Trechus nigrifemoralis, Schmidt & Faille, 2018

Schmidt, Joachim & Faille, Arnaud, 2018, Revision of Trechus Clairville, 1806 of the Bale Mountains and adjacent volcanos, Ethiopia (Coleoptera, Carabidae, Trechini), European Journal of Taxonomy 446, pp. 1-82 : 67-69

publication ID	https://doi.org/ 10.5852/ejt.2018.446
publication LSID	lsid:zoobank.org:pub:56E50F4E-6A7E-4CE6-963E-3B49AA7A03B6
DOI	https://doi.org/10.5281/zenodo.3848543
persistent identifier	https://treatment.plazi.org/id/ACF4835B-96AD-453E-9872-15C277B22B6C
taxon LSID	lsid:zoobank.org:act:ACF4835B-96AD-453E-9872-15C277B22B6C
treatment provided by	Valdenar
scientific name	Trechus nigrifemoralis
status	sp. nov.

Treatment

Trechus nigrifemoralis View in CoL sp. nov.

urn:lsid:zoobank.org:act:ACF4835B-96AD-453E-9872-15C277B22B6C

Figs 105 View Figs 103–106 , 109 View Figs 107–110 , 113 View Figs 111–114 , 136 View Figs 126–137

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).

GoogleMaps

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.