Abstract The impact of several pesticides on the diversity of arthropofauna associated with commercial potato cultivation was evaluated in Mollepata, province of Anta in Cusco-Peru, to determine which trophic guilds (TG) are affected. The treatments were fipronil, propineb and conventional (rotation of several pesticides). Thirty-five pitfall traps were placed in each treatment with the purpose of collecting the arthropofauna in potatoes. Five applications of the corresponding treatment were carried out and a total of five check-ups were carried out with a frequency of fourteen days. The most abundant families were Hemiptera: Cicadellidae (19.82%), Coleoptera: Chrysomelidae (16.33%) and Diptera: Sciaridae (11.92%). Propineb was the treatment that presented, at the family level, the largest total number of individuals. For the entire study, at the level of TG, the decreasing sequence of the total number of families was: phytophagous with 30 families (32.97%); predators 23 families (26.37%); detritivores 20 families (21.98%); parasitoids 10 families (9.89%); pollinators six families (6.59%) and finally omnivorous with two families (2.20%). Propineb presented the highest values of the total number of individuals in phytophages and parasitoids. On the other hand, alpha diversity indices did not present differences between treatments for omnivores, detritivores, pollinators and predators. The beta diversity indices were variable, generally obtaining greater similarity between the fipronil and conventional treatment. The phytophagous and parasitoid TGs were those that presented the most differentiated values when evaluating the effect of pesticides on soil arthropofauna based on alpha diversity indices.

Resumen Se evaluó el impacto de varios plaguicidas sobre la diversidad de la artropofauna asociada al cultivo de papa comercial, en Mollepata, provincia de Anta en Cusco-Perú, para determinar que gremios tróficos (GT) de la artropofauna son afectados. Los tratamientos fueron fipronil, propineb y convencional (rotación de varios plaguicidas). Se dispusieron 35 trampas de caída en cada tratamiento con la finalidad de recolectar la artropofauna presente en el cultivo de papa. Fueron realizadas cinco aplicaciones del tratamiento correspondiente y se efectuó un total de cinco revisiones con una frecuencia de catorce días entre ellas. Las familias más abundantes fueron Hemiptera: Cicadellidae (19,82 %), Coleoptera: Chrysomelidae (16,33 %) y Diptera: Sciaridae (11,92 %). El propineb fue el tratamiento que presentó, a nivel de familia, el mayor número total de individuos. Para todo el estudio, a nivel de GT la secuencia decreciente del total de familias fue: fitófago con 30 familias (32,97 %); depredadores 23 familias (26,37 %); detritívoros 20 familias (21,98 %); parasitoides 10 familias (9,89 %); polinizadores seis familias (6,59 %) y omnívoro dos familias (2,20 %). El propineb presentó los valores del número total de individuos más altos en los fitófagos y los parasitoides. Por otro lado, los índices de diversidad alfa no presentaron diferencias entre tratamientos para los gremios omnívoros, detritívoros, polinizadores y depredadores. Los índices de diversidad beta fueron variables, obteniendo en general una mayor similaridad entre el tratamiento de fipronil y el convencional. Los GT fitófagos y parasitoides fueron los que presentaron los valores más diferenciados al evaluar el efecto de los plaguicidas en la artropofauna del suelo con base a los índices de diversidad alfa.

Abstract The first record of a species of Lexiphanes Gistel (Cryptocephalini) on Waltheria indica Linnaeus (Malvaceae) flowers in eastern Brazil is presented. From eggs obtained in laboratory rearing, the duration of the life cycle of this species from egg to adult is reported, which was estimated at 66.5 days.

Resumen Se presenta el primer registro de una especie de Lexiphanes Gistel (Cryptocephalini) sobre flores de Waltheria indica Linnaeus (Malvaceae) en el este de Brasil. A partir de huevos obtenidos de una crianza en laboratorio, se reporta la duración del ciclo de vida de esta especie desde huevo hasta adulto, el cual se estimó en 66,5 días.

