Major male Aegidinus sp.	Minor male Aegidinus sp.
Female Aegidinus sp.
Photos by: Julia Colby
Distribution:Neotropical realm. Trinidad, Colombia, Venezuela, Guyana, Ecuador, Peru, Brazil, Bolivia.
Description: Length 7-12 mm. Color brownish red to reddish brown. Both sexes with exerted, semicircular labrum and external, lateral lobe on mandibles. Major males with medial horn on anterior border of clypeus; females without horn. Anterior margin of pronotum (males) with slightly transverse, median tubercle (may be produced into horn) or not. Pronotum with central fovea, each basolateral edge raised into carina or low, rounded tumosity in males.
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Biology: Life history is unknown.

Larvae: The larval stage is unknown.

Revision or Synopsis:
Paulian, R.1984. Les Orphnidae Américains (Coléoptères, Scarabaeiodea). Annales de la Société Entomologique de France (N.S) 20:65-92.

Composition: 3 species

Species:
Aegidinus candezei (Preudhomme de Borre, 1886)
Aegidinus brasiliensis Arrow, 1904
Aegidinus guianensis (Westwood, 1846)

References:
Arrow, G. J. 1904. Sound-production in the lamellicorn beetles. Transactions of the Entomological Society of London 1904:709-750.

Arrow, G. J. 1912.  Scarabaeidae: Pachypodinae, Pleocominae. Aclopinae. Glaphyrinae, Ochodaeinae, Orphninae, Idiostominae, Hybosorinae, Dynamopinae, Acanthocerinae, Troginae. Coleopterorum Catalogus pars 43. W. Junk, Berlin. 66 pp.

Paulian, R.1984. Les Orphnidae Américains (Coléoptères, Scarabaeiodea). Annales de la Société Entomologique de France (N.S) 20:65-92.

Preudhomme de Borre, A. 1886. Liste des lamellicorns laparostictiques recueillis par feu Camille van Volxem pendant son voyage au Brésil at a la Plata en 1872 suivie de la description de dix huit espèces nouvelles et un genre nouveau. Annales de la Société Entomologique de Belgique 30:103-120.

Westwood, J. O. 1846. On the lamellicorn beetles which possess exserted mandibles and labrum, and 10 jointed antennæ. Transactions of the Entomological Society of London 4:155-180.