Himallaphus bahan, Löbl & Kodada, 2021

Löbl, Ivan & Kodada, Ján, 2021, On the Himalayan Pselaphini (Insecta: Coleoptera: Staphylinidae: Pselaphinae), Biodiversität und Naturausstattung im Himalaya VII, Erfurt: Naturkundemuseum, pp. 349-368 : 353-354

Himallaphus bahan n. sp. ( Figs 13, 14 )

Holotype ♂: INDIA Darjeeling Dist., Tonglu 3100 m 16.X.1978, LÖbl & Besuchet # 16b under shrubs ( MHNG) .

Paratypes: 3 ♂, 7 ♀, INDIA, with the same locality data as the holotype ( MHNG, PCPH) .

Etymology. The species epithet means sister in Hindi.

Description. Length 1.60-1.80 mm. Head about 1.6 times as long as wide. Frontal ridges extended to near level of posterior eye margins, narrowed posteriad. Frontal sulcus parallel-sided, widened posterior antennal tubercles, reaching mesal ridge about at level of eye mid-length. Mesal ridge delimited by narrow sulci joined posteriad to form vertexal sulcus. Vertexal sulcus reaching neck constriction. Setose patch in frontal sulcus about 0.08-0.10 mm long. Eyes in level of head mid-length, not prominent, with eight or nine facets. Temples with margins oblique or slightly concave in dorsal view, nearly angulate below eyes in dorsal view, lower and upper parts of temples separated by stria. Temples, vertex, and neck without vertical striae. Glabrous genal area not extended behind eyes. Temples and vertex anterior neck rounded, with inconspicuous, oblique and appressed pubescence. Segment IV of maxillary palpus with peduncle longer than enlarged apical area (ratio 21/17 to 22/15). Length/widthratio of antennomeres as: I 26/10: II 13/8: III 10/6: IV 8/6: V 8/6: VI 8/6: VII 10/6: VIII 9/6: IX 13/8: X 13/9: XI 28/13. Pronotum slightly longer than wide, strongly convex, nearlylong as head, with evenly rounded lateral margins; antebasal sulcus sharply delimited, longitudinal carinae dense, reaching near anterior pronotal margin, striae between carinae narrower than carinae. Pubescence short. Elytron impressed toward base, with sutural and discal carinae parallel, discal carina slightly wider than sutural carina and slightly bent; basal third to half of lateral margins oblique, carinate, pubescence similar to pronotal pubescence.

Male characters. Metaventrite with mesal impression delimited by admesal ridges diverging apically, not overlapping metacoxae, their inner sides not clearly delimited, bearing long setae not forming compact patches. Middle of ventrite II throughout with narrow shallow impression. Aedeagus ( Figs 13, 14 ) 0.48-0.53 mm long. Ventral process large, strongly bent, wider than half of median lobe. Parameres narrow in dorsal and lateral views. Internal sac lacking sclerotized pieces, with admesal spinose stripes and large, densely spinose tuft in apical half.

Measurements of the holotype (in mm). Total length 1.80; length/width of head 0.43/0.27, pronotum 0.38/0.34, elytra 0.38/0.67 (0.21), tergite I 0.54/0.81; length of maxillary palpomere IV 0.41, length of aedeagus 0.45.

Diagnosis. Upper part of temples and vertex withouttransverse striae. Contours of temples oblique. Eyes not prominent. Vertexal sulcus reaching neck constriction. Maxillary palpomere IV with peduncle longer than enlarged apical area. Base of elytra impressed. Ventral process of aedeagus wider than half of median lobe. Parameres narrow in dorsal and lateral views Internal sac with admesal spinose stripes and large, densely spinose tuft in apical half.

Distribution. India, West Bengal: Darjeeling District.

Figures

Figs 12-16. Aedeagi in dorsal and lateral views; 12. Himallaphus arko n. sp.; 13, 14. Himallaphus bahan n. sp.; 15, 16. Himallaphus chehara n. sp.; Scales = 0.1 mm.