Resumen Las especies mexicanas de Belonuchus Nordmann se colectan con cierta frecuencia en sustratos con materia orgánica en descomposición o usando trampas con este tipo de cebos y se les considera depredadoras de otros insectos, como larvas de moscas. Se tienen contribuciones recientes sobre su taxonomía; sin embargo, aún hacen falta más estudios al respecto. En este trabajo se describen 2 especies nuevas de Belonuchus procedentes de varios estados de México, las cuales fueron localizadas en el material entomológico de la Colección Nacional de Insectos de la UNAM. Las descripciones se acompañan con imágenes que ayudan al reconocimiento de las especies y se presenta una clave modificada que facilita su identificación. Además, se analizaron ejemplares de algunas especies ya conocidas que representan varios primeros registros estatales. Todo lo anterior ha derivado en el incremento de la riqueza nacional de especies de Belonuchus y en un conocimiento más completo sobre su taxonomía y distribución geográfica.

Abstract The Mexican species of Belonuchus Nordmann are collected with some frequency in substrates with decomposing organic matter or using traps with this type of bait and are considered predators of other insects, such as fly larvae. There are recent contributions on their taxonomy; however, more studies are still needed in this regard. This paper describes 2 new species of Belonuchus from several states in Mexico, which were located in the entomological material of the National Insect Collection, UNAM. Descriptions are accompanied by images that help to recognize the species and a modified key is presented to facilitate their identification. In addition, several specimens of some already known species, which represent first state records, were analyzed. All of the above has resulted in an increase in the national richness of Belonuchus species and a more complete knowledge of its taxonomy and geographic distribution.

Abstract In this work the taxonomic composition, richness and abundance of beetles sampled by pitfall traps between 2006 and 2008 in the Pascua and Bravo river basins are given. The sampling were seasonal in three vegetation formations (peat bog, forest and secondary forest). A total of 833 individuals belonging to 15 families, 41 genera and 49 species were collected. The most diverse families were Carabidae, Staphylinidae and Curculionidae; Ceroglossus suturalis, Ceroglossus buqueti, Ceroglossus chilensis, Creobius eydouxii and Cascellius gravesii were the most abundant species. Forest, and peat bog presented the greatest specific richness and abundance of beetles, probably due because they are the dominant vegetation formations in both basins. Similar results obtained in summer could be explained by better weather conditions that would favor the phenological changes that regulate the life cycles of the insects that inhabit there. Finally, the presence of monotypic or little diversified genera is typical of the Magellanic Paramo biogeographic province, with species adapted to living in humid and cold environments.

Resumen En este trabajo se entrega la composición taxonómica, riqueza y abundancia de coleópteros muestreados mediante trampas de intercepción entre 2006 y 2008 en las cuencas de los ríos Pascua y Bravo, Región de Aysén, Chile. Los muestreos fueron estacionales en tres formaciones vegetacionales (turbera, bosque y renoval). Se capturó un total de 833 individuos pertenecientes a 15 familias, 41 géneros y 49 especies. Las familias más diversas fueron Carabidae, Staphylinidae y Curculionidae, y las especies más abundantes fueron Ceroglossus suturalis, Ceroglossus buqueti, Ceroglossus chilensis, Creobius eydouxii y Cascellius gravesii. Bosque y turbera presentaron los mayores valores en riqueza y abundancia de coléopteros, debido probablemente a que son las formaciones vegetacionales dominantes en ambas cuencas. Resultados similares obtenidos en verano podrían explicarse por condiciones climáticas más benignas que favorecerían los cambios fenológicos que regulan los ciclos de vida de los insectos que allí habitan. Finalmente, la presencia de géneros monotípicos o poco diversificados es propia de la provincia biogeogràfica del Páramo Magallánico, con especies adaptadas a vivir en ambientes húmedos y fríos.

