verify the difference between treatments, the Log-rank test and Kaplan-Meier survival curves were used. Results The curves indicated that emergences occurred more frequently in the initial days of rearing. There was an absence of statistical difference between groups. Despite that, all treatments showed success in emergence, with larvae without substrate emerging more quickly. Conclusions By exploring the use of different substrates in Odonata rearing, this research provides guidelines for optimizing laboratory conditions, helping to overcome experimental challenges and supporting new studies and inventories. Calvert 194 (Odonata Gomphidae environments stream municipality State Brazil level analyzed sand b c windows Logrank Log rank KaplanMeier Kaplan Meier groups quickly conditions inventories 19 1

Resumo Neste estudo, fornecemos um checklist das espécies de Odonata (Insecta) do estado de Santa Catarina (sul do Brasil), juntamente com seus registros de localização nos municípios do estado (quando disponíveis na literatura). Compilamos 147 espécies distribuídas em 60 gêneros e nove famílias, tornando Santa Catarina o segundo estado com mais espécies de Odonata registradas na região Sul do Brasil. As famílias com maior número de espécies foram Libellulidae (54 espécies distribuídas em 18 gêneros), seguida por Coenagrionidae (36 espécies distribuídas em 17 gêneros), Gomphidae (20 espécies distribuídas em dez gêneros) e Aeshnidae (15 espécies distribuídas em oito gêneros). Diversas regiões de Santa Catarina seguem inexploradas (principalmente as regiões centrais e do extremo oeste do estado), enquanto conhecimento no litoral sul e campos de altitude subtropicais permanecem restritos a registros pontuais de ocorrência. Além disso, os registros de distribuição no estado mostram um enorme legado histórico associado à fixação de entomologistas tradicionalmente lotados na região. Nosso estudo destaca o papel do bioma Mata Atlântica na manutenção de altos níveis de diversidade da riqueza de espécies de Odonata no Brasil e também mostra que muitas áreas de florestas subtropicais no Brasil não são amostradas adequadamente. Insecta (Insecta Brasil, , Brasil) quando literatura. literatura . literatura) 14 6 54 (5 1 gêneros, 36 (3 20 (2 15 (1 gêneros. principalmente estado, estado) ocorrência disso adequadamente 5 ( 3 2

Abstract In this study, we provide a checklist of the species of Odonata (Insecta) from the state of Santa Catarina (southern Brazil), along with their location records in the municipalities across the state (whenever possible). We compiled 147 species from 60 genera and nine families, making Santa Catarina the second state with the most Odonata species recorded in southern Brazil. The families with the highest number of species were Libellulidae (54 species from 18 genera), followed by Coenagrionidae (36 species from 17 genera), Gomphidae (20 species from ten genera) and Aeshnidae (15 species from eight genera). Several regions of Santa Catarina are unexplored (mostly the westernmost and central regions of the state), whereas the knowledge in the southern coast and the subtropical highland grasslands remains restricted to sparse occurrence records. Moreover, the distribution records in the state show an enormous historical track associated with the establishment of late entomologists in the region. Our study highlights the role of Atlantic Forest biome in maintaining high levels of diversity of Odonata species richness in Brazil and also shows that many areas in subtropical forests in Brazil are not adequately sampled. Insecta (Insecta Brazil, , Brazil) whenever possible. possible . possible) 14 6 54 (5 1 genera, 36 (3 20 (2 15 (1 genera. mostly state, state) Moreover region sampled 5 ( 3 2

Resumo A compreensão da diversidade e distribuição das espécies é fundamental para o desenvolvimento de estratégias efetivas de manejo e conservação biológica. Nosso objetivo foi abordar a lacuna de conhecimento sobre a diversidade de libélulas na Mata Atlântica nordestina, especificamente na Serra do Parque Nacional de Itabaiana, no estado de Sergipe, Brasil. Durante nosso estudo, registramos 40 espécies e 969 indivíduos de Odonata em seis famílias e 25 gêneros. Este estudo contribui com 27 novos registros de ocorrência de espécies de Odonata em Sergipe, Brasil, destacando a importância de preservar e proteger os habitats desta região. Nossos resultados fornecem informações valiosas sobre a distribuição das espécies de libélulas no estado de Sergipe e na região Nordeste. biológica nordestina Itabaiana Brasil 4 96 2 gêneros Nordeste 9