ABSTRACT: Pest insects are one of the major factors affecting the productivity of sugarcane, and especially those associated with the soil, which damage the crop if not controlled. There is little information on the insect associated with the soil in the sugarcane crop in the state of Mato Grosso do Sul, Brazil. This study evaluated the occurrence, abundance and population variation of soil-associated insects in sugarcane crops in four counties in the state of Mato Grosso do Sul during a period from September 2009 to August 2010. For the capture of insects, deep in the soil trenches were (50 x 50 x 30 width x length x depth). It was observed that county of Maracaju has a high incidence of soil insects in sugarcane crop. Specimens of the family Scarabaeidae are abundant in sugarcane fields of the state of Mato Grosso do Sul, being Liogenys suturalis the predominant species. Soil insects of the Chrysomelidae family were found with greater abundance in Dourados and Naviraí while Noctuidae, represented only by the Hyponeuma taltula, occurred mainly in Dourados. Insects of the family Termitidae occur in sugarcane fields in the counties of Maracaju and Naviraí but not in Nova Alvorada do Sul and Dourados. Sphenophorus levis and Metamasius hemipterus were alsoreported in the sugarcane fields from Maracaju, being the occurrence these species the first record in the Mato Grosso do Sul State. The determined occurrence of different soil insects in the sugarcane fields may help in their management in the four counties studied.

RESUMO: Os insetos-praga são um dos principais fatores que afetam a produtividade da cana-de-açúcar e, principalmente, aqueles associados ao solo, que prejudicam a cultura se não forem controlados. Existem poucas informações sobre a fauna de insetos associada ao solo na cultura da cana-de-açúcar no estado de Mato Grosso do Sul (MS), Brasil. O objetivo deste estudo foi avaliar a ocorrência, abundância e variação populacional de insetos associados ao solo em lavouras de cana-de-açúcar em quatro municípios do estado de Mato Grosso do Sul durante o período de setembro de 2009 a agosto de 2010. Para a captura de insetos, foram feitas trincheiras (50 cm x 50 cm x 30 cm - largura x comprimento x profundidade) no solo. Observou-se que o município de Maracaju apresenta alta incidência de insetos de solo na cultura da cana-de-açúcar. Exemplares da família Scarabaeidae são abundantes nos canaviais do MS, sendo Liogenys suturalis a espécie predominante. Insetos de solo da família Chrysomelidae foram encontrados com maior abundância em Dourados e Naviraí enquanto Noctuidae, representado apenas por Hyponeuma taltula, ocorreu principalmente em Dourados. Insetos da família Termitidae ocorrem em canaviais nos municípios de Maracaju e Naviraí, mas não em Nova Alvorada do Sul e Dourados. Sphenophorus levis e Metamasius hemipterus (Coleoptera: Curculionidae) também foram encontrados nos canaviais de Maracaju, sendo a ocorrência dessas espécies o primeiro registro no MS. A ocorrência determinada de diferentes insetos de solo nos canaviais auxiliará o manejo nos quatro municípios estudados.

Resumen Se encontraron individuos de Walterianella inscripta Jacoby (Coleoptera: Chrysomelidae), causando daño al follaje de árboles de Paulownia elongata S.Y. Hu en San Carlos, Pital, Costa Rica. W. inscripta causa rasguños y agujeros que miden entre 0.1 y 0.07 cm2 en el follaje. Observamos una gran incidencia de daño por defoliación que afecta a todos los árboles, con una severidad que en la mayoría de los casos afectó a más del 75% del follaje arbóreo. Este es el primer informe del daño de W. inscripta en P. elongata en Costa Rica.

Abstract We found Walterianella inscripta Jacoby (Coleoptera: Chrysomelidae), causing damage to foliage of Paulownia elongata S.Y. Hu trees in San Carlos, Pital, Costa Rica. W. inscripta causes scratches and holes measuring between 0.1 and 0.07 cm2 in foliage. We observed a great incidence of defoliation damage affecting all trees, with a severity that in most cases affected over 75% of tree foliage. This is the first report of the damage of W. inscripta in P. elongata in Costa Rica.