Abstract A study of the muscicolous communities of beetles is carried out in central Chile, around 33°S, including the Andean foothills, the central valley, the coastal mountain range and the coastal plain. Four sampling locations were defined, each one representative of preandean, central valley, costal range, and coastal plain and located in protected areas: Río Clarillo National Park, Laguna Carén Park, La Campana National Park and Lago Peñuelas National Reserve. In each of the locations, six interception traps for epigeans insects were installed in association to terrestrial moss meadows. The traps remained in operation from July to November 2017, trying to cover the biological activity cycle of the mosses. 2,115 beetle specimens were captured, represented by 29 families and 126 species. Eleven families were the most abundant and frequents in the moss communities studied: Byrrhidae, Carabidae, Corylophidae, Cryptophagidae, Curculionidae, Hybosoridae, Latridiidae, Leiodidae, Ptinidae, Staphylinidae, and Tenebrionidae. Byrrhidae species are recognized as strictly bryophilous. Species of Corylophidae, Cryptophagidae, some Curculionidae, Hybosoridae, Latridiidae, Leiodidae, Ptinidae and Staphylinidae thrive in the moss, but can also be present in other environments. Although there is a general assemblage of muscicolous species, the different localities studied present differences in the composition of species that characterize them, probably due to their geographical location, vegetation type, and/or local climatic conditions. According to the above, the epigeans beetle fauna of central Chile contributes at the local level, with some complementary and accessory elements, to the studied muscicolous beetle assemblages.

Resumen Se efectuó un estudio de comunidades muscícolas de coleópteros en Chile central, en torno a los 33°S, incluyendo la precordillera andina, el valle central, la cordillera de la costa y la planicie litoral. Para ello se definieron cuatro localidades de muestreo representativas de esas zonas, cada una ubicada en un área protegida: Parque Nacional Río Clarillo, Parque Laguna Carén, Parque Nacional La Campana y Reserva Nacional Lago Peñuelas. En cada una de las localidades se instalaron seis trampas de intercepción de insectos epigeos, en relación a prados de musgos terrestres. Las trampas permanecieron funcionando desde julio hasta noviembre de 2017, tratando de cubrir el ciclo de actividad de los musgos. Se capturaron 2.115 ejemplares de coleópteros, representantes de 29 familias y 126 especies. Once familias fueron las más abundantes y constantes en las comunidades de musgo estudiadas: Byrrhidae, Carabidae, Corylophidae, Cryptophagidae, Curculionidae, Hybosoridae, Latridiidae, Leiodidae, Ptinidae, Staphylinidae y Tenebrionidae. Las especies de Byrrhidae son reconocidas como estrictamente briófilas. Especies de Corylophidae, Cryptophagidae, algunos Curculionidae, Hybosoridae, Latridiidae, Leiodidae, Ptinidae y Staphylinidae se desenvuelven en el musgo, pero pueden estar presentes también en otros ambientes. Si bien existe un ensamble general de especies muscícolas, las diferentes localidades estudiadas presentan diferencias en la composición de especies que las caracterizan, derivadas probablemente de su ubicación geográfica, entorno vegetacional y/o condiciones climáticas locales. Según lo anterior, la fauna de coleópteros epigeos de Chile central contribuye, a nivel local, con especies complementarias a ese ensamble.

Resumen Los hongos son parte de la dieta de larvas y adultos del orden Coleoptera; sin embargo, es un recurso que con poca frecuencia se utiliza como atrayente para la recolección de estos insectos. En este trabajo se analizaron los ensamblajes de escarabajos micetófilos en cuatro localidades ubicadas a lo largo de un gradiente altitudinal de la región central de Chiapas, México. Para el muestreo de escarabajos se utilizaron trampas de caída cebadas con el cuerpo fructífero del hongo Agaricus bisporus previamente fermentado. En total se capturaron 208 individuos que integran 27 especies de las familias Scarabaeidae (Scarabaeinae), Silphidae y Staphylinidae. La diversidad de especies fue baja en comparación con otros atrayentes utilizados para el muestreo de estos grupos de insectos, no obstante, se obtuvo una alta representatividad de especies. De manera general, la diversidad está relacionada con el incremento de la altitud, pero la respuesta fue diferente entre familias. Scarabaeinae estuvo mejor representada en los sitios de menor altitud, caso contrario ocurrió con Staphylinidae que predominó en los sitios de mayor altitud, esto permitió diferenciar tres comunidades de escarabajos a lo largo del gradiente (Dβ = 2.77). A pesar de la baja prevalencia de especies y sus abundancias, estos resultados indican que este tipo de atrayentes pueden ser utilizados por diversas especies y es probable que funcionen como una fuente alterna que permite segregar la competencia por la demanda y la repartición de alimento cuando los recursos preferidos son escasos. Ofrecer un número diverso de recursos alimentarios potenciales, permitiría establecer el espectro trófico de las especies de forma más realista y objetiva. Por lo tanto, este tipo de atrayentes pueden ser utilizados para la captura de escarabajos en los inventarios de biodiversidad permitiendo obtener resultados más precisos sobre la diversidad local de insectos.

