A new subgenus of the genus Strigoderma Burmeister, 1844, Costatergus Ramírez-Ponce Andalco-Cid subgen. nov., is proposed to accommodate S. costulipennis Bates, 1888, and S. tenebrosa Delgado Mora-Aguilar, 2012, as well as six other unpublished species, which are characterized by finely tumescent elytra with notable longitudinal ridges: Strigoderma (Costatergus) paucipunctata Andalco-Cid Ramírez-Ponce subgen. et sp. nov., S. (C.) julianii Andalco-Cid Ramírez-Ponce subgen. et sp. nov., S. (C.) grossipenis Andalco-Cid Ramírez-Ponce subgen. et sp. nov., S. (C.) uniungula Andalco-Cid Ramírez-Ponce subgen. et sp. nov., S. (C.) vulcanica Andalco-Cid Ramírez-Ponce subgen. et sp. nov., S. (C.) borealis Andalco-Cid Ramírez-Ponce subgen. et sp. nov. At the species level, the most important diagnostic characters are highlighted, concentrated in the shape of the inner protarsal claw, the punctation of the pronotum, the pattern of the elytral ridges and the simple genitalia. The subgenus Costatergus is endemic to Mexico, with a clear Typical Neotropical Distribution Pattern on the Mexican Pacific slope.
Andalco-Cid et al. (Wed,) studied this question.