Glaresis warneri 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 : 26-27

Glaresis warneri Gordon and Hanley , new species

Description. Male. Length 3.7 mm, width 2.0 mm; body form elongate, gradually widened from elytral base to apical 1/3 ( Fig. 16A ). Color yellowish brown. Head with clypeal surface and apical 1/2 of frons shiny, posterior 1/2 of frons and vertex densely rugose, dull, clypeus and frons with large, scattered tubercles, vertex without basal carina, setae short, indistinct. Clypeal apex slightly raised, weakly sinuate, with median emargination, lateral angles oblique, angulate ( Fig. 16B ). Mandible pair symmetrical; mesal tooth strong; lateral prominence strong, outer margin rounded. Pronotum with distinct, 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, distinct central furrow extended from base to transverse furrow; surface finely rugose, with slightly curved, setabearing carinae, setae decumbent, about 1/2 length of carina; anterior and lateral pronotal margins not bordered, all margins crenulate ( Fig. 16C ). Elytra with surface dull, finely microreticulate; all striae raised, convex, carinate, carinae widely interrupted, space between carinal segments as long as carinal segment, intervals with large, shallow, slightly rectangular punctures ( Fig. 16E ). Metasternum long, dull, finely, densely microreticulate, median surface without ridges, laterally with scattered, straight ridges in basal 2/3, median area flat, with median carina extended anteriorly from apical keel 1/2 or more distance to mesocoxae ( Fig. 16D ); metasternal groove not visible or indistinctly so. Lateral protibial teeth unevenly spaced, basal 2 teeth closer together. Mesotibia with 6 spines in posterolateral emargination, spinal bases close together, tibia slightly projecting at apex ( Fig. 16D ). Posterior metatrochanteral margin without teeth; posterosuperior surface of metatrochanter with single large tooth near femur ( Fig. 16H ). Metafemoral surface rugose, with widely, evenly spaced, obliquely transverse, small setaebearing tubercles, width to length ratio 1.0:1.5, without noticeable flange on anterior margin; posterior metafemoral margin angulate next to trochanter; posterosuperior margin with 1 large tooth ( Fig. 16H ). Metatibia broadly triangular, surface entirely microreticulate, with large, irregular, transversely oblique posteromedian lateral projection, an irregular row of small, obliquely transverse tubercles extended from base nearly to apex medially, inner margin smooth, pubescent ( Fig. 16G ). Apical margin of 5th abdominal ventrite weakly rounded. Genitalia long, basal piece longer than parameres, proximal end curved; median lobe slightly shorter than parameres, tapered from base to apex, 1/2 width of paramere at middle, slightly curved upward in apical 1/3, apex nearly acute in ventral view; parameres slightly curved before apex in lateral view, margin straight, apex narrowly rounded ( Fig. 16F ).

Female. Apex of 5th abdominal ventrite strongly rounded.

Variation. Length 2.8 to 3.7 mm, width 1.7 to 2.0 mm. Metasternal groove may be more apparent on some specimens; lateral mesotibial spine number usually 6, but often with only 5; number of teeth on posterosuperior metafemoral surface varies from 1 to 2.

Type material. Holotype: Texas: TEXAS: El Paso Co., 12 mi. NNE Fabens, 31 o 40’31"N; 106 o 02' 30"W, IV-23-1998, UV light, Coll. E. G. Riley ( TAMU) . Paratypes, 104: (83) same data as holotype; (18) El Paso Co., red dunes, 24 N of Fabens, VI-23-97, C. Wolfe; (3) El Paso Co., red dunes, 14 N of Fabens, C. Wolfe & D. Marqua. ( TAMU) ( USNM) .

Remarks. Glaresis warneri is similar to G. inducta , but is distinguished from that species by elytral striae with widely interrupted carinae; more elongate body form; larger average size; and presence of 5 or 6 lateral mesotibial spines, with the usual number 6.

All specimens examined were taken from sand dunes in the vicinity of Fabens, El Paso County, Texas. Surprisingly, no examples of G. inducta were mixed with these specimens because that species is very commonly collected in other dune systems of west Texas and New Mexico.

Etymology. This species is named for Bill Warner who has long had an interest in this genus and has generously given us the benefit of his group knowledge, as well as many valuable specimens.

Figures

Figures 16A-16H. Glaresis warneri, new species. A) Habitus view. B) Clypeus and head surface. C) Elytra. D) Metasternum and mesotibia. E) Elytral striae. F) Male genitalia. G) Metaleg, dorsal view. H) Metaleg and trochanter, ventral view.