Glaresis ordosensis Král, Hrůzová, Lu & Bai, 2017

Král, David, Hrůzová, Lucie, Lu, Yuanyuan & Bai, Ming, 2017, First records of Glaresidae (Coleoptera) in China, with the description of a new species from Inner Mongolia and Shaanxi, Zootaxa 4306 (1), pp. 145-150 : 146-147

Glaresis ordosensis Král, Hrůzová, Lu & Bai , new species ( Figs. 1–10 )

Type locality. China, Nei Menggu [= Inner Mongolia], Yijin Huoluo Qi, Shihui Miao (temple) [39°17'16"N, 109°56'31"E], 1360 m.

Type material. China, Nei Menggu: Holotype: ♂ (IZAS), “Nei Menggu, 3.viii.1999 | Yijin Huoluo Qi | Shihui Miao (temple) | 1360 m, light trap | Zhou Hongzhang lgt.” [printed]. Paratypes: ♀ (IZAS) (allotype), 1 ♂ 2 ♀♀ (NMPC), and 3 ♀♀ (IZAS), “Nei Menggu, 3.viii.1999 | Yijin Huoluo Qi | Shihui Miao (temple) | 1360 m, light trap | Zhou Hongzhang lgt.” [printed]; Shaanxi: 1 specimen (IZAS), “Shaanxi, Yulin || 15.vi.1977 | Zhu Peiyao lgt. || Glaresis N. R. | rufa Erichson | identified by Zhang Youwei 1978” [printed]; 1 specimen (IZAS), “Shaanxi, Yulin || 15.vi.1977 | Zhu Peiyao lgt.” [printed]; 1 specimen (IZAS),“ 15.vi.1977 | Zhu Peiyao lgt. | Yulin [printed]”.

Description of holotype (♂). Robust, strongly convex, weakly widened posteriad, brownish yellow in colour, weakly shiny; macrosetation pale ( Fig. 1 ).

Head ( Figs. 1, 4 ) surface finely rugose, semialutaceous. Mandibles robust, with strong lateral prominence, external margins sinuate. Anterior margin of clypeus shallowly sinuate, distinctly upturned, lateral angles rounded; lateral margin shallowly sinuate; posterior angles acute-angular ( Fig. 1 ). Surface of frons and clypeus covered with sparsely, irregularly spaced, shiny tubercles; some of them bearing stout, semierect macrosetae. Genae transverse, lateral margin rounded, smooth, bare. Epistomal grooves distinct, darkened. Occiput with irregularly spaced tubercles, tubercles somewhat smaller than on clypeus and frons. Each tubercle bearing short, indistinguishable macroseta.

Pronotum ( Fig. 1 ) transverse, moderately convex, with shallow medial longitudinal and anterior transverse grooves weakly impressed; lateral impressions strong, grooves beside longitudinal groove absent ( Fig. 1 ). Margins not bordered; anterolateral, lateral, basal margins serrate and with a row of approximately clavate macrosetae; posterior angles protruding in short tips. Surface covered with densely, almost regularly longitudinal carinae; each carina bearing thick, recumbent macroseta.

Scutellum small, almost triangular, alutaceous, smooth, glabrous.

Elytra strongly convex, with 10 striae and 10 intervals; each stria with a row of coarse, simple punctures; intervals 1–7 and 10 remarkably costate, 8, 9 flat, all bearing a row of short, simple to weakly clavate, erect macrosetae ( Fig. 6 ).

Wings macropterous.

Pygidium slightly shiny, scabrous.

Ventral surface ( Figs. 2, 5 ) alutaceous; abdominal ventrites covered with sparse, fine macrosetae. Meso-metaventral plate flat, smooth, surrounded by a row of stout macrosetae and with darkened translucent, longitudinal endocarina medially. Mesotibial fossae of meso-metaventrum present, distinctly impressed, with sharp edges, divergent posteriad ( Fig. 5 ).

Legs ( Figs. 7–10 ). Posterior-superior margin of metafemora with blunt, broadly triangular teeth ( Figs. 9–10 ); anterior-superior margin of metafemora with a row of clavate macrosetae. Protibia tridentate ( Figs. 1–2 ). Mesotibia long, nearly straight; distal part of outer edge shallowly emarginate, bearing 5 short, stout spines; basal external tooth of mesotibia emarginate basally ( Figs. 7–8 ). Metatibia broadly triangular, outer margin irregularly serrate with a median projection, strongly macrosetaceous; row of 4 spine-bearing tubercles extending from base to apex medially ( Fig. 9 ); inner margin smooth, macrosetaceous ( Fig. 10 ); apex of metatibia with outer horseshoe-shaped portion sub-equal to inner spur-bearing portion; inner margin of the horseshoe shape with a row of contiguous short macrosetae ( Fig. 10 ).

Male genitalia ( Fig. 3 ). Aedeagus with parameres distinctly longer than phallobasis; parameres sclerotized throughout, lateral margin regularly arcuate to almost regularly rounded tips; phallus scletorized, sides straight, weakly divergent anteriad.

Sexual dimorphism. Female differs from male in being indistinctly broader posteriad ( Fig. 2 ).

Measurements. Total body length: 4.0– 4.3 mm (holotype 4.2 mm; allotype 4.3 mm).

Variability. Paratypes vary slightly in body length; distal part of outer edge of mesotibiae bearing 4–6 short, stout spines.

Diagnosis. The new species is classified within the Glaresis oxiana Semenov, 1892 species group mainly based on the absence of pronotal grooves beside the medial longitudinal groove and presence of mesotibial meso-metaventral fossae (see Semenov & Medvedev 1932; Nikolajev 1987). Glaresis ordosensis is similar and probably closely related to G. orientalis . For differentiation from this species see the identification key bellow.

Collecting events. Type material was collected using a light trap.

Etymology. Derived from area of origin of the new species, the Ordos Loop, region of China west of Beijing enclosed by a large rectangular bend of the Yellow River.

Distribution. China (Inner Mongolia, Shaanxi).

Figures

FIGURES 1 – 10. Glaresis ordosensis Král, Hrůzová, Lu, & Bai, new species. 1, Habitus, holotype, ♂, dorsal view; 2, habitus, allotype, ♀, ventral view; 3, aedeagus, dorsal view; 4, head, dorsal view; 5, meso-metaventral oblique grooves, ventral view; 6, detail of left elytron, dorsal view; 7, left mesothoracic leg, dorsal view; 8, left mesothoracic leg, ventral view; 9, right metathoracic leg, dorsal view; 10, right metathoracic leg, ventral view.