Trechus grandipennis, 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: 53-55

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Trechus grandipennis

sp. nov.

Trechus grandipennis   sp. nov.

Figs 80 View Figs 79–82 , 84 View Figs 83–86 , 88 View Figs 87–90 , 125 View Figs 115–125


Similar to T. ericalis   and the newly described T. abalkhasimi   sp. nov., T. angovaensis   sp. nov., T. fisehai   sp. nov., and T. sanettii   sp. nov., but easily distinguishable due to the larger size of body and longer aedeagal median lobe; the latter has a much larger button-like apical capitulum and a differently sclerotized endophallus.


The specific epithet refers to the markedly large and broad elytra.

Material examined


ETHIOPIA: ³, Bale Mts , Harenna Forest, E Rira, alt. 2900 m, 06°44′07″ N, 39°45′59″ E, Feb. 2007 ( CSCHM, registration number ZSM _COL_2018_019).



BODY LENGTH. 5.4 mm.

PROPORTIONS (n = 1). PW/HW = 1.41; PW/PL = 1.41; PW/PBW = 1.34; EW/PW = 1.65; EL/EW = 1.40.

COLOUR. Head, pronotum and elytra dark brown, elytra markedly shiny, iridescent, clypeus reddish brown lightened. Lateral margin of labrum, palpi, antennal base, elytral apical margin and legs light brown; antennae distally darkened beginning from second antennomere.

MICROSCULPTURE (MALE). Head with rather large, deeply engraved, almost isodiametric meshes on disc and supraorbital area, and smaller, slightly engraved meshes on clypeus. Pronotum with moderately large, slightly transverse meshes. Elytra with very slightly engraved, very narrow transverse meshes.

HEAD. Tempora about half as long as eyes; proportions of the first four antennomeres as follows: 1/0.75/0.9/0.85. In all other characters as described in T. sanettii   sp. nov.

PROTHORAX. As described in T. sanettii   sp. nov.

PTEROTHORAX. Elytra markedly convex on disc, slightly flattened if viewed from behind, in dorsal view broad oval, broadest in mid-length, with shoulders broadly rounded; apex suggestively pointed. Striae suggestively punctate, parascutellar stria moderately long and deep, striae 1–3 moderately deeply impressed, 4–6 finer, 7 indistinct, 8 deeply impressed from level of the middle group of the marginal umbilicate pores towards apex. First interval slightly convex, external intervals flat. Recurrent preapical stria deep, moderately short, slightly curved in front, directed to the seventh stria. Third stria with two setiferous dorsal pores, the anterior one near 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, as close to the elytral apex as to the suture.

LEGS. As described in T. sanettii   sp. nov.

MALE GENITALIA. EL/AL = 2.33 (n = 1). Aedeagal median lobe rather large, in lateral view more markedly bent in basal half, straight from the middle towards apex; apical lamella long with apex formed as a large button with dorsal tip slightly bent upward; basal bulb and sagittal aileron average. Endophallus with a rather large, moderately sclerotized longitudinal triangular copulatory piece in apical half of median lobe.


Endemic to the Harenna forest on the southern slope of the Bale Mts; known only from along a single brook valley east of Rira village at an altitude of 2900 m.


Bavarian State Collection of Zoology