ABSTRACT Alticini is the most diverse tribe of Chrysomelidae with approximately 8,000 species. Despite of its high diversity, little is known about their natural history and immature stages. Herein, we describe the immatures of Omophoita personata (Illiger, 1807) reared in laboratory from adults sampled in field. We also investigated and compared with immatures of O. octoguttata (Fabricius, 1775). Detailed morphology and chaetotaxy are presented. Larvae of O. personata have their bodies covered with tubercles and the stemmata are absent. These characteristics are shared with other Oedionychina species, reinforcing the stability of these morphological characteristics as diagnostic of this subtribe. This study provides important descriptive and comparative data that increases the knowledge about Alticini immatures.

Abstract This study presents an updated list of leaf beetles from Mexico (Coleoptera: Megalopodidae, Orsodacnidae, and Chrysomelidae). The first record of Physonota gigantea Boheman from Mexico is reported, and new state records for 16 species are also reported from the specimens examined in Mexican collections (CCFES-Z, CNIN, CNRF, IEXA). Synonyms and the state geographic distribution for each species is provided. In total, 2,556 valid species and 127 subspecies are hitherto known, Megalopodidae comprises 31 species belonging to 3 genera, Orsodacnidae comprises 17 species belonging to 2 genera, and Chrysomelidae includes 2,508 species in 327 genera. Acanthoscelides with 122 species, Lema with 96 species, Pachybrachis with 84 species, Cryptocephalus with 77 species, and Chlamisus with 57 species, were the most diverse genera. The Mexican states with the highest number of leaf beetles were Veracruz with 945 species, Oaxaca with 799, Guerrero with 654, and Morelos with 535 species.

Resumen En este trabajo se presenta una lista actualizada de los crisomélidos de México (Coleoptera: Megalopodidae, Orsodacnidae y Chrysomelidae). Se registra por primera vez para México la especie Physonota gigantea Boheman y se proporcionan nuevos registros estatales para 16 especies, a partir de los ejemplares revisados en colecciones mexicanas (CCFES-Z, CNIN, CNRF, IEXA). Para cada especie se proporcionan los sinónimos y los estados donde se han registrado. En total se reconocen hasta el momento 2,556 especies válidas y 127 subespecies de crisomélidos sensu lato, Megalopodidae comprende 31 especies dentro de 3 géneros, Orsodacnidae cuenta con 17 especies en 2 géneros y Chrysomelidae abarca 2,508 especies dentro de 327 géneros. Los géneros más diversos fueron Acanthoscelides con 122 especies, Lema con 96 especies, Pachybrachis con 84 species, Cryptocephalus con 77 especies y Chlamisus con 57 especies. Los estados con el mayor número de crisomélidos fueron Veracruz con 945 especies, Oaxaca con 799, Guerrero con 654 y Morelos con 535 especies.

ABSTRACT Coleoptera order in Brazil presents 105 families with approximately 28,000 species. The life cycle and diversity of Coleoptera are strongly influenced by climate and vegetation. The objective of this study was to evaluate the seasonality and distribution of Coleoptera families in an area of the Cerrado in the Federal District (DF) of Brazil. The insects were collected monthly, between June 2015 and May 2016, using a light trap activated only in nights with a new moon, in an area of cerrado sensu stricto in Planaltina/DF, Brazil. The data were correlated with climatic variables. A total of 21,100 Coleoptera specimens belonging to 34 families were collected, with Melolonthidae (n = 11,075), Carabidae (n = 2,522), Scarabaeidae (n = 2,506), Bostrichidae (n = 1,196), and Chrysomelidae (n = 1,086) being the most abundant. Coleoptera were significantly more abundant in the first half of the rainy season. There was a significant and positive correlation between the abundance of Coleoptera and the climatic variables temperature and precipitation. The data presented in this study are related to an atypical year under the strong influence of the El Niño phenomenon, which may influence the abundance of Coleoptera. Circular analysis revealed that Coleoptera, and the most abundant families, presented seasonality throughout the year with a grouped distribution at the beginning of the rainy season (October to December). This study demonstrates that the richness and abundance of the Coleoptera order, in the Cerrado, is strongly influenced by the characteristic climatic seasons of the biome.

