Systematic revision of Gonaphodiellus taxa, with description of two new genera and fourteen new species (Coleoptera: Scarabaeidae: Aphodiinae) Author Dellacasa, Marco Museo di Storia Naturale e del Territorio Università di Pisa Via Roma, 79 I- 56011 Calci (Pisa), Italy dellacasa@museo.unipi.it Author Dellacasa, Giovanni Via Talamone 31 / 19 I- 16127 Genova, Italy dellacasag@alice.it Author Gordon, Robert D. Northern Plains Entomology P. O. Box 65 Willow City, ND 58384 USA rdgordon@utma.com text Insecta Mundi 2012 2012-04-06 2012 230 1 41 journal article 55533 10.5281/zenodo.5174222 b0a0b4e7-7c0d-4b51-9a59-156975677df7 1942-1354 5174222 Gonaphodiellus arcanus new species ( Fig. 1-5 ) Type locality. Chiquihuite env., 15°05’41.0’’N – 092°06’04.0’’W , m 2060, Chiapas , Mexico . Type repository. Dellacasa Collection, Genoa, Italy . Description. Length 3.5-4.0 mm; oval, convex, shiny, glabrous. Piceous; clypeal margin, anterior angles of pronotum and elytral apex brownish-yellow; elytra with yellowish round spots on preapical declivity; legs pale brown; antennal club dirty testaceous. Head with epistome feebly gibbous on disc, evenly, not closely punctured throughout, punctation on disc only less superficial and sparser; clypeus subtruncate anteriorly, widely round at sides, rather thickly bordered, edge slightly reflexed, glabrous; genae obtuse, almost imperceptibly ciliate, protruding from the eyes; frontal suture almost obsolete; front finely, sparsely, somewhat irregularly punctured. Pronotum transverse, moderately convex, dually somewhat irregularly punctured; large punctures, twice larger than small ones, denser and closer on sides, lacking medially; small punctures rather regularly, not closely scattered throughout; lateral margins feebly arcuate, slightly inwardly sinuate before hind angles, finely bordered, edge glabrous; hind angles obliquely truncate, truncation inwardly feebly sinuate; base very slightly bisinuate. Scutellum almost flat, superficially alutaceous, with few sparse irregular punctures toward base. Elytra rather shortly oval, convex, strongly denticulate at shoulder, finely striate; striae rather deeply, not closely punctured, subcrenulate; interstriae moderately convex, superficially alutaceous, nearly imperceptibly and sparsely punctured. Hind tibiae upper spur shorter than first tarsal segment; first tarsal segment as long as following four segments combined. Male: shape relatively less broad and more convex; pronotal punctation more superficial and sparse mainly medially; metasternal plate with median longitudinal groove distinct; aedeagus Fig. 4-5 . Female: shape relatively broader and less convex; pronotal punctation coarser and denser medially; metasternal plate with median longitudinal groove very superficial. Type material. GUATEMALA : Quezalten , 14.2 Km SW Zunil , m 1340, 21.VI.1993 , leg. F. Génier , human feces ( 1 female paratype , CNCI ) ; MEXICO : Chiapas : Chiquihuite env., 15°05’41.0’’N – 092°06’04.0’’W ; m 2060, 23.VI.2007 ; leg. Dellacasa M. & Fresi C. ( holotype male , allotype and 3 female paratypes ; DCGI ) . Distribution. Guatemala , Mexico ( Chiapas ). Etymology. Named after the Latin word arcanus [= hidden]. Bionomics. All the specimens of the type series were collected in June.