Geodromicus (s.str.) malcolmi Shavrin, 2022

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 : 480-483

Geodromicus (s.str.) malcolmi Shavrin , sp.n.

( Figs. 27 , 60 , 64–65 )

Type material examined. Holotype, ♂ ( Fig. 60 ; dissected): ‘Arni Gad, | Mussoorie.’ <yellow, printed>, ‘Dr. Cameron | 13. IV. 22’ <printed>, ‘ Lesteva | torrentum | Cam.’ <handwritten>, ‘ HOLOTYPE | Geodromicus (s.str.) | malcolmi sp.n. | Shavrin A.V. des. 2022’ <red, printed> ( NMPC).

Description. Measurements (holotype): HW: 0.97; HL: 0.60; OL: 0.25; TL: 0.15; AL: 3.30; PL: 0.85; PWmax: 1.08; PWmin: 0.95; ESL: 1.87; EW: 1.82; MTbL: 1.25; MTrL: 0.57 (MTrL 1–4: 0.32; MTrL 5: 0.25); AW: 1.65; AedL: 0.94; BL: 4.90.

Habitus as in Fig. 60 . Body dark-brown, with slightly paler abdomen; mouthparts, antennae and legs brown (tarsi slightly paler). Forebody without microsculpture except head with traces of shallow transverse microreticulation in frontal portion and moderately coarse meshes between ocelli.

Head 1.6 times as broad as long, with distinctly convex infraorbital portions and supra-antennal elevations, with deep and wide anterio-median depression, distinctly narrowed basad toward wide and deep interocellar depression; temples convex, 1.6 times as long as longitudinal length of eyes; interocellar depression separated from infraorbital portions by deep and long anteocellar foveae, reaching level of apical third of eyes. Ocelli large, distance between ocelli about as long as distance between ocellus and posterior margin of eye. Punctation moderately sparse and fine, finer in middle and slightly larger, deeper and sparser in infraorbital portions. Antennomere 3 distinctly longer than antennomere 2, 4 distinctly shorter than 3, 5–10 slightly longer than 4, apical antennomere 1.3 times as long as 10.

Pronotum moderately small, convex, 1.2 times as broad as long, from widest anterior third gradually narrowed toward moderately long subparallel mediolateral portions; mediobasal portion with deep, transverse depression. Punctation dense, moderately large and deep, sparser in medial portion in front of mediobasal depression.

Elytra slightly longer than broad, slightly broadened posteriad, slightly more than twice as long as pronotum. Punctation dense, slightly larger and deeper than that on pronotum, coarser in parascutellar and finer and sparser in medioapical portions.

Metatibia slightly more than twice as long as metatarsus.

Male. Apical margin of abdominal tergite VIII and abdominal sternite VIII concave. Aedeagus with very wide basal portion, sharply narrowed toward narrow median lobe, from apical third gradually narrowed toward subacute apex; parameres wide, slightly widened apicad and slightly exceeding apex of median lobe, with four apical moderately long setae; internal sac without visible structures except short flagellum in middle portion ( Fig. 64 ). Lateral aspect of the aedeagus as in Fig. 65 .

Female unknown.

Comparative notes. Geodromicus (s.str.) malcolmi differs from the remaining species of the convexicollis group by the shape of the elytra slightly longer than broad and twice longer than pronotum, as well as by the different shape of the aedeagus.

Distribution. The new species is known only from the type locality in Uttarakhand, India ( Fig. 27 ).

Bionomics. The detailed bionomical data are unknown.

Etymology. The species is named in the memory of famous coleopterologist Malcolm Cameron (1873–1954), collector of the type specimen.

Remarks. Specimen apparently was collected together with Lesteva torrentum Cameron, 1924 from ‘Mussorie District, 6500 to 7000 feet above the sea’ ( Cameron 1924; Shavrin 2015).

Figures

FIGURE 27. Distribution of Geodromicus championi (circles) and G. malcolmi (square) in the Himalayan Region.

FIGURES 57–62. Habitus of Geodromicus: 57–59—G. macrothorax (Fig. 57: Kazakhstan, Chelkydysu; Fig. 58: Kazakhstan, Kokjota Mt.; Fig. 59: Kyrgyzstan, Grigoryevka), 60—G. malcolmi (holotype), 61—G. medvedevi (holotype), 62—G. affinis (holotype). Scale bars: 1.0 mm.

FIGURES 64–69. Aedeagus of Geodromicus malcolmi (Figs. 64–65: holotype) and G. affinis (Fig. 66: holotype; Figs. 67–68: India, Sonamarg; Fig. 69: Pakistan, Utrar): 64, 66–67, 69—parameral view, 65, 68—lateral view. Scale bars: 0.1 mm.