Abstract Fungi are part of the diet of larvae and adults of the order Coleoptera; however, it is a resource that is infrequently used as an attractant for the collection of these insects. In this work, mycetophilous beetle assemblages were analyzed in four localities located along an altitudinal gradient in the central region of Chiapas, Mexico. Pitfall traps baited with the fruiting body of the fungus Agaricus bisporus previously fermented were used for beetle sampling. A total of 208 individuals comprising 27 species of the families Scarabaeidae (Scarabaeinae), Silphidae, and Staphylinidae were captured. Species diversity was low compared to other attractants used for sampling these insect groups, however, a high representativeness of species was obtained. In general, diversity is related to increasing altitude, but the response was different among families. Scarabaeinae was better represented in the lower altitude sites, the opposite case occurred with Staphylinidae that predominated in the higher altitude sites, this allowed differentiation of three beetle communities along the gradient (Dβ = 2.77). Despite the low prevalence of species and their abundances, these results indicate that these types of attractants can be used by diverse species and are likely to function as an alternate source to segregate demand competition and food partition when preferred resources are scarce. Offering a diverse number of potential food resources would allow to establish the trophic spectrum of species in a more realistic and objective way. Therefore, this type of attractant can be used to capture beetles in biodiversity inventories allowing to obtain more accurate results on local insect diversity.

Abstract Epigeic coleopteran species are linked by complex trophic webs and implicated in several ecosystem services for agriculture. Although there are reports of ground-dwelling Coleopterans inhabiting main extensive agroecosystems, their assemblages in horticultural crops in Argentina have been little explored. We examined the community structure of epigeal Coleoptera assemblages of Curculionidae, Carabidae, Staphylinidae and Coccinellidae species, in lettuce and tomato crops located in Northern Buenos Aires province, over a 3-year sampling period (2010 to 2013) by using pit-fall traps. Crop species and cycles, and phytosanitary measures (conventional and organic farming), were main factors considered as influencing the insect species composition, abundance and seasonal occurrence in the assemblages. Seventy coleopteran species were identified. The curculionids Ceutorhynchini sp. and Phyrdenus muriceus (Germar), the carabid Scarithes anthracinus Dejean, the coccinelid Eriopis connexa (Germar) and the staphylinids Aleochara sp. and Aleochara obscurus Bernhauer are the most common species in lettuce and tomato crops in the region studied. Especially the carabids, staphylinids and E. connexa are known act as natural enemies of several pests in the agroecosystems studied. Coleopteran assemblages found in lettuce differed from those associated to tomato crops, being the cropping season the main factor that influenced the community structure.

Abstract This study aimed to evaluate the abundance and diversity of Coleoptera in five land use systems (LUS) and the soil properties that explain the distribution of these organisms. Uses involved native forest (NF), Eucalyptus plantation (EP), perennial pasture (PA), integrated crop-livestock (ICL) and no-tillage (NT) in western Santa Catarina, Brazil. Coleopterans were sampled by the methods of pitfall traps and soil monoliths during the winter and summer. Regardless of the LUS, 1,441 individuals were captured, with Staphylinidae being the most representative family (~47%). The use of NF showed higher abundances of coleopterans. The land use systems PA, NT, and ICL obtained high values of diversity of Coleoptera families, depending on the method and season of collection. The distribution of families was influenced by the sampling season, and some soil properties such as biopores, water content and phosphorus can explain the variation of abundance among the LUS.