Abstract Understanding species diversity and distribution cannot be overstated in the development of effective management and biological conservation strategies. Our goal was to address the knowledge gap regarding dragonfly diversity in the northeastern Atlantic Forest, specifically in the Serra of Itabaiana National Park in the state of Sergipe, Brazil. During our study, we recorded 40 species and 969 Odonata individuals across six families and 25 genera. This study contributes 27 new occurrence records of Odonata species in Sergipe, Brazil, highlighting the significance of preserving and protecting the habitats of this region. Our findings provide valuable information on the distribution of dragonfly species in the state of Sergipe and the Northeast region. strategies Forest Brazil 4 96 2 genera region 9

Resumen Reportamos diez nuevos registros de Odonata, incluyendo la verdadera distribución de Acanthagrion yungarum Ris, 1918 en Colombia. Se reporta por primera vez el género Dolonagrion Garrison & von Ellenrieder, 2008 en el país, con notas de su hábitat. Los otros ocho nuevos registros son A. amazonicum Sjöstedt, 1918, A. phallicorne Leonard, 1977, A. truncatum Selys, 1876, Mesoleptobasis cantralli Santos, 1961, Metaleptobasis lillianae Daigle, 2004, Neoneura denticulata Williamson, 1917, Neuraeschna maya Belle, 1989 y Protoneura klugi Cowley, 1941. Se proporciona un mapa de las localidades de colecta y fotografías de las especies.

Abstract We report ten new records of Odonata, including the true distribution of Acanthagrion yungarum Ris, 1918 in Colombia. The genus Dolonagrion Garrison & von Ellenrieder, 2008 is reported for the first time in the country with notes of its habitat. The other eight new records are A. amazonicum Sjöstedt, 1918, A. phallicorne Leonard, 1977, A. truncatum Selys, 1876, Mesoleptobasis cantralli Santos, 1961, Metaleptobasis lillianae Daigle, 2004, Neoneura denticulata Williamson, 1917, Neuraeschna maya Belle, 1989, and Protoneura klugi Cowley, 1941. A map of localities and photographs of the species are provided.

Resumen Nuestro objetivo fue investigar el desarrollo larval de Argia joergenseni Ris en tres arroyos ubicados en diferentes latitudes y ecorregiones (Yungas y Chaco) en Argentina. Medimos el ancho de la cabeza y la longitud de la pteroteca del ala metatorácica de las larvas mensualmente y se las clasificó en cinco clases de tamaño. Nuestros resultados mostraron distintos patrones de crecimiento larval entre los sitios de estudio. En los sitios de Yungas (latitud 26º S) se registró una alta proporción de individuos pequeños durante todo el año, lo que sugiere un ciclo de vida multivoltino. En contraste, las larvas en la región del Chaco (latitud 32º S) mostraron una marcada estacionalidad en el crecimiento. Los hallazgos indican una correlación negativa entre el voltinismo y la latitud en A. joergenseni. La especie exhibió una época de vuelo casi continua en las Yungas, mientras que en el límite sur de su distribución (Chaco), la época de vuelo se limitó a los meses más cálidos. Este estudio proporciona información importante sobre la ecología de las larvas de A. joergenseni, contribuyendo a una mejor comprensión de la dinámica de las comunidades de caballitos del diablo y facilitando el desarrollo de medidas de conservación efectivas.

Abstract Our aim was to investigate the larval development of Argia joergenseni Ris in three streams located at different latitudes and ecoregions (Yungas and Chaco) in Argentina. We measured the head width and the metathoracic wing sheath length, and classified larvae into five size classes. Our results showed different patterns of larval growth between the three study sites. At the Yungas sites (latitude 26º S), larvae exhibited a high proportion of small individuals throughout the year, suggesting a multivoltine life cycle. In contrast, larvae in the Chaco region (latitude 32º S) showed marked seasonality in growth. The findings indicate a negative correlation between voltinism and latitude in A. joergenseni. The species exhibited an almost continuous flight season in the Yungas, while at the southern limit of its distribution (Chaco), the flight season was limited to the warmest months. This study provides important information on the larval ecology of A. joergenseni, contributing to a better understanding of the dynamics of damselfly communities and facilitating the development of effective conservation measures.

