Trechus bombi, 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 : 22-23

Trechus bombi sp. nov.

urn:lsid:zoobank.org:act:972996F7-8192-4045-A2F6-E8DF0B30C38F

Figs 16 , 20 , 24 , 56

Diagnosis

Externally very similar to the above-described T. iridescens sp. nov. but larger, with elytra broader, and with aedeagal median lobe much slenderer. In addition, T. bombi sp. nov. differs from latter and similar species mentioned above by the male protarsi with two basal protarsomeres dilated.

Etymology

The name is derived from “ bombi ”, the Oromic term for beetle.

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_008).

Paratypes

ETHIOPIA: 1 ♀, same data as for holotype ( CSCHM).

Description

BODY LENGTH. 3.2–3.3 mm.

PROPORTIONS (n = 2). PW/HW = 1.42–1.43; PW/PL = 1.45–1.47; PW/PBW = 1.24–1.25; EW/PW = 1.60–1.61; EL/EW = 1.24.

COLOUR AND MICROSCULPTURE. As described in T. iridescens sp. nov.

HEAD. Eyes moderately small, tempora 0.7–0.8 times as long as eyes. Antennae moderately short, proportions of the first four antennomeres as follows: 1/0.93/0.93/0.8; antennomeres 7–9 approx. 1.8 times as long as broad. In all other characters as described in T. iridescens sp. nov.

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

PTEROTHORAX. Elytra markedly broad. In all other characters as described in T. iridescens sp. nov.

LEGS. Short and comparatively thin; protibia slightly dilated towards apex, almost straight, finely but distinctly grooved on external surface. Two basal protarsomeres of male dilated, dentoid at the inner apical border.

MALE GENITALIA. EL/AL = 2.76 (n = 1). Aedeagal median lobe slender, in lateral view more markedly bent in basal half, almost straight near apical lamella, and shortly bent upward at apex; basal bulb and sagittal aileron moderately large. Endophallus with copulatory piece elongated, indistinctly limited ventrally, more strongly sclerotized dorsally.

Distribution

Known only from the type location, on the southern slope of the Bale Mts, in the Harenna Forest east of the village Rira, at an altitude of 3150 m.

Figures

Figs 13–16. Trechus spp., habitus. 13. T. rira sp. nov., holotype. 14. T. iridescens sp. nov., holotype. 15. T. oppositus sp. nov., paratype, ³. 16. T. bombi sp. nov., holotype.

Figs 17–20. Trechus spp., head, pronotum. 17. T. rira sp. nov., holotype. 18. T. iridescens sp. nov., holotype. 19. T. oppositus sp. nov., paratype, ³. 20. T. bombi sp. nov., holotype.

Figs 21–24. Trechus spp., elytra. 21. T. rira sp. nov., holotype. 22. T. iridescens sp. nov., holotype. 23. T. oppositus sp. nov., paratype, ³. 24. T. bombi sp. nov., holotype. 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.