Glaresis limbata Gordon and Hanley, 2014

Gordon, Robert D. & Hanley, Guy A., 2014, Systematic revision of American Glaresidae (Coleoptera: Scarabaeoidea), Insecta Mundi 2014 (333), pp. 1-91 : 50-51

Glaresis limbata Gordon and Hanley , new species

Description. Female. Length 3.0 mm, width 1.5 mm; body form short, wide, slightly widened from elytral base to apical 1/3 ( Fig. 35A ). Color dark brown. Head with clypeal surface and anteromedian 1/3 of frons dull, densely, strongly rugose, both clypeus and frons with small, indistinct, scattered punctures, posterior portion of frons and vertex feebly shiny; vertex with small ridges forming an indistinct reticulate sculpture, setae short, indistinct. Clypeal apex emarginate, with small, evenly spaced tubercles, appearing somewhat serrate, lateral angles oblique, angulate ( Fig. 35B ). Mandible pair symmetrical; mesal tooth strong; lateral prominence strong, pronounced; outer margin slightly, abruptly rounded. Pronotum with deep, long, transverse fovea in anterior 1/4 extended completely across pronotum, small slightly transverse fovea on each side of middle in anterior 1/2, wide, deep fovea on each side medially near lateral margin, deep central furrow extended from base to transverse furrow; surface densely rug- ose, surface with sparse, short, slightly irregular, setae-bearing carinae, setae about 1/2 length of carinae ( Fig. 35E ); anterior and lateral pronotal margins crenulate, not bordered. Elytra with surface shiny; all striae smooth, strongly carinate, carinae appearing continuous but narrowly interrupted adjacent to space between interval punctures, each carinal segment bearing an apical seta about 1/2 length of segment; intervals with deep, slightly rectangular punctures ( Fig. 35E ). Metasternum long, dull, finely, densely microreticulate, median surface not tuberculate medially, most of remaining surface with short, elongate tubercules, median area flat, without median carina; metasternal groove wide, shallow, inner margin weakly tapered, outer margin weakly ridged ( Fig. 35D ). Lateral protibial teeth not evenly spaced, 2nd and 3rd teeth close together. Mesotibia with 5 short, closely spaced spines in anterior 1/2 of posterolateral emargination, tibia strongly projecting at apex, projection with acute apex. Posterior metatrochanteral margin smooth, with indistinct row of tubercles on surface of posterior flange; posterosuperior surface of metatrochanter with single large tooth, tooth not visible directly in ventral view ( Fig. 35C ). Metafemoral surface densely, strongly microreticulate, with closely spaced, elongate, setae-bearing tubercles; width to length ratio 1.0:1.6, with wide flange on anterior margin, posterior margin without teeth; posterosuperior margin without teeth. Metatibia narrow at base, abruptly widened before apex, surface entirely, strongly microreticulate, lateral margin with broad, laterally serrate flange, without posteromedian lateral projection, medially with uniform row of small, widely spaced, nearly round tubercles, inner margin smooth, pubescent ( Fig. 35F ). Apex of 5th abdominal ventrite nearly truncate, indistinctly emarginate medially.

Variation. Holotype only.

Male. Unknown.

Type material. Holotype female: Mexico. Coahuila: 12 mi. no. Hermanas , Coah., MEX, VIII 11 1959 ( USNM).

Remarks. Glaresis limbata is distinguished from all other known species in this subgroup by the dull, dense, strongly rugose clypeal surface and medioanterior portion of frons; widely spaced pronotal carinae; and smooth elytral surface completely lacking microreticulation.

The holotype is a unique female.

Etymology. The species name is the Latin limbata , meaning border, referring to the well defined, lateral flange of the metatibia.

Figures

Figures 35A-35F. Glaresis limbata, new species. A) Habitus view. B) Clypeus and head surface. C) Metatrochanter with teeth indicated. D) Metasternum. E) Pronotal surface and elytra. F) Metaleg, dorsal view.