Abstract The High Altitude Fields (HAF) are unique phytosociological features that occur only in certain regions of the Atlantic Forest. It is composed of herbaceous and shrubby vegetation and shallow soils that promote local water infiltration and recharge. Occurring on top of hills, the HAF are isolated units in the landscape, connecting with the matrix through associated ecosystems (springs with riparian forests and "capóes de mata", which are natural islands of arboreal vegetation, commonly associated with rural vegetation, such as high-altitude fields, located above 1,200 m in phytogeographic domains of the Atlantic Forest, Cerrado or Caatinga). These areas have great species endemism, and studies concerning the order Odonata are still scarce. Thus, we aimed to evaluate the ecological responses (richness, diversity, specificity) of adult odonates in these ecosystems. The study was conducted from November 2020 to March 2021 in three areas in the Po^os de Caldas Plateau, Minas Gerais state, Brazil. A total of 45 species (247 specimens) were collected, with the highest total richness being recorded for Anisoptera. Among the sampled areas, there was no difference in Anisoptera communities, but there was a difference in Zygoptera species composition. In general, the most preserved remnant of HAF, the greater it presents greater richness of Odonata and harbors a regional pool of species.

Resumen Los campos de gran altitud (HAF) son características fitosociológicas únicas que solo se encuentran en ciertas regiones de la Mata Atlántica. Están compuestos por vegetación herbácea y arbustiva, así como suelos poco profundos que favorecen la infiltración local de agua y su recarga. Situados en la cima de las colinas, los HAF son unidades aisladas en el paisaje, conectándose con la matriz a través de ecosistemas asociados (manantiales con bosques ribereños y "capóes de mata", que son islas naturales de vegetación arbórea, comúnmente asociadas con la vegetación rural, como los campos de gran altitud ubicados por encima de los 1.200 m en los dominios fitogeográficos de la Mata Atlántica, el Cerrado o la Caatinga). Estas áreas presentan un gran endemismo de especies, y los estudios sobre el orden Odonata aún son escasos. Por lo tanto, nuestro objetivo fue evaluar las respuestas ecológicas (riqueza, diversidad, especificidad) de odonatos adultos en estos ecosistemas. El estudio se llevó a cabo desde noviembre de 2020 hasta marzo de 2021 en tres áreas situadas en la meseta de Po^os de Caldas, estado de Minas Gerais, Brasil. Se recolectó un total de 45 especies (247 ejemplares), siendo Anisoptera la que presentó mayor riqueza total. Entre las áreas muestreadas no hubo diferencia en las comunidades de Anisoptera, pero sí hubo diferencias en la composición de especies de Zygoptera. En general, cuanto más preservado esté el remanente de HAF, mayor será la riqueza de Odonata que alberga y más variado será el conjunto regional de especies.

ABSTRACT The invertebrate fauna in Northern Chilean inland waters has poorly studied due the difficult access, and there are only studies on crustacea species based in scarce expeditions. The aim of the present study is do a first community study on aquatic invertebrate communities reported in Salado River, a subsaline river in north of Chile, that is a tributary of Loa River the most long river in Chile (23°S, Antofagasta region), based on size overlap null models. The results revealed the presence of Diptera larvae (Simulium sp., Gigantodax sp., and Ortochladinae), coleoptera larvae (Elmidae), Odonata larvae, Aranae, and amphipod Hyalella kochi. The results revealed that there is a size overlap, this means that the reported species would share their ecological niches. It is the first description of niche overlap for invertebrate Chilean rivers, and the exposed results are similar for descriptions for decapods in marine environments.

RESUMEN La fauna de invertebrados en aguas interiores del norte de Chile ha sido poco estudiada debido al difícil acceso, y solo existen estudios sobre especies de crustáceos basados en escasas expediciones. El objetivo del presente trabajo es realizar un primer estudio comunitario de las comunidades de invertebrados acuáticos reportadas en el río Salado, un río subsalino del norte de Chile, afluente del río Loa, el río más largo de Chile (23°S, región de Antofagasta), basado en modelos nulos de superposición de tamaño. Los resultados revelaron la presencia de larvas de dípteros (Simulium sp., Gigantodax sp. y Ortochladinae), larvas de coleópteros (Elmidae), larvas de Odonata, Aranae y el anfípodo Hyalella kochi. Los resultados revelaron que existe una superposición de tamaño, esto significa que las especies reportadas compartirían sus nichos ecológicos. Es la primera descripción de superposición de nicho para ríos chilenos de invertebrados, y los resultados expuestos son similares para descripciones de decápodos en ambientes marinos.

