Trechus fisehai, 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 : 57-59

Trechus fisehai sp. nov.

urn:lsid:zoobank.org:act:42EA54E8-5D0C-4139-800E-EC7A8CF6E6A4

Figs 91 , 95 , 99 , 133–134

Diagnosis

Very similar to the syntopic T. ericalis , but smaller on average pronotum with basolateral angles more rounded, with lateral gutter not widened towards base, and aedeagal median lobe less robust with endophallic copulatory piece much smaller. Trechus fisehai sp. nov. differs from T. grandipennis sp. nov. by the distinctly smaller length of body and aedeagal median lobe, from T. sanettii sp. nov. by the transverse patterns of elytral microsculpture, and by the copulatory piece which is located in the apical half of median lobe, from T. angovaensis sp. nov. by the more markedly bent aedeagal median lobe with smaller copulatory piece, and from T. abalkhasimi sp. nov. by the smaller aedeagal median lobe with button-like apex very slightly bent upward at tip (see key to species).

Etymology

This new species is dedicated to Mr. Fiseha Getachew, Addis Ababa, great friend of the beautiful nature of Ethiopia, for his invaluable help and support during the field campaigns of JS.

Material examined

Holotype

ETHIOPIA: ³, Bale Mts , brook valley above Goba, 3750–3800 m, 06°54′42″ N, 39°54′38″ E, 19 Feb. 2017 ( CSCHM, registration number ZSM _COL_2018_020).

Paratypes

ETHIOPIA: 16 ³³, 14 ♀♀, same data as for holotype ( CAF, CSCHM); 5 ³³, 4 ♀♀, same data as for preceding but Dec. 2006 ( CAF, CSCHM); 1 ³, 1 ♀, Bale Mts, Tegona Valley above Goba, alt. 3550 m, 06°54′42″ N, 39°53′35″ E, 20 Feb. 2017 ( CAF, CSCHM).

Description

BODY LENGTH. 3.5–4.1 mm (Ø = 3.82 mm, n = 20).

PROPORTIONS (n = 10). PW/HW = 1.37–1.46 (Ø = 1.40); PW/PL = 1.29–1.35 (Ø = 1.32); PW/PBW = 1.21–1.27 (Ø = 1.25); EW/PW = 1.55–1.72 (Ø = 1.66); EL/EW = 1.32–1.39 (Ø = 1.34).

COLOUR. Head, pronotum and elytra blackish brown, elytra shiny, slightly iridescent, lateral margins of labrum reddish brown, lightened. Basal maxillary palpomere, apex of apical palpomere, antennal base and legs light brown; middle portion of palps dark brown, antennae distally darkened beginning from second or third antennomere.

MICROSCULPTURE. Same in males and females. Head with rather large, deeply engraved, almost isodiametric meshes on disc and supraorbital area, and smaller, slightly engraved meshes on clypeus. Pronotum and elytra with smaller and more slightly engraved distinctly transverse meshes.

HEAD. Tempora about half as long as eyes; proportions of the first four antennomeres as follows: 1/0.7/0.9/0.8. In all other characters as described in T. sanettii sp. nov.

PROTHORAX. Anterior margin very slightly concave. Marginal gutter not widened near laterobasal angles. In all other characters as described in T. sanettii sp. nov.

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

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

MALE GENITALIA. EL/AL = 2.86–3.07 (Ø = 2.98, n = 8). Aedeagal median lobe moderately short, in lateral view more markedly bent behind basal bulb, its ventral margin straight in middle, indistinctly bent downward before apex, its dorsal margin convex; apical lamella moderately long, very slightly bent upward at tip; basal bulb average, sagittal aileron small. Endophallic copulatory piece moderately sclerotized, moderately small, located in apical half of median lobe, shaped like a fish trap.

Distribution

Endemic to the northeastern slope of the Bale Mts above Goba city. The species was collected at altitudes between 3550 m and 3800 m.

Figures

Figs 91–94. Trechus spp., habitus.91. T.fisehai sp. nov., paratype,³.92. T.angavoensis sp. nov.,holotype. 93. T. batuensis Magrini & Sciaky, 2006, ³ from Sanetti Plateau near Tulo Dimptu. 94. T. batuensis, ³ from Tegona Valley.

Figs 95–98. Trechus spp., head, pronotum. 95. T. fisehai sp. nov., paratype, ³. 96. T. angavoensis sp. nov., holotype. 97. T. batuensis Magrini & Sciaky, 2006, ³ from Sanetti Plateau near Tulo Dimptu. 98. T. batuensis, ³ from Tegona Valley.

Figs 99–102. Trechus spp., elytra. 99. T. fisehai sp. nov., paratype, ³. 100. T. angavoensis sp. nov., holotype. 101. T. batuensis Magrini & Sciaky, 2006, ³ from Sanetti Plateau near Tulo Dimptu. 102. T. batuensis, ³ from Tegona Valley. The arrows point to the insertions of the discal setae and the preapical seta.

Figs 126–137. Trechus spp., aedeagal median lobe, left lateral view (126, 128–129, 131, 133, 135–137) and dorsal view (127, 130, 132, 134). 126–127. T. sanettii sp. nov., paratypes. 128. T. angavoensis sp. nov., holotype. 129–130. T. batuensis Magrini & Sciaky, 2006, specimens from Wasama Valley. 131–132. T. abalkhasimi sp. nov., paratypes. 133–134. T. fisehai sp. nov., paratypes. 135. T. tragelaphus sp. nov., holotype. 136. T. nigrifemoralis sp. nov., holotype. 137. T. balesilvestris sp. nov., holotype.