ABSTRACT The aim of this study was to characterize the leaf-litter entomofauna in degraded areas under restoration process with different restoration techniques, using the native forest as a reference and ecological indexes as parameters to select bioindicator groups. The study was conducted at “Serra do Itajaí” National Park (PNSI). The survey was conducted from winter/2014 to autumn/2016. The characterization of sampled communities was performed using identification, order, families and faunal indexes such as frequency, constancy and dominance. Overall, 11,241 insects from 57 taxonomic groups were collected in pitfall traps. The native forest showed the greatest richness observed. Groups classified as frequent, constant and dominant in all environments were the Formicidae family and Diptera Order. Significant differences were observed in the frequencies of Ptiliidae, Staphylinidae and Cicadellidae families and also Diptera Order. Coleoptera Ptiliidae, Staphylinidae families and Scolytinae subfamily showed potential as bioindicators of environmental quality at PNSI.

Abstract Viviparity is characterized by the retention of fertilized eggs in reproductive tract of the female. This condition is very common in vertebrates, but relatively rare in invertebrates, including insects. The present work presents a review on viviparity in Staphylinidae, with special attention on genus Corotoca Schiødte, 1853. The genus is composed by six termitophilous species with neotropical distribution, and together with Spirachtha Schiødte, 1853 are the only to genera with species confirmed as viviparous in the family. Also, information and discussion are presented on the life cycle of Corotoca species based on dissection of females in laboratory and field observations. During the dissection of females of four species of Corotoca we observed that each female carries three eggs at the same time. The embryos present asynchronous development: when one is located at apex of abdomen, the other two are at IV segment, on abdomen curvature. These observations are complementary with those obtained in field observation, when the female deposits a larva outside the nest, on the foraging trail of termite Constrictotermes cyphergaster (Silvestri, 1901). The strategy of Corotoca species focused on the immature as dispersing agent is derived and probably favor the fitness in relation to a hypothetical condition in which the adult is the dispersive agent.

ABSTRACT The avocado red mite, Oligonychus yothersi (McGregor) (Acari: Tetranychidae), is a polyphagous pest that causes damage to a wide range of plants. In Chile, is commonly found in avocado (Persea americana Mill.) orchards, and the plant damage is expressed as a reduction of photosynthetic activity in leaves, causing defoliation of trees under severe attack conditions. Oligotapygmaea (Solier) (Staphylinidae) and Parastethorus histrio (Chazeau) (Coccinellidae) micro-coleopteran predators are found on 'Hass' avocado orchards, infested by O. yothersi. This study investigated the role of volatile compounds released by avocado in response to O. yothersi infestation in the tritrophic interaction avocado-O. yothersi-O.pygmaea-P. histrio. Plant volatiles were collected from live plants by headspace technique on Porapak Q traps and analyzed by gas chromatography coupled to mass spectrometry (GC-MS). In the chemical analysis, several chemical groups were identified including terpenes, aromatic compounds, and green leaf volatiles. Eight chemical compounds were detected only in the infested plants volatile profile, and differences were observed in the emission of 10 compounds between infested and uninfested plants (P < 0.05). The behavioral responses of the insects to plant volatiles were evaluated in a choice-test using a Y-tube as olfactometer. Uninfested plant volatiles were significantly attractive to O. yothersi, while infested plants volatile extract repelled the mites. Two compounds, i?-limonene and (-pinene, elicit an attractant behavioral response from O. yothersi. Oligota pygmaea and P. histrio females registered a strong attraction to volatiles from infested plants, and the compounds (Z)-(-ocimene and methyl salicylate detected only in infested plant also were attractive to predators.

ABSTRACT We analyzed 117 specimens from eight Mexican states and 22 localities whose taxonomic identification was doubtful to assign them to Belonuchus ephippiatus or B. erythropterus. The goal of this paper is to analyze the most important characters reported in the literature to separate both species and decide if it is one or two entities. The analysis included the measurement of different parts of the body and the proportions between them, however, it was focused on the total body length, the number of punctures that form each of the two central rows of the pronotum, the aedeagus length and its proportion in relation to the body length, because they are the most important characters indicated in the literature that allow to separate the both species. The results showed that is not possible to distinguish the two species with any of the characters analyzed, combined or alone, so we proposed for the second time in the history of these species, that B. erythropterus is a junior synonym of B. ephippiatus. Aspects of the great morphological variation observed in B. ephippiatus, its geographic distribution and its biology are discussed. Moreover, a new species of the same species group was described and it was distinguished from B. ephippiatus based on morphological characters. Finally, we are providing schemes and photographs that help its recognition.

