Abstract The Cañón del Sumidero National Park (PNCS) is a priority area for conservation, but there are few studies on its fauna, which evidences the need for further basic studies to produce adequate knowledge on its biodiversity. This study aimed to determine dung beetle assemblages temporal distribution, trophic preference, and daily activity patterns. We conducted samplings using baited pitfall traps in a PNCS tropical sub deciduous forest remnant, during the dry and rainy seasons between 2014 and 2015. We captured a total of 863 individuals of 20 species, 12 genera, and five tribes of Scarabaeinae. Estimators suggest that we obtained high faunistic representation (> 80%), but species richness is low compared to other regional studies. The community was characterized by a high number of rare species and few dominant species. We captured the greatest richness and abundance during rainy months, however, species composition between seasons did not differ significantly. Trophic preference was mainly generalist and we considered only four species as specialists to tapir dung. We observed a clear segregation between activity hours. Nevertheless, we determined only nine species as specialists (six nocturnal and three diurnal) and two others had generalist habits. The low diversity we found could be influenced by the constant pressure of the urban area and non-native species within the park, which alter the dung beetle assemblages. However, performing samplings for longer periods and using a wider range of resources would help us obtain more robust results and better understand species distribution patterns.

ABSTRACT: The objective of this work was to analyze the diversity of mantids in four localities of the Selva El Ocote Biosphere Reserve: a) Emilio Rabasa, b) Veinte Casas, c) Nuevo San Juan Chamula, and d) San Joaquín El Progreso, grouping them in sites of conservation (a, b) and disturbed sites (c, d). Eight field trips of five days each one were made, divided into the seasons with and without rain precipitation, from February to August 2016. The fieldwork of mantids was done using light traps (black and white), in addition to direct manual capture. In total, 38 individuals were captured, five genera and seven species within three families. In addition, four new records of these insects were made for Chiapas (17 in total), which represents 23.6% of the known mantids in the country. The conservation sites presented high diversity, while the localities with more shared species were Veinte Casas and Nuevo San Juan Chamula. In April and July more mantids were collected compared to the other dates. The contribution of ecological-taxonomic data in this study is of importance to enrich the knowledge of this group of insects.

RESUMEN: Este trabajo tuvo como objetivo analizar la diversidad de mántidos en cuatro localidades de la Reserva de la Biósfera Selva El Ocote: a) Emilio Rabasa, b) Veinte Casas, c) Nuevo San Juan Chamula y d) San Joaquín El Progreso, agrupándolos en sitios de conservación (a, b) y sitios perturbados (c, d). Se realizaron ocho salidas de campo de cinco días de duración cada una, divididas en las estaciones con precipitación pluvial y sin ella, de febrero a agosto de 2016. La recolecta de mántidos se efectuó usando trampas de luz (negra y blanca), además de colecta manual directa. En total se capturaron 38 individuos, cinco géneros y siete especies de tres familias. Con ello, se realizaron cuatro nuevos registros de estos insectos para Chiapas (17 en total), lo que representó el 23.6% de los mántidos conocidos en el país. Los sitios de conservación presentaron mayor diversidad, mientras que las localidades con más especies compartidas fueron Veinte Casas y Nuevo San Juan Chamula. En abril y julio se recolectaron más mántidos con respecto a las otras fechas de recolecta. La aportación de datos ecológicos-taxonómicos en este estudio es de importancia para enriquecer el conocimiento de este grupo de insectos.