Trechus rolwalingensis daldunglana, Schmidt, 2009

Schmidt, Joachim, 2009, Taxonomic and biogeographical review of the genus Trechus Clairville, 1806, from the Tibetan Himalaya and the southern central Tibetan Plateau (Coleoptera: Carabidae: Trechini) 2178, Zootaxa 2178 (1), pp. 1-72 : 62-63

Trechus rolwalingensis daldunglana ssp. n.

( Fig. 11 )

Type material: Holotype male, with label data “ NEPAL Rolwaling Himal, N Daldung La 38–4000 m, 27.5.00 leg. J.Schmidt ” ( SMNS).

Paratypes: 158 specimens (males, females), with same label data as holotype ( BMNH, CKAB, CSCHM, CWR, NMBE, SMNS) ; 1 male, Nepal, Rolwaling Himal , Daldung La N-slope, 3500–3600 m, 25.V.2000, leg. J. Schmidt ( CSCHM) .

Description: Body length: 3.2–3.8 mm.

Colour and microsculpture: As described in the nominotypical form.

Head: As described in the nominotypical form.

Pronotum: Proportions: WP/LP = 1.30–1.36, WP/WPB = 1.35–1.39, WP/WH = 1.30–1.40, WE/WP = 1.53–1.57. Hind angles pointed, distinctly bent outwards. In all other characters agreeing with the nominotypical form.

Elytra: Proportion WE/LE = 1.38–1.41. In all other characters agreeing with the nominotypical form.

Male genitalia: As described in the nominotypical form.

Etymology: The specific epithet is referring to the type locality (Daldung La); adjective.

Identification: This subspecies differs from the nominotypical form by having the pronotal hind angles more acute and distinctly bent outwards.

Distribution: Fig. 98 . Up to now only known from the north slope of the pass Daldung La, western Rolwaling Valley, Central Nepal Himalaya .

Habitat: The specimens were found under stones on subalpine meadows and were sifted from leaf litter in the cloud forests of the high montane zone at altitudes between 3600–4000 m.

Figures

FIGURE 98. Map of central parts of Tibet and the Himalaya showing distribution of species of the Trechus thibetanus group (white circles), of the Trechus pumoensis group (white squares), of the Trechus rolwalingense group (black circles), and of the Trechus stratiotes group (black squares). 1, T. namtsoensis sp. n. 2, T. dongulaensis sp. n. 3, T. thibetanus Jeannel, 1928. 4, T. glabratus sp. n. 5, T. thorongiensis Schmidt, 1994. 6, T. eutrechoides eutrechoides Deuve, 1992. 7, T. eutrechoides mondaensis Deuve, 1997. 8, T. pumoensis Deuve, 1997. 9, T. tilitshoensis Schmidt, 1994. 10, T. franzianus Mateu & Deuve, 1979. 11, T. muguensis sp. n. 12, T. eremita sp. n. 13, T. aedeagalis sp. n. 14, T. sculptipennis sp. n. 15, T. rolwalingense rolwalingense ssp. n. 16, T. rolwalingense daldunglana ssp. n. 17, T. stratiotes stratiotes ssp. n. 18, T. stratiotes malikasthana ssp. n.

FIGURES 2–11. Pronotum. Fig. 2, Trechus thibetanus Jeannel, 1928, Lectotype. Fig. 3, T. dongulaensis sp. n., paratype, male. Fig. 4, T. namtsoensis sp. n., paratype, male. Fig. 5, T. eutrechoides eutrechoides Deuve, 1992, non-type male specimen from Lamna La. Fig. 6, T. glabratus sp. n., paratype, male. Fig. 7, T. korae sp. n., paratype, male. Fig. 8, T. yak yak ssp. n., paratype, male. Fig. 9, T. yak shogulaensis ssp. n., paratype, male. Fig. 10, T. rolwalingensis rolwalingensis ssp. n., paratype, male. Fig. 11, T. rolwalingensis daldunglana ssp. n., paratype, male.