Agrilinellus, Dellacasa & Dellacasa & Gordon, 2008

Dellacasa, Marco, Dellacasa, Giovanni & Gordon, Robert D., 2008, Agrilinellus, new genus and four new species of Mexican Aphodiini (Scarabaeoidea: Scarabaeidae: Aphodiinae), Insecta Mundi 2008 (53), pp. 1-16 : 2-4

Agrilinellus new genus

Type species. Aphodius azteca Harold, 1863 , here designated.

Diagnosis. Small species (length 3.0- 5.5 mm), oval or moderately elongate, convex, moderately shiny or almost dull, glabrous or with elytra more or less widely pubescent. Blackish, head and pronotum mostly black; elytra variable, sometimes black, reddish or with yellowish spots. Head with epistome moderately convex, coarsely, regularly evenly punctured; clypeus weakly sinuate at middle, subangulate or rounded at sides, bordered, edge glabrous; genae obtusely rounded, ciliate, more or less strongly protruding more than eyes; frontal suture at most faintly trigibbous; frons evenly, coarsely punctured. Pronotum transverse, moderately convex, dually and more or less densely punctured or almost regularly evenly punctured; hind angles obtusely rounded; basal margin bordered, border rarely interrupted at middle. Scutellum small, triangular. Elytra oval or subcylindrical; humerus denticulate or not; striae extremely fine, superficial and almost impunctate or deep, distinctly punctured, more or less strongly crenulate; interstices feebly convex or flat, sparsely finely or coarsely and more or less densely punctured, sometimes almost imperceptibly pubescent on preapical declivity only or more or less widely pubescent throughout. Fore tibiae distally tridentate and proximally not serrulate at outer margin; upper surface smooth. Hind tibiae with strong transverse carinae on outer face; apically fimbriate with short and equal spinules except in A. antonioreyi in which they are alternately unequal. Pygidium coarsely regularly punctured, apical third with short recumbent pubescence; apical margin with few elongate, straight setae. Sexual dimorphism shown in males by frontal suture somewhat more distinct and gibbose, pronotum not narrowed anteriorly, more convex and less densely punctured on disc; metasternal plate concave and laterally pubescent. Aedeagus with parameres short, almost as long as half of tegmen. Epipharynx rounded at sides, weakly bisinuate at front margin; epitorma campaniform; corypha not protruding beyond front margin and with clump of stout apical spiculae, the two central distinctly longer than others; pedia more or less widely and densely pubescent, mixed several stout chaetae subserially arranged; chaetopariae dense, moderately elongate.

Distribution. Mexico, Guatemala, El Salvador.

Etymology. The generic name (gender masculine) is derived from the genus name Agrilinus Mulsant and Rey, 1870 .