Glaresis dentata 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 : 46-47

Glaresis dentata Gordon and Hanley , new species

Description. Male. Length 3.6 mm, width 1.8 mm; body form short, wide, slightly widened from elytral base to apical 1/3 ( Fig. 31A ). Color dark brown. Head with clypeal surface and frons dull, smooth, without reticulate ridges, with large, irregular tubercles throughout, tubercles separated by about a diameter, setae short, indistinct; vertex without basal carina, surface with dense carinae forming irregular reticulation, without tubercles or setae. Clypeal apex emarginate, with coarse, irregularly spaced tubercles, appearing somewhat serrate, lateral angles oblique, angulate ( Fig. 31B ). 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 rugose, surface with dense, short, tubercular, setae-bearing carinae, carina oval, setae decumbent, longer than carina; anterior and lateral pronotal margins not bordered, all margins crenulate. Elytra with surface dull, densely microreticulate; all striae 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. 31C ). Metasternum long, dull, finely, densely microreticulate, median surface not tuberculate medially, remainder of surface with pronounced, oval, dense tubercules, median area flat, with faint median carina extended anteriorly from apical keel more than 1/2 distance to base; metasternal groove wide, moderately deep, inner margin weakly tapered, outer margin abruptly ridged ( Fig. 31D ). Lateral protibial teeth not evenly spaced, 2nd and 3rd teeth close together. Mesotibia with 4 short, widely spaced spines laterally, strongly projecting at apex, tibial projection apically acute ( Fig. 31D ). Posterior metatrochanteral margin appearing serrate, with coarse row of tubercles on surface of posterior flange, second tubercle in from base pronounced, large, tooth-like; posterosuperior surface of metatrochanter with single large tooth, tooth not visible directly in ventral view (Fig E, F). Metafemoral surface with closely spaced, elongate, setae-bearing tubercles, microreticulate; width to length ratio 1.0:1.6, with wide flange on anterior margin, posterior margin with projecting tooth next to trochanter, posterior flange with series of nonprojecting tubercles on surface ( Fig. 31E ); posterosuperior margin without teeth. Metatibia narrow at base, abruptly widened before apex, surface entirely, strongly microreticulate, lateral margin with broad, laterally serrate flange, lateral teeth small, weakly projecting, uniformly, closely spaced, equal in size, without posteromedian lateral projection, medially with uniform row of small, highly raised, closely spaced round tubercles, inner margin smooth, pubescent ( Fig. 31G ). Apex of 5th female abdominal ventrite broadly, strongly emarginate medially.

Female. Unknown.

Variation. Holotype only.

Type material. Holotype female: Guatemala. Guatemala, Yepocapa , 21-IV-48, HDalmat ( USNM).

Remarks. Glaresis dentata is distinguished by the heavily tuberculate surface of clypeus and frons; tubercular, oval carinae on pronotum and metasternum with setae shorter than carina; posterior metatrochanteral margin with pronounced, tooth-like tubercle near trochanteral base; small, projecting tooth on posterior metafemoral margin; and wide flange on lateral metatibial margin serrate with small teeth, lacking posteromedian lateral projection.

The holotype specimen is a unique female. This specimen and the following species from Costa Rica are the southernmost species of Glaresis known north of South America.

Etymology. The specific name is the Latin dentatus, meaning tooth or pointed, referring to the armature on posterior margins of metatrochanter and metafemur

Figures

Figures 31A-31G. Glaresis dentata, new species. A) Habitus view. B) Clypeus and head surface. C) Elytral striae. D) Metasternum and mesotibia. E) Metafemur and trochanter, dorsal view. F) Metafemur and trochanter, ventral view. G) Metatibia, ventral view.