Geodromicus (s.str.) ruficornis Cameron, 1941

Shavrin, Alexey V., 2022, The bodemeyeri and the convexicollis species groups of the genus Geodromicus Redtenbacher, 1857, and additional taxonomic and faunistic data for some species of the Eastern Palaearctic Region (Coleoptera: Staphylinidae: Omaliinae), Zootaxa 5213 (5), pp. 451-496 : 491

Geodromicus (s.str.) ruficornis Cameron, 1941

( Figs. 70 , 75 )

Geodromicus ruficornis Cameron, 1941: 143

Type material examined. Holotype of Geodromicus ruficornis Cameron, 1941 , ♀ ( Fig. 75 ): ‘Type’ <round label with red margin, printed>, ‘Kashmir | Gulmarg | vi-vii-31 | Dr.Cameron’ <printed>, ‘ G. ruficornis | TYPE [red] curvipes Cam’ <handwritten>, ‘M.Cameron. | Bequest. | B.M. 1955-147.’ <printed>, ‘ Geodromicus | ruficornis Cameron, 1941 | Shavrin A. det. 2022’ <printed> ( BMNH).

Additional material examined. INDIA: KASHMIR: 1 ♀: ‘ Kashmir Gulmarg vi-vii-31 Dr.Cameron’ ( BMNH) .

Redescription. Measurements (n=2): HW: 0.76–0.82; HL: 0.58–0.60; OL: 0.20; TL: 0.13–0.15; AL (holotype): 0.40; PL: 0.72–0.74; PWmax: 0.87–0.90; PWmin: 0.67–0.72; ESL: 1.13–1.31; EW: 1.48–1.65; MTbL (holotype): 0.82; MTrL (holotype): 0.42 (MTrL 1–4: 0.22; MTrL 5: 0.20); AW: 1.57–1.60; BL: 4.60–4.75 (holotype).

Habitus as in Fig. 75 . Body reddish-brown, with slightly paler elytra; mouthparts, antennae and legs yellowbrown; apical palpomere of maxillary palpi and tarsi yellow. Head with fine transverse microsculpture, indistinct in middle and somewhat coarser on infraorbital portions, portion between ocelli and neck with dense isodiametric microreticulation; medioapical portion of pronotum with indistinct transverse meshes (indistinct in holotype). Pubescence of forebody moderately dense, yellow, semierect, longer on head; abdomen with very dense, decumbent pubescence.

Head 1.3 times as broad as long, with slightly convex supra-antennal elevations, middle portion between apical margins of eyes and infraorbital portions, with deep and wide subrectangular anterio-median depression; temples convex, distinctly shorter than longitudinal length of eyes; interocellar depression moderately large and deep, subtrapezoidal, with deep anteocellar foveae, reaching level of apical third of eyes. Eyes moderately small, strongly protruded laterad. Ocelli small, distance between ocelli about as long as distance between ocellus and posterior margin of eye. Punctation moderately fine, slightly larger in middle and denser on infraorbital portions. Apical palpomere about as long as palpomere 3, from middle gradually narrowed toward subacute apex. Antenna reaching middle of elytra when reclined; antennomere 2 about 1.3 times as long as basal antennomere, 3 distinctly longer than 2, 4–8 slightly shorter than 3, 9–10 indistinctly broader than 8, apical antennomere about 1.4 times as long as 10.

Pronotum small, slightly convex, from widest anterior third strongly narrowed posteriad toward obtuse hind angles; laterobasal portions moderately short, slightly concave; middle portion without longitudinal depression; mediobasal depression shallow, transverse; anterior margin rounded, about as long as slightly concave posterior margin. Punctation moderately sparse, slightly larger and deeper than that on head, sparser and finer in mediobasal portion.

Elytra strongly broader than long and significantly broadened posteriad, 1.5–1.7 times as long as pronotum, reaching basal margin of abdominal tergite IV; hind margins widely rounded. Punctation larger, deeper and denser than that on pronotum (coarser and larger in holotype).

Metatibia about twice as long as metatarsus.

Abdominal tergite IV with two moderately small and round tomentose spots.

Male unknown.

Female. Apical margins of abdominal tergite VIII and sternite VIII rounded.

Comparative notes. Geodromicus ruficornis can be distinguished from other Himalayan species of the genus by shapes of small pronotum and the moderately short elytra strongly broadened posteriad. Currently, it is impossible to find relative species due the missing of males for this species.

Distribution. The species is known from the type localitiy in Kashmir, India ( Fig. 70 ).

Bionomics. The detailed bionomical data are unknown.

Figures

FIGURE 70. Distribution of Geodromicus in the Himalayan Region: G. affinis (circles), G. alticola (squares), G. curvipes (triangle), G. ruficornis (diamond), G. subsimilis (black stars).

FIGURES 74–77. Habitus of Geodromicus: 74—G. curvipes (lectotype), 75—G. ruficornis (holotype), 76—G. subsimilis (holotype), 77—G. smetanai (China, Hailuogou). Scale bars: 1.0 mm.