RESUMEN Se analizaron 117 ejemplares procedentes de ocho estados y 22 localidades de México cuya identificación taxonómica era dudosa para asignarlos a Belonuchus ephippiatus o B. erythropterus. La finalidad de este trabajo fue analizar los principales caracteres reportados en la literatura para separar a las dos especies mencionadas y decidir si se trata de una o dos entidades. El análisis incluyó la medición de diferentes partes del cuerpo y las proporciones entre ellas, pero éste se focalizó en la longitud total del cuerpo, el número de puntuaciones que forman cada una de las dos hileras centrales del pronoto, la longitud del edéago y su proporción con relación a la longitud del cuerpo, ya que son los principales caracteres indicados en la literatura que permiten separar a las dos especies. Los resultados muestran que no es posible distinguir dos especies con ninguno de los caracteres analizados, combinados o solos, por lo que se propuso por segunda ocasión en la historia de estas especies, que B. erythropterus es sinónimo junior de B. ephippiatus. Se discuten aspectos sobre la enorme variación morfológica observada en B. ephippiatus, su distribución geográfica y su biología. Además, se describe una especie nueva del mismo grupo de especies y se distingue de B. ephippiatus con base en caracteres morfológicos. Finalmente, se aportan esquemas y fotografías que ayudan a su reconocimiento.

ABSTRACT Despite the economic importance of lettuce, no studies have examined the diversity of species associated with this crop that could contribute to the development of an ecological management of phytophagous arthropods and mollusks. This study was aimed at determining the predominant species of arthropods and mollusks in two lettuce cultivars (curly-leaf Veronica and smooth-leaf Elisa). A total of 9,638 specimens of arthropods and mollusks was collected and identified to 27 constant species, 17 classified as accessory and two as accidental species. Seven species of aphids were identified, with Nasonovia ribisnigri, Uroleucon sonchi, and Uroleucon ambrosiae as the most frequent, as well as three species of thrips, predominantly Caliothripsphaseoli and Frankliniella schultzei. Other phytophagous arthropods and mollusks occurred at frequencies below 10%. Among natural enemies, predators of the families Syrphidae (2.74%), Coccinellidae (1.66%), Staphylinidae (0.79%) and Carabidae (0.17%) and parasitoids of the order Hymenoptera (0.93%) were observed. Of the total specimens collected, 53.87% are considered phytophagous species, mostly aphids (40.82%), followed by thrips (11.35%). The aphid N. ribisnigri was the main pest species, as it forms colonies in the lettuce head and can spread plant viruses. Phytophagous pests preferred smooth over curly leaves.

RESUMEN A pesar de la importancia económica de la lechuga, no hay estudios que hayan analizado la diversidad de especies asociadas a este cultivo que podrían contribuir al manejo ecológico de los artrópodos fitófagos y moluscos. Este estudio tuvo como finalidad determinar las especies predominantes de artrópodos y moluscos en dos cultivares de lechuga (Veronica de hoja rizada y Elisa de hoja lisa). De un total de 9.638 ejemplares de artrópodos y moluscos se identificaron 27 especies comunes, 17 fueron clasificados como especies accesorias y dos especies, como accidentales. Se identificaron siete especies de áfidos, siendo Nasonovia ribisnigri, Uroleucon sonchi, Uroleucon ambrosiae, las más frecuentes. En trips se identificaron tres especies, siendo las más frecuentes Caliothrips phaseoli y Frankliniella schultzei. Otros artrópodos fitófagos y moluscos fueron identificados en frecuencias por debajo del 10%. Entre los enemigos naturales, se identificaron depredadores de las familias Syrphidae (2,74%), Coccinellidae (1,66%), Staphylinidae (0,79%) y Carabidae (0,17%) y parasitoides del orden Hymenoptera (0,93%). De las muestras totales recolectadas, 53.87% se consideran especies de fitófagos, principalmente áfidos (40.82%), seguido por trips (11,35%). El áfido N. ribisnigri fue la principal especie plaga ya que forma colonias en la cabeza de lechuga y puede propagar virus en las plantas. Los fitófagos prefieren las lechugas de hojas lisas por sobre las rizadas.

