Glaresis tumida 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 : 45-46

Glaresis tumida Gordon and Hanley , new species

Description. Male. Length 3.0 mm, width 1.6 mm; body form short, robust, sides slightly rounded, widest in posterior 1/3 ( Fig. 30A ). Color dark yellowish brown. Head with clypeal surface and frons densely rugose, with dense ridges forming somewhat reticulate pattern, with large, sparse tubercles throughout, setae short, indistinct; vertex without basal carina, surface rugose, with ridges forming somewhat reticulate pattern, without tubercles or setae. Clypeal apex emarginate, with small, evenly spaced tubercles, appearing somewhat serrate, lateral angles oblique, acute ( Fig. 30B ). Mandible pair symmetrical; mesal tooth strong; lateral prominence strong, pronounced; outer margin angulate. 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, with dense, seta-bearing carinae, carinae mostly straight in anterior 1/2, slightly irregular in basal 1/2, setae decumbent, about 2/3 length of carina; anterior and lateral pronotal margins not bordered, lateral and basal margins crenulate. Elytra with surface slightly shiny, 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. 30C ). Metasternum long, tumid, dull, finely, densely microreticulate, median surface smooth, laterally with dense irregular ridges forming somewhat reticulate pattern from base to apex, median area rounded, without median carina; metasternal groove deep, sides abruptly ridged ( Fig. 30D ). Lateral protibial teeth not evenly spaced, 2nd and 3rd teeth close together. Mesotibia with 4 short, widely spaced spines laterally, tibia slightly projecting at apex ( Fig. 30D ). Posterior metatrochanteral margin serrate with several teeth; posterosuperior surface of metatrochanter with single small tooth, tooth not visible directly in ventral view. Metafemoral surface with widely scattered, elongate, setae-bearing tubercles, microreticulate; width to length ratio 1.0:1.5, with wide flange on anterior margin; posterosuperior margin with single small tooth ( Fig. 30G ). Metatibia broadly triangular, surface entirely microreticulate, with small, bifid, posteromedian lateral projection, medially with an irregular row of coarse tubercles extended from base nearly to lateral projection, inner margin smooth, pubescent ( Fig. 30F ). Apical margin of 5th abdominal ventrite broadly, weakly rounded. Genitalia long, basal piece shorter than parameres, proximal end curved; median lobe shorter than parameres, slightly wider than paramere, slightly “pinched” medially, curved upward in apical 1/3, apex rounded in ventral view; parameres weakly curved in lateral view, slightly curved on inner margin, apex bluntly rounded ( Fig. 30E ).

Female. Apex of 5th abdominal ventrite same as male.

Variation. Length 2.8 to 3.0 mm, width 1.6 to 1.7 mm. Size of head tubercles varies slightly; lateral mesotibial margin may have 3 or 4 teeth; some specimens have the metasternum less tumid than typical; and metasternal sculpture sometimes less pronounced than typical.

Type material. Holotype female: Texas: Tex., Kenedy Co., Armstrong , 8-VIII-1971, W.H. Tyson, Attracted to black light ( USNM) . Paratypes, 16: (1) same data as holotype; (1) Atascosa Co., Pleasanton , uv. lt., 15-VI-1975, M. Druckenbrod; (1) Atascosa Co., Lyttle , 14 mi. S., 26/V/1994, BL, Wm. Godwin, R. Gibson, ex. Charles S. Wills Collection, June 2006; (1) Brooks Co., 7.3 mi. S. Falfurrias, hwy. 281 rest stop, V-I-89, E. G. Riley; (3) Brooks Co., 8 mi. S. Falfurrias , IX-12-1987, Coll. E. G. Riley, collected at mercury vapor & blacklight; (7) Kenedy Co., 6 S of Sarita, BL, IX-4-96, D. Sundberg; (1) ( Presidio Co. ) , Shafter. Sept. 2, 1949, Werner, Nutting; (1) Shafter , Presidio Co., VII-18-1968, J. E. Hafernik. ( TAMU) ( USNM) .

Remarks. This species is similar to G. gordoni and G. caenulenta but differs primarily by the tumid metaternum and by the heavily sculptured lateral metasternal surface. Glaresis tumida has the most southeastern distribution of any species of Glaresis known from the United States, one almost certainly wider than listed here.

Etymology. The specific name is the Latin tumidus, meaning swollen, referring to the swollen metasternum of this species.

Figures

Figures 30A-30G. Glaresis tumida, new species. A) Habitus view. B) Clypeus and head surface. C) Elytral striae. D) Metasternum and mesotibia. E) Male genitalia. F) Metaleg, dorsal view. G) Metaleg, ventral view.