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Abstract
Horridocalia delislei Endrödi is an endemic Dynastinae species of the Biogeographic Chocó region of Colombia, very rare in collections and little known in terms of its biology. That's the reason why through this research it was proposed to provide new data of its distribution, to describe again the adult males and to describe the females for the first time. This was achieved through field collections, literature reviews and visits to national collections. Six specimens (5 ♂ ♂, 1 ♀) were collected in forest areas in the San Juan River basin (Chocó), Calima andDagua river basins (Valle).The males are allometric, thus some secondary sexual characters vary notably (cephalic and thoracic horns, prothorax, etc.), being included the prosternal process and the ocular canthus for the first time among this group of sexual characters for the Dynastinae Agaocephalini. Adults are nocturnal, frugivorous, they were observed as very vigorous and they stridulate when manipulated.
References
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