RESUMEN Los lagos altoandinos son ecosistemas afectados por múltiples presiones antrópicas que alteran la calidad del agua y las comunidades bióticas, siendo los macroinvertebrados acuáticos excelentes bioindicadores para estos ecosistemas. El presente trabajo analiza la dinámica de la comunidad de macroinvertebrados asociada a Egeria densa, la relación con las variables fisicoquímicas, los índices bióticos y la interacción predador-presa en el litoral del Lago de Tota. Este trabajo se desarrolló en tres campañas sobre nueve estaciones de muestreo en el perímetro del lago. Dentro de los hallazgos, Hyallela sp. (30 %) y Dicrotendipes sp.(27 %) son los taxones más abundantes y dominantes del estudio, siendo bioindicadores de presencia de materia orgánica en descomposición y disminución en la calidad del agua. El análisis ANOVA de las variables fisicoquímicas del agua y los nutrientes de Egeria densa mostró diferencias significativas a nivel temporal. Los índices bióticos mostraron diferencias en la calidad del agua, determinando una posible zonificación de este parámetro en el litoral. Finalmente, para identificar las relaciones de la comunidad, se presenta un modelo predador-presa, con Hyalella sp. como presa e Ischnura sp. como predador a través de las ecuaciones Lotka-Volterra, encontrando que hay concordancia entre el comportamiento de las abundancias medidas y las simuladas. De esta forma, la dinámica trófica contribuye a entender las comunidades y su proyección en el tiempo con relación a las condiciones ambientales de la zona litoral.

ABSTRACT High Andean lakes are ecosystems affected by multiple anthropogenic pressures that alter water quality and biotic communities, and aquatic macroinvertebrates are excellent bioindicators for these ecosystems. The present work analyzes the dynamics of the macroinvertebrate community associated with Egeria densa, the relationship with physicochemical variables, biotic indices, and predator-prey interaction in the littoral of Lake Tota. This work was developed in three campaigns on nine sampling stations on the perimeter of the lake. Among the findings, Hyallela sp. (30 %) and Dicrotendipes sp. (27 %) are the most abundant and dominant taxa of the study, being bioindicators of the presence of decomposing organic matter and decrease in water quality. ANOVA analysis of the physicochemical variables of water and nutrients of Egeria densa showed significant differences at the temporal level. The biotic indices showed differences in water quality, determining a possible zoning of this parameter along the coast. Finally, to identify community relationships, a predator-prey model is presented, with Hyalella sp. as prey and Ischnura sp. as predator through the Lotka-Volterra equations, finding that there is agreement between the behavior of measured and simulated abundances. In this way, the trophic dynamics contribute to understand the communities and their projection in time in relation to the environmental conditions of the littoral zone.

RESUMEN El conocimiento de la biodiversidad acuática de ecosistemas lénticos es escaso en muchas regiones del mundo. Por ello, se consideró importante realizar evaluaciones preliminares de la fauna bentónica de poca profundidad en tres franjas subacuáticas de muestreo entre los 0 a 10 m en una zona rocosa del área noreste del lago de Coatepeque, El Salvador. Las familias más abundantes fueron Thiaridae (Gastropoda), Hyalellidae (Malacostraca, Amphipoda) y larvas de Coenagrionidae (Insecta, Odonata) entre la orilla y 2,5 m de profundidad. En los sedimentos finos (10 m) se encontró una riqueza de especies y abundancia reducida en comparación a los estratos menos profundos, así como una gran cantidad de conchas vacías de caracoles de la familia Thiaridae y cápsulas cefálicas de larvas de quironómidos (Insecta, Diptera).

ABSTRACT The knowledge of aquatic biodiversity in lentic ecosystems is scarce in many regions of the world. Therefore, it was considered important to accomplish preliminary assessments of benthic fauna associated with low depths in three sampling subaquatic fringes between 0 and 10 m on a rocky shore along the northeast area of Coatepeque Lake, El Salvador. The most abundant families were Thiaridae (Gastropoda), Hyalellidae (Malacostraca, Amphipoda), and Coenagrionidae (Insecta, Odonata) from the edge to a depth of 2,5 m. A reduced species richness and abundance were found in fine sediments (10 m) in comparison to shallower strata, as well as a lot of empty shells of the Thiaridae family and cephalic capsules of chironomid larvae (Insecta, Diptera).

Abstract Three species of odonates represented in the Entomological Collection of the Universidad Nacional de San Antonio Abad del Cusco (ECUC) are cataloged for the Andean Wetland Lucre - Huacarpay, department of Cusco, Peru, and distribution data for these species are provided.

Resumen Tres especies de odonatos representadas en la Colección Entomológica de la Universidad Nacional de San Antonio Abad del Cusco (CEUC) son catalogadas para el humedal andino Lucre - Huacarpay, departamento de Cusco, Perú y se aportan datos de distribución para dichas especies.