ABSTRACT The genus Henicotherus Brèthes 1928 and H. porteri Brèthes 1928 are redescribed and a neotype is designated. A new species is described and biological and distributional data are given for both species. On the other hand, a new species registered in expeditions carried out in Chañaral Island (Atacama Region) and Choros Island (Coquimbo Region), in the Los Choros archipelago is described. Biological and distribution data for both species and recommendations regarding the conservation of Henicotherus species are given.

RESUMEN Se redescribe el género Henicotherus Brèthes, 1928 (Coleoptera, Chrysomelidae) género endémico del norte de Chile y se designa un neotipo para H. porteri Brèthes, 1928. Además, se describe una nueva especie colectada recientemente en expediciones realizadas en Isla Chañaral (Región de Atacama) e Isla Choros (Región de Coquimbo) en el archipiélago de Los Choros. Se entregan datos biológicos y distribucionales para ambas especies, y recomendaciones en relación a la conservación de las especies de Henicotherus.

Abstract Differences in species composition between sites (β diversity) may be the result of spatial species replacement (turnover) or nestedness (subgroups of species from a more diverse site). In fragmented landscapes, the environmental factors that lead to these differences may be spatially structured. Herein, our objective is to determine if the β diversity of Chrysomelidae (Coleoptera) is due to turnover or nestedness and whether the observed pattern is due to loss of forest cover or spatial processes in forest remnants immersed in a matrix dominated by intense agricultural practice. We used an incidence matrix of 99 species sampled from 16 forest remnants and found that the difference in species composition among the fragments is mostly determined by turnover and that this variation is not explained by forest cover or spatial variables. In regions where high habitat loss has generated landscapes containing small and islated forest fragments, structural features, related both to habitat (area, isolation, shape, etc.) and landscape (land use, landscape heterogeneity, etc.) could predict diversity patterns.

Resumen El aumento de la frecuencia de lo escarabajo rojo de la anacardiácea Crimissa cruralis (Coleoptera: Chrysomelidae) en poblaciones de Anacardium occidentale (Anarcardiaceae) del Brasil es motivo de preocupación. Se evaluó la mortalidad (en larvas de segundo y tercer instar) producida por la aplicación in vivo de una formulación comercial con esporas del hongo entomopatógeno, Beauveria bassiana. El tratamiento de larvas con concentraciones de 1,2 x 106, 2,5 x 106, 3,7 x 107 e 5,0 x 107 conidia/Ml resultó en 49, 56, 66 y 72 % de mortalidad dentro de ocho días, respectivamente. Se recomienda emplear la formulación de B. bassiana en las concentraciones más bajas (1,2 x 106 y 2,5 x 106 conidia/mL) con aplicación repetida para evitar la posible inactivación de lo hongo por factores abióticos ambientales. Las evaluaciones de costo-beneficio del uso de este agente biológico serán importantes para determinar la viabilidad económica de su aplicación en el campo.

Abstract The increased pest actions of the red cashew beetle Crimissa cruralis (Coleoptera: Chrysomelidae in Brazilian populations of cashew Anacardium occidentale (Anarcardiaceae) is a cause for concern. The entomopathogenic fungus, Beauveria bassiana, was evaluated as a biocontrol of larvae. The percent mortalities of second and third instar larvae produced by in vivo application of a commercial formulation containing the fungal spores were evaluated. Treatment of larvae at concentrations of 1.2 x 106, 2.5 x 106, 3.7 x 107 e 5.0 x 107 conidia/mL resulted in 49, 56, 66 and 72 % mortality within eight days, respectively. Based on the finding, it is recommended that the B. bassiana formulation should be employed at the lowest concentrations (1.2 x 106 and 2.5 x 106 conidia/mL) with repeat application to avoid possible inactivation of the fungus by abiotic environmental factors. Cost-benefit assessments of the use of this biological agent will be important for determining the economic feasibility of its application in the field.

