Monographic revision of the genus Aegidinus Arrow (1904) and generic phylogeny of the world Orphninae (Coleoptera: Scarabaeidae: Orphninae). Author Colby, Julia text Insecta Mundi 2009 2009-05-08 2009 76 1 41 journal article 10.5281/zenodo.5352584 1942-1354 5352584 Aegidinus unicus Colby , new species Fig. 76 , 93 Type Material . Holotype female at UNSM labeled: a) “ Brazil , Sinop., // Mato Grosso ,// X.1974 ,// M. Alvarenga ” (printed and handwritten on a rectangular label)/ b) my handwritten holotype label. Type locality. Brazil , Mato Grosso , Sinop. Description. Holotype female . Length 9.4 mm ; 5.2 mm . Color : Head, elytra, legs, and venter reddish brown. Pronotum piceous. Head : Frons and clypeus punctate to rugopunctate; punctures dense, moderate in size. Frontoclypeal suture effaced. Anterior margin of clypeus with marginal bead. Pronotum : Surface punctate; punctures moderate to dense, large, concentrated on sides. Basal margin with bead and row of punctures, both obsolete medially. Short, feebly impressed, median sulcus present just anterior to basal margin. Disc with punctate, ovate depression; punctures dense, moderate to large, occasionally ovate. Anterior margin with median boss. Elytra : Punctures of striae elongate, vermiform, occasionally S or V-shaped at base. Stria 1 obsolete at base. Lateral margin adjacent to humerus with 7 (left) or 9 (right) setose crenulations. Genitalia : Fig. 76 . Diagnosis. This species is best distinguished from other species in the genus by the form of the female genitalia. The spinulous bulb ( Fig. 76 ) present on interior margin of the superior plate is unique to this species. No males are known for this species. Etymology. From the Latin “ unicus ” meaning only or singular, which refers both to the singular appearance of the female genitalia, and that this species is known from only one specimen . Distribution (Fig. 93). Brazil. One specimen at UNSM. BRAZIL (1): Mato Grosso : Sinop (1). Temporal Distribution. October Natural History. Nothing is known about the natural history of this species. Remarks. This species is known only from one specimen . The sulcus described in this specimen could be variably expressed in other specimens of this species.