Trechus balesilvestris 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 balesilvestris

description: Trechus balesilvestris sp. nov.
urn:lsid:zoobank.org:act: 7E305BAC-1ECF-4CE7-89D7-3A6257928AEC
Figs 106, 110, 114, 137
Diagnosis
Very similar to the above-described T. tragelaphus sp. nov., which is probably the allopatric sister species, but pronotum more transverse and aedeagal median lobe longer, with apex slenderer, and with dorsal margin not markedly widened near apical ostium. For differentiation with the other species of the study area, see Identification chapters of T. nigrifemoralis sp. nov. and T. tragelaphus sp. nov.
Etymology
A compound word derived from the Bale Mountain and the Latin noun “sylvestre” (forest), refering to the local habitat of the new species, which is highly endangered due to deforestation.
Material examined
Holotype
ETHIOPIA: ³, Oromia, Bale Mts, south of Adaba, alt. 3170 m, 06°49′31″ N, 39°25′37″ E, Feb. 2007 (CSCHM, registration number ZSM _COL_2018_025).
Description
BODY LENGTH. 4.9 mm (n = 1).
PROPORTIONS (n = 1). PW/HW = 1.45; PW/PL = 1.43; PW/PBW = 1.30; EW/PW = 1.38; EL/EW = 1.41.
COLOUR AND MICROSCULPTURE. As described in T. tragelaphus sp. nov.
HEAD. Proportions of the first four antennomeres: 1/0.85/0.95/0.9. In all other characters as described in T. tragelaphus sp. nov.
PROTHORAX. Pronotum more transverse, broadest portion slightly before middle, base distinctly wider than apical margin, anterior margin moderately concave with anterior angles distinctly protruded, side margin rounded throughout. In all other characters as described in T. tragelaphus sp. nov.
PTEROTHORAX. 8 th elytral stria very finely impressed in anterior portion, deeply impressed from level of middle group of marginal umbilicate pores towards apex. Metepisternum very short, glabrous and smooth, with outer margin as long as anterior margin. In all other characters as described in T. tragelaphus sp. nov.
LEGS. As described in T. tragelaphus sp. nov.
MALE GENITALIA. EL/AL = 2.26 (n = 1). Aedeagal median lobe moderately slender, in lateral view with ventral margin suggestively sinusoidal, more markedly bent behind basal bulb, slightly convex before apex, with moderately long button-like apical lamella slightly bent upward. Basal bulb and sagittal aileron average. Endophallus with three more markedly sclerotized folding structures below apical ostium, two of which are longitudinally directed and lie on top of each other, the third one lying in upright position immediately basad of the latter.
Distribution
Known only from the type locality, a single brook valley in the western Bale Mts, south of Adaba city. The species was collected at an altitude of 3170 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 69-70, DOI: 10.5852/ejt.2018.446, http://zenodo.org/record/3829902