Resumen La condición fisiológica y la respuesta inmune de poblaciones que habitan a distintas altitudes pueden mostrar adaptación local a las condiciones abióticas y bióticas locales. Entre los organismos más susceptibles al cambio ambiental están los ectotermos pequeños con dietas especializadas, debido a que su ciclo de vida es, en gran medida, afectado tanto por la temperatura como por la presencia de recursos específicos. Este estudio se enfoca en dos especies de escarabajos (Chrysomelidae) presentes a lo largo de un gradiente altitudinal en Costa Rica: Cephaloleia belti Baly, una especie de dieta generalista, y Chelobasis bicolor Gray, de dieta especialista. Se comparó el tamaño corporal, la condición energética (almacenamiento de lípidos), la masa muscular y la condición inmunológica (respuesta de melanización) entre poblaciones de escarabajos de un bosque tropical (a 50 m de altitud) y un bosque tropical montano (a 2 000 m de altitud). Las variables seleccionadas reflejan las condiciones nutricionales actuales y pasadas y son buenos estimadores de la adecuación individual. Se analizaron un total de 172 escarabajos de ambas especies, sexos y elevaciones. Predecimos que los escarabajos a mayor elevación tendrán mayor tamaño corporal, mayor condición energética y menor respuesta inmune asociadas con los requerimientos metabólicos y la presión de los parásitos asociados con ambientes fríos. En general, los escarabajos a mayor altitud fueron más grandes, tuvieron más lípidos y masa muscular, y presentaron una mayor respuesta inmune de melanización que los escarabajos a menor altitud. Es posible que las diferencias entre las poblaciones a diferentes altitudes reflejen adaptaciones locales a las condiciones ambientales a distintas altitudes o plasticidad fenotípica. Sin embargo, el efecto de la altitud no fue de la misma magnitud entre las dos especies ni entre los dos sexos. La medición de caracteres fisiológicos en organismos ectotérmicos de amplia distribución altitudinal puede ser útil para entender las respuestas de ciertas especies al cambio climático.

Abstract The physiological condition and immune responses of organisms living at different elevations are expected to display local adaptations to the different climatic and biotic conditions. Small ectotherms with specialized diets are highly susceptible to environmental change, as their life cycle is largely affected by temperature and by the presence of specific resources. This study focuses on two species of rolled-leaf beetles (Chrysomelidae), both present at two different elevations in Costa Rica: Cephaloleia belti Baly, a diet-generalist, and Chelobasis bicolor Gray, a diet-specialist. Body size, energetic condition (lipid storage), muscle mass and immune condition (melanization response) were compared in beetle populations from a tropical rainforest (50 m elevation) and a tropical montane forest (2 000 m elevation). These measurements reflect current and past nutritional condition and hence are good estimators of individual fitness. We analyzed a total of 172 individuals from both species, sexes and elevations. We predicted that beetles at higher elevation would display larger body size, higher energetic condition and lower immune response associated with metabolic requirements and parasitic pressure in colder temperatures. In general, beetles at high altitude were larger, had more lipids and muscle and showed stronger melanization (i.e., immune response) than beetles at low altitudes. Such differences among populations at different elevations may reflect local adaptation to altitude or phenotypic plasticity. However, the effect of elevation was not equivalent amongst species or sex. Measuring physiological traits in organisms with broad elevational distributions could be useful in understanding possible species responses to climate change.

