Trechus martinae Schmidt 2009, sp. n.
Creators: name: Schmidt, Joachim
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Trechus
Trechus martinae

description: <i>Trechus martinae</i> sp. n. (Figs. 7, 26, 27, 87) <b>Type material:</b> Holotype male, with label data “ TIBET (South Central) 21.VII.07, Gyama vall. ca. 60 km E Lhasa, 4900–5230 m, ca. 29°40’36N 91°35’33E ”, “north west ascent of Chungenpo Shong side vall.” (BMNH). Paratypes: 34 males, 17 females, with same label data as holotype (BMNH, CKAB, CSCHM, CWR, MNHN, SMNS). <b>Description:</b> Body length: 3.4–4.0 mm. Colour: Dorsal surface brown, moderately shiny, head in most specimens somewhat darker than pronotum, two, three or four basal antennal segments, palpi and legs lighter brown. Microsculpture: Disc of head with faintly engraved almost isodiametric meshes, more clearly marked on vertex (x100); pronotum with very faintly engraved slightly transverse meshes on disc (x150), but with markedly engraved meshes in basal depressions (x50). Disc of elytra with moderately engraved slightly transverse meshes (x80). Head: Average sized, with eyes flat and relatively small; temples 4/5 to 5/6 of length of eyes, strongly wrinkled to the neck. Frontal furrows moderately deep, flattened at level of hind suborbital seta. Antennae moderately short, three antennomeres extend beyond the base of pronotum. Antennomere III as long as pedicellus or slightly longer; antennomere IV with 5/6 – 7/8 of length of antennomere III. Pronotum: Moderately broad, subcordate, with sides strongly contracted towards base, and with proportions relatively variable: WP/LP = 1.27–1.38, WP/WPB = 1.32–1.42, WP/WH = 1.15–1.26, WE/WP = 1.61–1.68. Surface convex, sides evenly rounded in anterior ¾ to 4/5, and concave anterad of hind angles, the latter well produced, slightly obtuse (100–110°). Marginal gutter narrow, slightly widened just anterad of laterobasal depressions. Basal depressions very sparsely pointed or wrinkled lengthwise, seldom smooth. Elytra: More slender oval, broadest at or a little behind mid-length; proportion WE/LE = 1.49–1.62. Surface convex, slightly flattened on disc. Shoulders distinct but rounded. Striae sparsely punctate, inner three or four striae deeply impressed but +/- disappearing at base and apex, outer striae shallower, striae VI–VII only slightly impressed but visible. Five or six inner intervals convex. Preapical seta is located at the end of second stria and at the beginning of the posterior elytral seventh. Male genitalia: Aedeagal median lobe stout (LE/LA = 3.07–3.20), strongly curved downwards at the beginning of apical third. Terminal lamella slightly bent upwards at tip. Basal bulb moderately large. Internal sac with sclerotized portion large, saccate. <b>Etymology:</b> Formed as a noun (name) in the genitive case. This new species is dedicated to Mrs. Martina Wegener, Lübeck, Germany, who kindly supported my fieldwork on the Tibetan Plateau in 2007. <b>Identification:</b> Body size distinctly smaller than <i>T. wrzecionkoi</i>, with seventh elytral striae only slightly impressed, with aedeagal median lobe more strongly bent downwards and with copulatory piece distinctly larger. Eyes slightly larger than <i>T. korae</i> <b>sp. n.</b>, disc of head with micromeshes shallower, frontal furrows deeper, antennae shorter, elytra on average more slender, the preapical seta on third interval is situated a little more towards apex, aedeagal median lobe distinctly larger and strongly curved only in distal third, and with internal sac more simply folded. <b>Relationships:</b> At present species relationships within the <i>T. wrzecionkoi</i> group are unknown. <b>Distribution:</b> Fig. 99. Transhimalaya east of Lhasa: Higher mountains around Gyama Valley of Medro Gonggar County, South Central Tibet. <b>Habitat:</b> Higher alpine zone; vertical distribution approximately 5100–5230 m. The specimens were found under stones on gently inclined slopes as well on the top of a mountain crest.
description: Published as part of <i>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, pp. 1-72 in Zootaxa 2178 (1)</i> on pages 23-24, DOI: 10.11646/zootaxa.2178.1.1, http://zenodo.org/record/5312276