Trechus nigrifemoralis 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 nigrifemoralis

description: Trechus nigrifemoralis sp. nov.
urn:lsid:zoobank.org:act: ACF4835B-96AD-453E-9872-15C277B22B6C
Figs 105, 109, 113, 136
Diagnosis
In external characters this new species is very similar to the above-described sympatric species T. tragelaphus sp. nov.; for differentiation with other species of the study area see Identification chapter of the latter species above. Trechus nigrifemoralis sp. nov. differs from T. tragelaphus sp. nov. and the below-described T. balesilvestris sp. nov. externally by the darker colour of body with more blackish brown head, pronotum and elytra, and with basal three quarters of femora distinctly darker than apex. The aedeagal median lobe is much shorter than in T. balesilvestris sp. nov., with dorsal margin not widened at apical ostium as in T. tragelaphus sp. nov.
Etymology
The specific epithet refers to the distinctly darkened femoral base, which is a unique character within the Trechus fauna of the study area.
Material examined
Holotype
ETHIOPIA: ³, Oromia, western Bale Mts, above Dodola, alt. 3400–3700 m, 06°51′ N, 39°14′ E, Dec. 2006 (CSCHM, registration number ZSM _COL_2018_024).
Paratype
ETHIOPIA: 1 ♀, same data as for holotype (CSCHM).
Description
BODY LENGTH. 4.7–4.9 mm (n = 2).
PROPORTIONS (n = 2). PW/HW = 1.35–1.39; PW/PL = 1.32–1.35; PW/PBW = 1.28; EW/PW = 1.43–1.44; EL/EW = 1.41–1.46.
COLOUR. Head, pronotum and elytra blackish brown, elytra markedly shiny, iridescent. Lateral margin of labrum, palpi, antennal base, femoral apex and tibial base light brown; antennae distally darkened beginning from second (holotype) or third (paratype) antennomere; basal three quarters of femora darkened; distal four fifth of tibia darkened in the holotype.
MICROSCULPTURE. As described in T. tragelaphus sp. nov.
HEAD. Antennae moderately short, proportions of the first four antennomeres as follows: 1/0.85/0.9/0.85. In all other characters as described in T. tragelaphus sp. nov.
PROTHORAX. Pronotum with broadest portion slightly before middle, base with external quarters distinctly bent anteriorly; large and roundish laterobasal foveae more steeply sloped interiorly, connected with the basal portion of lateral gutter externally. In all other characters as described in T. tragelaphus sp. nov.
PTEROTHORAX. Elytra convex on disc, very slightly flattened if viewed from behind, in dorsal view broadest in mid-length. Parascutellar stria moderately long, striae 1–3 moderately deep impressed, internal 3–4 intervals moderately convex, recurrent preapical stria moderately short. In all other characters as described in T. tragelaphus sp. nov.
LEGS. As described in T. tragelaphus sp. nov.
MALE GENITALIA. EL/AL = 2.83 (n = 1). Aedeagal median lobe moderately robust, in lateral view with ventral margin more markedly bent behind basal bulb, almost straight towards apex; apical lamella very short, button-like, shortly bent upward. Basal bulb and sagittal aileron average. Endophallus with a moderately sclerotized fish trap-like structure below apical ostium.
Distribution
Known only from the type locality, a single brook valley in the western Bale Mts, above Dodola city. The species was collected at an altitude of approximately 3400–3500 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 67-69, DOI: 10.5852/ejt.2018.446, http://zenodo.org/record/3829902