Resumo A cultura do eucalipto tem crescido nos últimos anos na Mesorregião da Zona da Mata Mineira. Entretanto, apesar dos fatores favoráveis para o estabelecimento de plantios de eucalipto nessa região, a ocorrência de besouros desfolhadores da família Chrysomelidae pode inviabilizar tais projetos florestais. Portanto, o objetivo deste trabalho foi registrar e caracterizar a ocorrência desses besouros em plantios de eucalipto localizados na Zona da Mata Mineira. Foi avaliado apenas um plantio por localidade com base no primeiro relato de ocorrência desses insetos. Em cada plantio, 100 árvores foram amostradas para obtenção do percentual de árvores atacadas. Verificou-se a presença de Costalimaita ferruginea, Agrianes validicornis e Metaxyonycha angusta injuriando árvores de eucalipto em Astolfo Dutra, Coimbra, Viçosa e Visconde do Rio Branco. Apenas Costalimaita ferruginea ocorreu em nível de surto nos quatro plantios vistoriados. Constatou-se que, em Visconde do Rio Branco, todas as árvores estavam atacadas por Costalimaita ferruginea e em Viçosa, Coimbra e Astolfo Dutra o percentual de ataque foi de 15%, 46% e 64%, respectivamente. Os resultados obtidos neste trabalho servem de alerta para os produtores que já possuem plantios localizados na região da Zona da Mata Mineira e para aqueles que pretendem estabelecer novos plantios, assim como para o poder público que fornece assistência técnica aos pequenos produtores.

Abstract Eucalyptus plantations have been growing in the last years in the Mesoregion of Zona da Mata Mineira, Minas Gerais state, Brazil. However, in spite of the favorable factors for the establishment of eucalypt plantations in this region, the occurrence of leaf-eating beetles of the family Chrysomelidae can make such forest projects unfeasible. Therefore, this work aimed to record and characterize the occurrence of leaf-eating beetles in eucalypt plantations located in Zona da Mata Mineira. One plantation by location was evaluated based in the first record of occurrence of the insects in the year 2008. In each plantation, 100 trees were sampled to obtain the frequency of damaged trees. The following beetles were observed: Costalimaita ferruginea; Agrianes validicornis and Metaxyonycha angusta, damaging eucalypt trees in Astolfo Dutra, Coimbra, Viçosa and Visconde do Rio Branco counties. Only outbreaks of Costalimaita ferruginea happened in the four plantations evaluated. In Visconde do Rio Branco, all the trees were damaged by Costalimaita ferruginea and in Viçosa, Coimbra and Astolfo Dutra 15%, 46% and 64% were damaged, respectively. The results obtained in this work serve as an alert for authorities and forest growers acting in the Zona da Mata Mineira, Minas Gerais state.

Abstract: The Coleopterological Collection of the Facultad de Estudios Superiores Zaragoza (CCFES-Z), UNAM has 28,189 specimens grouped in 2,596 morphospecies belonging to the suborders Adephaga, Archostemata, Myxophaga and Polyphaga. The specimens are classified into 10 superfamilies, 60 families, 85 subfamilies, 238 tribes and 78 subtribes. To date, 808 genera and 1,207 species have been identified. Pachybrachis Chevrolat with 57 morphospecies (Chrysomelidae), is the most diverse genus, following of Phyllophaga Harris with 41 (Scarabaeidae), Agrilus Curtis with 39 (Brupestidae), Cryptocephalus Geoffroy with 33 (Chrysomelidae), and Systena Chevrolat with 30 (Chrysomelidae). The collection housed type specimens of the species: Brachiacantha angulata Nestor-Arriola & Toledo-Hernández, B. brevicuspidata Nestor-Arriola & Toledo-Hernández, B. truncata Nestor-Arriola & Toledo-Hernández, Cephalocyclus ordonezi Dellacasa, Dellacasa & Gordon, Macrocopturus burserophagus Muñiz & Ordóñez, Mastostethus gracilis Rodríguez-Mirón and Phyllophaga villardoi Morón & Ordóñez-Reséndiz. Polyphaga is the suborder most diverse with 2,372 morphospecies and 26,375 specimens. However, Adephaga has only three families, and it has a high representativeness, 8.5% and 6.4% of the total of morphospecies and specimens. Archostemata and Myxophaga has one specimen and one species. Chrysomelidae is the family most diverse with 859 morphospecies and 11,295 specimens, following of Curculionidae and Cerambycidae. Beetles at the CCFES-Z represent species of 20 Mexican states.

