Glaresis thomasi Keller and Skelley, 2020

Keller, Oliver & Skelley, Paul E., 2020, New family record for the West Indies and two new species of Glaresis Erichson (Coleoptera: Scarabaeoidea: Glaresidae) from Hispaniola, Insecta Mundi 2020 (839), pp. 1-6 : 4-5

Glaresis thomasi Keller and Skelley , new species

Figures 7–12

Description. Male holotype. Length 3.6 mm, width 2.0 mm; body form elongate, slightly widened from elytral base to apical 1/3 ( Fig. 7–8 ). Color red-brown. Head surface densely microreticulate, strongly dull with shiny tubercles each bearing single seta, separated by 2–3 diameters, tubercle diameters equal 1–2 ocular facets; setae short, barely visible medially, longer and distinct laterally and basally. Vertex with basal groove and carina complete from side to side, groove continuing laterally above eyes. Clypeal apex weakly emarginate medially, somewhat sinuate, with small, dense, evenly spaced tubercles, appearing serrate, without large tubercle on each side of middle, lateral angles roundly oblique, pronounced, lacking tooth ( Fig. 10–11 ). Mandible pair symmetrical; mesal tooth strong; lateral prominence weak; outer margin abruptly rounded. Pronotum with all foveae weakly impressed except fovea on each side medially near lateral margin strongly impressed; surface with straight setaebearing carinae long, sharply raised; surface between carinae rugose and weakly microreticulate, glossy ( Fig. 11 ); carinae distinct laterally above lateral foveae. Elytra with surface somewhat glossy, microreticulate; striae convex, feebly carinate, carinal segments widely separated, each with short seta; intervals with deep, circular punctures. Metasternum long, feebly shiny, microreticulate and rugose, surface medially flat with weak median carina on posterior 1/3, surface either side of glabrous middle with short seta bearing ridges; metasternal groove nearly invisible. Lateral protibial teeth unevenly spaced, basal 2 teeth close together. Mesotibia with 9 spines laterally, evenly spaced in posterolateral emargination terminating at base of strong apical projection ( Fig. 9 ). Posterior metatrochanteral margin crenate ( Fig. 9 ); posterosuperior surface of metatrochanter with tooth. Metafemoral surface with widely scattered, elongate, setae-bearing tubercles, microreticulate; width to length ratio 1.0:1.5, with narrow flange on anterior margin; small blunt tooth at angle near trochanter; posterosuperior margin without teeth ( Fig. 9 ). Metatibia broadly triangular, surface microreticulate, outer margin evenly crenate, lacking teeth, inner margin smooth, pubescent ( Fig. 9 ). Apex of 5th abdominal ventrite truncate. Genitalia with basal piece slightly longer than parameres, proximal end curved; median lobe shorter than parameres, tapered from base to rounded apex, broad, about width of paramere at middle, reflexed before apex; paramere feebly curved in lateral view, apex bluntly rounded ( Fig. 12 ).

Female allotype. Length 3.6 mm, width 2.0 mm. Apex of 5th abdominal ventrite with triangular notch. Other differences here considered individual variations include: Mesotibia with 7 spines laterally, 4 short on median tooth, 3 longer and evenly spaced in posterolateral emargination. Metatibia narrower, not as broad medially as in male holotype.

Type material. Holotype male ( FSCA): DOMINICAN REPUBLIC / Monte Cristi, 4.8 km. N / Villa Elisa , mv + bl, 31 / May 1994, R. Turnbow . Allotype female ( FSCA): same label data as holotype .

Etymology. This species is named for our late friend and colleague Dr. Michael C. Thomas, who took multiple trips to Hispaniola together with Robert Turnbow collecting many new species.

Figures

Figures 7–12. Glaresis thomasi Keller and Skelley, holotype male. 7) Dorsal habitus. 8) Ventral habitus. 9) Middle and hind legs. 10) Clypeus and head surface. 11) Pronotal surface, lateral view. 12) Male genitalia. Figures 7–8 scale bar = 1.0 mm, Figures 9–12 scale bar = 0.5 mm.