ABSTRACT Paederus fuscipes, a vector of Paederus dermatitis in most tropical and subtropical countries of the world have a high prevalence in human dwellings due to their positively phototaxic behaviour which has caused a tremendous impact on human health. In this paper, P. fuscipes dispersal flights were studied for two seasons of the rice cultivation phases in residential premises built close to rice field areas (≈32-60 m and 164 m) in mainland Penang, Malaysia. We examined the effects of different light illuminance, building floor level and their association with rice stages as a focal cause of P. fuscipes dispersion from the rice fields towards human dwellings. The present study showed a significant interaction between different light illuminances and rice cultivation phases in attracting P. fuscipes to disperse and invade human dwellings. The highest number of P. fuscipes was captured near the bright light. P. fuscipes flights increased in line with each floor level, and the highest captures took place at higher building floor levels (levels 2 and 3) compared to lower building floor levels (ground floor and level 1) of a three storey apartment in both rice seasons. This finding not only conveys a better understanding on P. fuscipes dispersal pattern, but also draws public attention on the occurrence of dermatitis linearis caused by the Paederus beetles.

Bernardo O'Higgins National Park (BONP) is the largest protected area in Chile and southern hemisphere. With over 3.5 million hectares, it has a complex continental and archipelagic topography with a mosaic of evergreen forests, coastal scrub and peatlands. Given the future of the Chilean environmental legislation, all protected areas will be re-evaluated according to scientific parameters. Therefore, and considering that insects are currently recognized by the Chilean law, we aim at providing information on the spatial distribution of beetles using pitfall traps in 20 sites associated with the park. We evaluate the effect of vegetation and type of environment (insular, continental) on taxonomic composition, richness, abundance and diversity of beetles. A total of 15 families, 33 genera and 38 species were recorded. Many of these represent monotypic groups. The most diverse families were Carabidae, Staphylinidae and Curculionidae. No significant effect of vegetation and type of environment on any community measurement was observed since the vegetation and sectors analyzed are part of a larger biogeographic unit. Additionally, we determined 11 species to the park, which are significantly associated among them. We discuss the importance of this kind of information to make biogeographical approaches.

El Parque Nacional Bernardo O'Higgins (PNBO), corresponde al área silvestre protegida más extensa de Chile y del Hemisferio Sur; con más de 3,5 millones de hectáreas presenta una compleja topografía continental e insular con un mosaico de bosques perennifolios, matorral costero y turberas. Considerando que los insectos son actualmente reconocidos por la legislación chilena, el objetivo fue entregar información de la distribución espacial de coleópteros capturados con trampas de intercepción en 20 sitios asociados al parque y evaluar el efecto que tiene la vegetación y tipo de ambiente (insular, continental) sobre la composición taxonómica, riqueza, abundancia y diversidad de los mismos. Se registró un total de 15 familias, 33 géneros y 38 especies, muchas de las cuales pertenecen a géneros monotípicos. Las familias más diversas fueron Carabidae, Curculionidae y Staphylinidae. No se evidenció efecto significativo del tipo de ambiente ni de la vegetación sobre ningún parámetro comunitario analizado; lo anterior respondería a que las formaciones vegetales y sitios investigados forman parte de una unidad biogeográfica mayor. Por otra parte, se determinó que 11 taxones se encuentran asociados significativamente. Se discute, la importancia de este tipo de información al momento de realizar aproximaciones biogeográficas.

Resumen: La lista de especies de coleópteros depositados en la Colección de Artrópodos de la Facultad de Estudios Superiores Iztacala (CAFESI), UNAM, incluye 10,277 especímenes, agrupados en cinco superfamilias, 15 familias, 41 subfamilias, 172 géneros y 570 especies, de las cuales 231 están identificadas nivel especie y de éstas, 339 a género y separadas a morfoespecie. Las familias Staphylinidae y Scarabaeidae representan el 87.7% de la riqueza y el 73% del total de especímenes. La colección alberga dos holotipos de Paederinae, y paratipos de tres especies de Paederinae y dos especies de Staphylininae (Staphylinidae). Tiene una cobertura geográfica regional, 96% de las especies y especímenes registrados provienen de nueve estados de la región centro-sur de México, principalmente del Estado de México con 54.7% de las especies y 41.6% de los especímenes, le siguen Morelos, Guerrero y Michoacán. Se incluyen especímenes de 11 especies de Paederinae provenientes de Argentina, Bolivia y Brasil. Del bosque tropical caducifolio provienen el 45% de las especies y el 26% de los ejemplares, mientras que el 30.8% de las especies y el 17.6% de los especímenes provienen de los bosques templados.