Resumen: Se presenta el estado actual de la Colección Coleopterológica de la Facultad de Estudios Superiores Zaragoza (CCFES-Z), UNAM. La CCFES-Z está integrada por 28,189 ejemplares agrupados en 2,596 morfoespecies pertenecientes a los subórdenes Adephaga, Archostemata, Myxophaga y Polyphaga. El total de individuos corresponden a 10 superfamilias, 60 familias, 85 subfamilias, 238 tribus y 78 subtribus. Hasta el momento se han identificado 808 géneros y 1,207 especies. Entre los géneros mejor representados se encuentran Pachybrachis Chevrolat con 57 morfoespecies (Chrysomelidae), Phyllophaga Harris con 41 (Scarabaeidae), Agrilus Curtis con 39 (Brupestidae), Cryptocephalus Geoffroy con 33 (Chrysomelidae) y Systena Chevrolat con 30 (Chrysomelidae). Se cuenta con 60 ejemplares tipo de las especies Brachiacantha angulata Nestor-Arriola & Toledo-Hernández, B. brevicuspidata Nestor-Arriola & Toledo-Hernández, B. truncata Nestor-Arriola & Toledo-Hernández, Cephalocyclus ordonezi Dellacasa, Dellacasa & Gordon, Macrocopturus burserophagus Muñiz & Ordóñez, Mastostethus gracilis Rodríguez-Mirón y Phyllophaga villardoi Morón & Ordóñez-Reséndiz. Polyphaga es el suborden con mayor número de morfoespecies (2,372) y ejemplares (26,375); sin embargo, Adephaga con sólo tres familias tiene una alta representatividad, 8.5% y 6.4% del total de morfoespecies y ejemplares. Archostemata y Myxophaga están representados por un individuo y una especie, cada uno. Chrysomelidae es la familia más diversa con 859 morfoespecies y 11,295 ejemplares, seguida de Curculionidae y Cerambycidae. Los coleópteros que forman parte de la CCFES-Z documentan especies de 20 entidades federativas de México.

RESUMO A área de uma mancha de habitat pode aumentar a riqueza local de espécies tanto diretamente (pelo balanço entre imigração e extinção) quanto indiretamente (por aumentar a heterogeneidade do habitat e/ou como efeito do esforço amostral). Ambientes mais heterogêneos apresentam maior variedade de recursos e condições permitindo a coexistência de espécies por diferenciação de nicho. Neste estudo mostramos que a riqueza de Chrysomelidae depende da área e da estrutura do habitat em remanescentes de floresta semidecidual. Realizamos amostragens com armadilhas Malaise em 16 remanescentes florestais entre agosto de 2012 e março de 2013. Para caracterizar o habitat, medimos a área, a heterogeneidade estrutural do sub-bosque, a cobertura e a altura do dossel. Estas variáveis foram utilizadas em uma análise de caminhos para determinar seus efeitos diretos e indiretos na riqueza de crisomelídeos. Capturamos 450 espécimes de 99 espécies e cinco subfamílias. A área total e a heterogeneidade do sub-bosque apresentaram um efeito positivo sobre a riqueza de espécies, enquanto a cobertura do dossel exerceu efeito direto negativo. A altura do dossel apresentou apenas efeito indireto e negativo sobre a riqueza de crisomelídeos. Em fragmentos com maior área e mais espaços abertos, provavelmente a abundância e a riqueza de plantas tendem a serem maiores, favorecendo a coexistência de muitas espécies de Chrysomelidae.

