Trechus eutrechoides Deuve, 1992

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 : 13

Trechus eutrechoides Deuve, 1992

( Figs. 5 , 13 )

Catalogue: Trechus eutrechoides Deuve, 1992: 176 . Locus typicus: South Central Tibet, Nyalam County, Nyalam Xian (environment “friendship highway” Lhasa – Kathmandu), altitude 4700 m.

Type material: Not studied. Species identification is based on the original description including a drawing of male genitalia characters which allows an unambiguous diagnosis, as well on additional material from places near the type locality.

Additional material: CHINA: South Central Tibet : 1 male, 2 females, Lamna La , 15.000 ft., 17.vi.1924, Maj. R.W.G. Hingston, Everest Exp. Brit. Mus. 1924-386, “ thibetanus R. Jeannel det.”, the female has an additional round and red bordered label “ type ” ( BMNH) ; 1 male, Phuse La , 16.500 ft., 3.vii.1924, Maj. R.W.G. Hingston, Everest Exp. Brit. Mus. 1924-386 ( BMNH) ; 1 female, Pangle , 15.000 ft., 8.v.1924, Maj. R.W.G. Hingston, Everest Exp. Brit. Mus. 1924-386, “ thibetanus R. Jeannel det.” ( BMNH) ; 1 male, Tasam, Rongshar Valley , 12.000 ft., 20.vi.1924, Maj. R.W.G. Hingston, Everest Exp. Brit. Mus. 1924-386, “ thibetanus R. Jeannel det.” ( BMNH) .

Remarks: This material is not a part of the type series of T. thibetanus Jeannel, 1928 , as suggested by the label data of the specimen from Lamna La. This ‘ type label’ was doubtless subsequently added to the specimen, but not by R. Jeannel. However, all these specimens were mentioned by Jeannel (1928) as additional material of T. thibetanus beside the type series (see also discussion below).

Identification: See key above.

Relationships: See T. thorongiensis Schmidt, 1994 , below.

Distribution and geographical variation: Fig. 98 . Tibetan Himalaya of Nyalam County, South Central Tibet, north of Central Nepal. An allopatric subspecies mondaensis was described from the Tibetan Himalaya of Lhodrak County, South Tibet, north of Bhutan which slightly differs in the length of the appendages (see below).

Habitat: Lower alpine zone; vertical distribution approximately 4000–5000 m (but see also ssp. mondaensis ).

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.

FIGURES 12–27. Aedeagal median lobe with sclerotized portions of internal sac in lateral view (Figs. 12–18, 23–26; Figs. 14, 17, 23, 26 in addition with parameres) and in dorsal view (Fig. 27); apical portion of the longer copulatory piece (Figs. 19–22). Fig. 12, Trechus thorongiensis Schmidt, 1994, paratype, the arrow pointed to the prolongated basal portion of the shorter copulatory piece. Fig. 13, T. eutrechoides eutrechoides Deuve, 1992, non-type specimen from Rongshar Valley. Fig. 14, T. eutrechoides mondaensis Deuve, 1997, paratype. Figs. 15, 19, T. thibetanus Jeannel, 1928, holotype. Figs. 16, 20, T. thibetanus Jeannel, 1928, non-type specimen from Kampa La. Figs. 17, 21, T. dongulaensis sp. n., paratype. Figs. 18, 22, T. namtsoensis sp. n., paratype. Fig. 23, T. glabratus sp. n., paratype. Fig. 24, T. wrzecionkoi Deuve, 1996, non-type specimen from Gyama, Chungenpo Chong side valley. Fig. 25, T. korae sp. n., paratype. Figs. 26, 27, T. martinae sp. n., paratype.