Trechus oromiensis Magrini, Quéinnec & Vigna Taglianti, 2012

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 : 37-41

Trechus oromiensis Magrini, Quéinnec & Vigna Taglianti, 2012

Figs 57–66

Trechus (s. str.) oromiensis Magrini, Quéinnec & Vigna Taglianti, 2012: 26 ; locus typicus: Oromia Province, Bale massif, South of Goba, alt. approx. 3200 m.

Type material

Not studied. Identification of this distinctive species is based on its detailed description including figures of habitus and genital characters, and on additional material collected at the type locality.

Material examined

ETHIOPIA: 2 ³³, 2 ♀♀, Oromia, Mt Chillalo, SW slope, alt. 3000–3300 m, 07°54′01″ N, 39°11′26″ E, Dec. 2006 ( CAF, CSCHM); 1 ♀, Mt Chillalo, SW slope, alt. 2985 m, 07°53′31″ N, 39°10′18″ E, 30 Nov. 2016 ( CAF, CSCHM); 66 specimens (³³, ♀♀), Mt Enkuolo, NE slope, alt. 3200–3300 m, 07°23′45″ N, 39°22′27″ E, 8 Dec. 2016 ( CAF, CSCHM); 9 ³³, 2 ♀♀, Bale Mts, Dinsho, alt. 3200 m, 07°05.750 N 39°47.407 E, 19 Feb. + 2 March 2003 ( CAF, CSCHM); 10 ³³, 10 ♀♀, Bale Mts, river valley above Goba, alt. 2990 m, 06°56′08″ N, 39°57′20″ E, Feb. 2007 ( CAF, CSCHM).

Identification

Within the Trechus fauna of the Oromia region this species is easily recognizable by the combination of the following characters: body length above 3.5 mm, two protarsomeres of male dilated, each elytron with a single seta on disc (posterior discal seta lacking), pronotum with laterobasal setae present. Latter character distinguishes T. oromiensis from the sympatric species T. patrizii (see Identification chapter of the latter above).

Distribution

The most widely distributed Trechus of the study area and, up to today, the only species known from different volcanic mountains. It was found on south western slope of Mt Chillalo, northeastern slopes of Mt Enkuolo, and northern slopes of Bale Mts between Dinsho and Goba (for additional localities in northern Bale Mts see Magrini et al. 2012). The vertical distribution of the species ranges from approximately 2985 m to 3300 m.

Figures

Figs 57–60. Trechus oromiensis Magrini, Quéinnec & Vigna Taglianti, 2012, habitus (57) and head, pronotum (58–60). 57–58. ³ from Mt Chillalo. 59. ³ from Mt Enkuolo. 60. ³ from Goba, Bale Mts, locus typicus of T. oromiensis.

Figs 61–66. Trechus oromiensis Magrini, Quéinnec & Vigna Taglianti, 2012, elytra (61–63) and aedeagal median lobe (64–66). 61, 64. Specimen from Mt Chillalo (the arrows point to the insertions of the discal seta, preapical seta, and setae of the umbilical series). 62, 65. Specimen from Mt Enkuolo. 63, 66. Specimen from Goba, Bale Mts, locus typicus of T. oromiensis.