ABSTRACT The total area of a habitat patch can increase the local species richness both directly (through balance between immigration and extinction) and indirectly (by increasing the habitat heterogeneity and/or as an effect of sample effort). More heterogeneous environments present a wider variety of resources and conditions, allowing species to coexist through niche differentiation. This study shows that the diversity of Chrysomelidae depends on the area and habitat structure of semideciduous forest remnants. We sampled 16 remnants with Malaise traps in August 2012 to March 2013. In order to characterize the habitat, the area, structural heterogeneity of the understory, coverage and canopy height were measured. These variables were used in a path analysis to determine their direct and indirect effects on leaf beetle diversity. A total of 450 specimens from 99 species and five subfamilies were captured. The total area and the understory heterogeneity presented a positive effect on species richness, while canopy cover exerted a negative one. The canopy height only had a negative and indirect effect on leaf beetle richness. In such fragments with more area and more open spaces, plant abundance and richness tend to be higher and favor the coexistence of many Chrysomelidae species.

RESUMO Os besouros apresentam grande diversidade taxonômica e funcional, no entanto, para a Região Nordeste, especialmente para a porção com vegetação de Caatinga, o conhecimento da fauna de Coleoptera é muito restrito. Por se tratar de uma região com grande diversidade de paisagens, torna-se necessário conhecer a coleopterofauna que ocorre nas diferentes fitofisionomias, buscando com isso abranger a variabilidade espacial encontrada nessa região xérica. Diante disso, o objetivo deste estudo foi realizar um levantamento das espécies de besouros no Semiárido paraibano. As coletas foram realizadas semanalmente durante quatro anos (2009-2013) utilizando uma armadilha Malaise por fitofisionomia, sendo amostrada uma área com vegetação xerófila e outra com mata ciliar. Foram coletados 6.567 indivíduos pertencentes a 383 espécies e 42 famílias de Coleoptera. Chrysomelidae (78 spp.), Curculionidae (57 spp.) e Cerambycidae (28 spp.) foram as famílias mais ricas. Em relação às mais abundantes, Chrysomelidae (30,4% dos indivíduos), Curculionidae (8,3%) e Tenebrionidae (7,7%) se destacaram. Foi verificado um elevado número de singletons e doubletons, apesar do prolongado período amostral, indicando que deve haver ainda muitas espécies a serem registradas na área de estudos. Nossos resultados demonstram uma rica fauna de besouros na região semiárida estudada e fornece uma lista de besouros de ocorrência no Semiárido paraibano, com novos registros de espécies para o estado e contribui assim com o conhecimento da diversidade de Coleoptera no Nordeste do Brasil.

ABSTRACT The beetles present great taxonomic and functional diversity; however, in the Northeast region of Brazil, especially in the semiarid Caatinga region, the knowledge on the Coleoptera fauna is very restricted. Because the Caatinga presents different landscapes, it is important to survey the coleopterofauna in the different phytophysiognomies, seeking to encompass a spatial variability found in this xeric region. Therefore, the objective of this study was to perform a survey of beetles in the semiarid region of Paraíba state, Northeast Brazil. We collected weekly during four years (2009-2013) using Malaise traps in two phytophysiognomies, an area with xerophytic vegetation and another with riparian forest. A total of 6,567 individuals belonging to 383 species and 42 families of Coleoptera were sampled. Chrysomelidae (78 spp.), Curculionidae (57 spp.), and Cerambycidae (28 spp.) had a higher richness, while Chrysomelidae (30.4% of individuals), Curculionidae (8.3%), and Tenebrionidae (7.7%) were the most abundant. A large number of singletons and doubletons were collected despite the long sampling period, indicating that there must be much more species to be recorded. Our results demonstrate a rich fauna of beetles in the studied region. We provide a list of occurring beetles with new records of species for the Paraíba state and thus contribute to the knowledge of the diversity of the Coleoptera in the Northeast Brazil.