Trechus dodola Schmidt & Faille 2018, sp. nov.
Creators: name: Schmidt, Joachim
name: Faille, Arnaud
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Trechus
Trechus dodola

description: Trechus dodola sp. nov.
urn:lsid:zoobank.org:act: 08D6193D-BAEF-4341-9982-52F40BC7C51E
Figs 25, 29, 33, 52
Diagnosis
Very similar to T. nanulus sp. nov. but slightly larger, colour of body lighter brown, aedeagal median lobe more markedly and more evenly curved, and – the most distinctive character – with two basal protarsomeres of male dilated. For comparison with the likewise similar species T. adaba sp. nov., T. harenna sp. nov. and T. harryi sp. nov. see descriptions below.
Etymology
The specific epithet refers to the city Dodola, situated on the northern slope of the western Bale Mts, close to the type locality of the new species.
Material examined
Holotype
ETHIOPIA: ³, Oromia, western Bale Mts, above Dodola, alt. 2700–2850 m, 06°53′49″ N, 39°11′32″ E, Dec. 2006 (CSCHM, registration number ZSM _COL_2018_009).
Paratypes
ETHIOPIA: 1 ³, 3 ♀♀, same data as for holotype (CAF, CSCHM).
Description
BODY LENGTH. 2.3–2.7 mm (Ø = 2.56 mm, n = 5).
PROPORTIONS (n = 5). PW/HW = 1.34–1.44 (Ø = 1.40); PW/PL = 1.50–1.57 (Ø = 1.53); PW/PBW = 1.24–1.29 (Ø = 1.26); EW/PW = 1.43–1.48 (Ø = 1.46); EL/EW = 1.29–1.33 (Ø = 1.30).
COLOUR. Head, pronotum and elytra brown, shiny, elytra slightly iridescent. Clypeus, labrum, palpi, antennal base and legs yellowish; antennae distally indistinctly darkened beginning from apical third of third antennomere.
MICROSCULPTURE. Same in males and females. Head with almost isodiametric meshes on disc and supraorbital area, smaller and slightly transverse meshes on clypeus. Pronotum with very finely engraved transverse meshes. Elytra with hardly visible, very finely engraved and very narrow transverse meshes.
HEAD. Comparatively robust. Mandibles short. Labrum with apical margin widely emarginated. Eyes moderately small, distinctly convexly protruded. Tempora convex, markedly wrinkled to the neck, 0.7–0.8 times as long as eyes, smooth. Frons and supraorbital area strongly convex, with supraorbital furrows almost uniformly bent on disc, deep throughout. Antennae short, proportions of the first four antennomeres as follows: 1/1/0.9/0.7–0.8; antennomeres 7–9 approx. 1.3 times as long as broad.
PROTHORAX. Pronotum large, markedly transverse, broadest portion in or slightly before middle, base slightly wider than apical margin. Disc markedly convex. Anterior margin slightly concave with anterior angles slightly protruded. Sides almost evenly rounded throughout. Laterobasal angles very obtuse, blunt at apex. Marginal gutter very narrow, not widened near laterobasal angles. Base straight in middle, distinctly bent anteriorly at outer quarter. Median longitudinal impression fine, not deepened near base, disappearing at apex; anterior transverse indistinct, smooth; posterior transverse impression very shallow; laterobasal foveae very small, shallow, smooth. Pronotum with laterobasal setae present.
PTEROTHORAX. Elytra convex on disc, in dorsal view short and broad, broadest in mid-length, with shoulders fully rounded; broadly rounded at apex. Striae impunctate, parascutellar stria absent, first stria absent or indistinct on disc, very finely impressed near apex, striae 2–4 (5) indistinct, external striae absent but stria 8 moderately impressed from level of the middle group of the marginal umbilicate pores towards apex. All intervals flat. Recurrent preapical stria deep, curved in front, directed to the fifth stria. Parascutellar setiferous pore present; third stria with two setiferous dorsal pores, the anterior one at the end of the anterior elytral quarter, the posterior one in middle, and with preapical seta which is situated at the apical anastomosis of second and third striae, slightly closer to elytral apex than to suture. Number and positions of the setae of the marginal umbilicate series as in Trechus s. str.
LEGS. Short and comparatively thin; protibia slightly dilated towards apex, almost straight, finely grooved on external surface. Two basal protarsomeres of male dilated.
MALE GENITALIA. EL/AL = 3.96–4.16 (n = 2). Aedeagal median lobe small and stout, in lateral view almost evenly bent throughout but with apex very slightly bent upward; apical lamella short with apex
simply tapered; basal bulb moderately large, sagittal aileron average. Endophallus with copulatory piece bag-like, arcuate towards apex, very slightly sclerotized in most parts, somewhat more distinctly sclerotized on dorsal side if viewed from lateral.
Distribution
Known only from the western part of the Bale Mts, on the northern slope of the mountain above the city of Dodola, at altitudes of 2700–2850 m.
description: Published as part of Schmidt, Joachim & Faille, Arnaud, 2018, Revision of Trechus Clairville, 1806 of the Bale Mountains and adjacent volcanos, Ethiopia (Coleoptera, Carabidae, Trechini), pp. 1-82 in European Journal of Taxonomy 446 on pages 23-27, DOI: 10.5852/ejt.2018.446, http://zenodo.org/record/3829902