Abstract: The list of beetle species deposited at the Arhtropods Collection of the Facultad de Estudios Superiores Iztacala (CAFESI), UNAM, includes 10,277 specimens, grouped in five superfamilies, 15 families, 41 subfamilies, 172 genera and 570 species, of wich 231 are identified at species level and 339 at genus level and separated at morphspecies. The families Staphylinidae and Scarabaeidae represent 87.7% of the richness and 73% of the total specimens. The collection housed two holotypes of Paederinae, and paratypes of three species of Paederinae and two species of Staphylininae (Staphylinidae). It has a regional geographic coverage, 96% of the species and specimens recorded come from nine states of south central region of México, mainly from Estado de México with 54.7% of the species and 41.6% of the specimens, followed by Morelos, Guerrero and Michoacán. The collection also includes 61 specimens of 11 species of Paederinae coming from Argentina, Bolivia and Brazil. Forty five percent of the species and 26% of the specimens come from the tropical deciduous forest, while 30.8% of the species and 17.6% of the specimens come from the temperate forest.

Los bosques húmedos tropicales albergan una gran riqueza y diversidad de especies de estafilínidos. Sin embargo, en Colombia el conocimiento de esta diversidad es escaso y más en ecosistemas sobre la Cordillera Oriental. Este estudio registra la composición y estructura de los coleópteros estafilínidos en dos localidades del municipio de Santa María, en el departamento de Boyacá. Se utilizaron como métodos de colecta transectos compuestos por trampas de caída, tipo "pitfall", con diferentes cebos o atrayentes, además de cernido de hojarasca y colecta manual en un gradiente altitudinal entre los 1.000 y 1.400 msnm. En total se recolectaron 1.378 especímenes, agrupados en 179 morfoespecies, 56 géneros y 11 subfamilias, donde la subfamilia Aleocharinae registró gran parte de la abundancia (58,3%) mientras que en términos de riqueza Aleocharinae (32%), Staphylininae (17%) y Pselaphinae (16%) se encuentran dentro de las subfamilias mejor representadas. Los altos valores de diversidad en la Almenara y el Sendero Ecológico "Hiya Quye", contribuyen con la diversidad regional, además se encontraron diferencias significativas en términos de abundancia entre las dos localidades estudiadas. Las tasas de recambio de especies fueron altas, con una gran variación en la composición de estafilínidos a través del gradiente altitudinal en las localidades estudiadas, que se refleja en los bajos índices de similitud (entre 0,10 y 0,27). Géneros como Belonuchus, Philothalpus, Aleochara, Hoplandria, Atheta, Prionopedinus, Anotylus, Coproporus, Holotrochus, Trimicerus se encontraron distribuidos a lo largo del gradiente altitudinal estudiado.

Tropical rain forests contain a high species richness and diversity of rove beetles. However, in Colombia in general, knowledge of this diversity is scarce; and even more so in ecosystems on the Eastern Range. This study records the composition and structure of rove beetles in two municipalities of Santa Maria country, in the department of Boyacá. Pitfall traps baited with different organic matter, as well as leaf litter siftings and manual collection in an altitudinal gradient between 1,000 and 1,400 m.a.s.l were used to evaluate the species richness and diversity of these beetles. In total, 1,378 beetles were collected which were grouped into 179 morphospecies, 56 genera, and 11 subfamilies. Aleocharinae was the most abundant (58.3%), while, by overall species richness, Aleocharinae (32%), Staphylininae (17%), and Pselaphinae (16%) were the best represented. High levels of diversity in La Almenara and the "Hiya Quye" ecological trail contribute to regional diversity; however, significant differences in abundance were found between the two localities studied. Species turnover rates were high, with large variations in the composition of rove beetles throughout the altitudinal gradient in both localities studied reflected in a low index of similarity (between 0.17 and 0.27). Genera such as Belonuchus, Philothalpus, Aleochara, Hoplandria, Atheta, Prionopedinus, Anotylus, Coproporus, Holotrochus, and Trimicerus were found in the altitudinal gradient studied.