Trechus adaba, 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 : 27-30

Trechus adaba sp. nov.

urn:lsid:zoobank.org:act:2C3B7054-4931-4B09-8245-A0DB622EC104

Figs 26 , 30 , 34 , 53–54

Diagnosis

In habitus very similar to the above-described T. dodola sp. nov., but colour of body darker, more markedly iridescent; aedeagal median lobe unevenly curved, less markedly in middle and apical half, with apex suggestively hooked, and without endophallic copulatory piece. For comparison with the likewise similar species T. harenna sp. nov. and T. harryi sp. nov., see descriptions of the latter below.

Etymology

The specifi epithet refers to the city of Adaba on the northern slope of the western Bale Mts, close to the type locality of the new species.

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_010).

Paratypes

ETHIOPIA: 23 ³³, 16 ♀♀, same data as for holotype ( CAF, CSCHM); 6 ³³, 4 ♀♀, Bale Mts, near pass south of Adaba, 3250 m, 06°46′33″ N, 39°24′58″ E, 22 Feb. 2017 ( CAF, CSCHM).

Description

BODY LENGTH. 2.5–2.8 mm (Ø = 2.62 mm, n = 15).

PROPORTIONS (n = 10). PW/HW = 1.35–1.43 (Ø = 1.40); PW/PL = 1.45–1.54 (Ø = 1.50); PW/PBW = 1.23–1.33 (Ø = 1.27); EW/PW = 1.41–1.51 (Ø = 1.46); EL/EW = 1.27–1.33 (Ø = 1.31).

COLOUR. Head, pronotum and elytra blackish brown, markedly shiny, elytra markedly iridescent. Clypeus, labrum, palpi, antennal base and legs yellowish; antennae distally darkened beginning from second antennomere.

MICROSCULPTURE. As described in T. dodola sp. nov.

HEAD, PROTHORAX, PTEROTHORAX AND LEGS. As described in T. dodola sp. nov.

MALE GENITALIA. EL/AL = 3.88–4.29 (Ø = 4.03, n = 6). Aedeagal median lobe small and stout, in lateral view more markedly bent behind basal bulb, almost straight towards apex; apical lamella short with apex very shortly bent upward, forms a very small hook; basal bulb moderately large, sagittal aileron average. Endophallus very slightly sclerotized throughout, without suggestion of a copulatory piece.

Distribution

Known only from the western part of the Bale Mts, on the northern slope above the city of Adaba, at altitudes of 3170–3250 m.

Figures

Figs 25–28. Trechus spp., habitus. 25. T. dodola sp. nov., holotype. 26. T. adaba sp. nov., paratype, ³. 27. T. harryi sp. nov., paratype, ³. 28. T. harenna sp. nov., paratype, ³.

Figs 29–32. Trechus spp., head, pronotum. 29. T. dodola sp. nov., holotype. 30. T. adaba sp. nov., paratype, ³. 31. T. harryi sp. nov., paratype, ³. 32. T. harenna sp. nov., paratype, ³.

Figs 33–36. Trechus spp., elytra. 33. T. dodola sp. nov., holotype. 34. T. adaba sp. nov., paratype, ³. 35. T. harryi sp. nov., paratype, ³. 36. T. bayedika sp. nov., paratype, ³. The arrows point to the insertions of the discal setae and the preapical seta.

Figs 37–56. Trechus spp., aedeagal median lobe, left lateral view (37, 39, 40, 42, 44–45, 47–48, 50, 52–53, 55–56) and dorsal view (38, 41, 43, 46, 49, 51, 54). 37–38. T. mattisi sp. nov., paratype. 39. T. transversicollis sp. nov., holotype. 40–41. T. minitrechus sp. nov., paratype. 42–43. T. nanulus sp. nov., paratype. 44. T. rira sp. nov., holotype. 45–46. T. iridescens sp. nov., holotype. 47. T. relictus Magrini, Quéinnec & Vigna Taglianti, 2012, specimen from brook valley above Goba. 48–49. T. oppositus sp. nov., paratype. 50–51. T. harryi sp. nov., paratype. 52. T. dodola sp. nov., holotype. 53–54. T. adaba sp. nov., paratype. 55. T. harenna sp. nov., paratype. 56. T. bombi sp. nov., holotype.