We present nine new records for dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae) for the department of Chocó (Colombia): Ateuchus aeneomicans, Canthon juvencus, C. cyanellus, Onthophagus coscineus, O. marginicollis, Sulcophanaeus miyashitai metallescens, Ateuchus candezei, Dichotomius favi and Uroxys platypyga also the last three being new records for Colombia, as well as expand the distribution of the same to South America.
Resumen. Se presentan redescripciones de Dichotomius camposeabrai Martínez, 1974 y D. nemoricola (Pereira, 1942) que incluyen la descripción de la hembra de la primera especie y del macho de la segunda, hasta ahora desconocidos. Para cada especie se realizaron ilustraciones del habitus del macho, del órgano genital masculino y de los escleritos del saco interno, así como de la cabeza y pronoto de las hembras. Se proporcionan datos sobre la distribución geográfica y algunos comentarios de las especies. Además, se propone y discute la transferencia de D. camposeabrai al grupo bitiensis, dadas las similitudes de la morfología externa y del órgano genital masculino que presenta con D. nemoricola. Palabras clave: órgano genital masculino, escleritos del saco interno, lamela copulatriz, grupo bitiensis.
Ecological communities of tropical regions respond to habitat configuration, being negatively affected by anthropogenic habitats. In the tropics, mountainous highland landscapes sustain ecological communities with contrasting responses to habitat transformation. This study assessed the effect of different habitats under different disturbance regimes on the dung beetle assemblage that inhabits a mountainous Andean landscape in Colombia. The habitat types surveyed were oak forest cores (low intervention), forest edges (medium intervention), and pastures (high intervention). A total of 3,810 dung beetles from ten species were collected. Dung beetle diversity was affected by habitat type, and forest cores and forest edges had higher diversity than pastures. Besides, each habitat type was characterized by a distinct dung beetle assemblage, with pastures showing the highest heterogeneity in the dung beetle assemblage. In conclusion, our study suggests that the dung beetles of a portion of Colombian Andean landscapes are sensitive to shifts of habitat quality. The higher dung beetle diversity in forested habitats indicates that pastures comprise limiting environments for their assemblages at this Andean region.
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