Trechus harenna 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 harenna

description: Trechus harenna sp. nov.
urn:lsid:zoobank.org:act: 81566043-215A-4AA5-B0ED-E60549012793
Figs 28, 32, 36, 55
Diagnosis
Very similar to the above described species T. adaba sp. nov., T. dodola sp. nov., and T. harryi sp. nov., but easily distinguished by the aedeagal median lobe which is slightly sinusoidal in view from laterad with ventral margin slightly but distinctly convex. The median lobe is distinctly shorter than in the allopatric species T. harryi sp. nov., more elongated than in T. dodola sp. nov., and its endophallus is more markedly sclerotized than in T. adaba sp. nov.
Etymology
The specific epithet refers to the habitat of the new species, the Harenna Forest, which is the largest unspoiled forest in Ethiopia.
Material examined
Holotype
ETHIOPIA: ³, Bale Mts, Harenna Forest, E Rira, alt. 3150 m, 06°44′51″ N, 39°46′40″ E, Feb. 2007 (CSCHM, registration number ZSM _COL_2018_012).
Paratypes
ETHIOPIA: 4 ³³, 6 ♀♀, same data as for holotype (CAF, CSCHM); 2 ³³, 1 ♀, Bale Mts, Harenna Forest, E Rira, alt. 2900 m, 06°44′07″ N, 39°45′59″ E, 9 Feb. 2017 (CAF, CSCHM); 1 ³, 3 ♀♀, same data as for preceding but alt. 3050–3150 m, 06°44′59″ N, 39°47′36″ E, 12 Feb. 2017 (CAF, CSCHM); 85 exx (³³, ♀♀), Harenna Forest, W Rira, alt. 3000 m, 06°45′57″ N, 39°41′47″ E, 14 Dec. 2017 (NHMUK, CAF, CDH, CSCHM, MNHN, ZMAA).
Description
BODY LENGTH. 2.5–2.8 mm (Ø = 2.7 mm, n = 15).
PROPORTIONS (n = 10). PW/HW = 1.37–1.44 (Ø = 1.41); PW/PL = 1.47–1.56 (Ø = 1.52); PW/PBW = 1.22–1.29 (Ø = 1.26); EW/PW = 1.45–1.53 (Ø = 1.49); EL/EW = 1.24–1.36 (Ø = 1.30).
COLOUR. Head, pronotum and elytra dark brown, shiny, elytra more markedly iridescent. Clypeus, labrum, palpi, antennal base and legs yellowish; antennae distally darkened beginning from third antennomere, in some specimens from apical half of second antennomere.
MICROSCULPTURE. As described in T. dodola sp. nov.
HEAD. Tempora 0.8 times as long as eyes, smooth or, in some specimens, with very few very fine hairs. In all other characters as described in T. dodola sp. nov.
PROTHORAX. Marginal gutter faintly widened at laterobasal angles. Laterobasal foveae moderately small, very shallow, more distinctly limited interiorly, indistinctly limited towards disc and sides. In all other characters as described in T. dodola sp. nov.
PTEROTHORAX. In most specimens recurrent preapical stria of elytra anteriorly prolonged towards the end of the fifth stria with tip ending distinctly anteriad of level of the penultimate setiferous pore of the marginal umbilicate series. In all other characters as described in T. dodola sp. nov.
LEGS. As described in T. dodola sp. nov.
MALE GENITALIA. EL/AL = 3.16–3.42 (Ø = 3.33, n = 6). Aedeagal median lobe moderately small and moderately stout, in lateral view slightly sinusoidal, more strongly bent in basal half, with ventral margin convex and apical lamella slightly bent upward; latter moderately short with apex simply tapered or suggestively hooked; basal bulb and sagittal aileron average. Endophallus with copulatory piece indistinctly delimited, in lateral view more markedly sclerotized on dorsal side near ostium.
Distribution
Known only from the southeastern slope of the Bale Mts, east of the village Rira, at altitudes of 2900– 3150 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 31-32, DOI: 10.5852/ejt.2018.446, http://zenodo.org/record/3829902