Trechus (Minitrechus) patrizii Jeannel, 1960

Faille, Arnaud, Hofmann, Sylvia, Merene, Yeshitla, Hauth, David, Opgenoorth, Lars, Woldehawariat, Yitbarek & Schmidt, Joachim, 2023, Explosive radiation versus old relicts: The complex history of Ethiopian Trechina, with description of a new genus and a new subgenus (Coleoptera, Carabidae, Trechini), Deutsche Entomologische Zeitschrift 70 (2), pp. 311-335 : 311

Trechus (Minitrechus) patrizii Jeannel

Figs 30-35

Trechus Trechus Patrizzi [sic!] Jeannel, 1960: 265; locus typicus: "mont Chillálo”.

Trechus Patrizii Jeannel (1960): 266.

Trechus patrizii Jeannel: Casale and Laneyrie (1982): 125.

Trechus (s. str.) patrizzii [sic!] Jeannel: Lorenz (2005): 186.

Trechus patrizii Jeannel: Ortuño and Novoa (2011): 135.

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

Trechus patrizii Jeannel: Schmidt and Faille (2018): 37.

Trechus oromiensis Magrini et al.: Schmidt and Faille (2018): 37.

Trechus (s. str.) patrizii Jeannel: Quéinnec et al. 2021: 65.

Trechus (s. str.) oromiensis Magrini et al.: Quéinnec et al. 2021: 65.

New synonymy.

Trechus patrizii Jeannel, 1960 = Trechus oromiensis Magrini, Quéinnec & Vigna Taglianti, 2012, syn. nov.

Type material examined.

Trechus patrizii Jeannel: Holotype female, with label data “TYPE” (printed on red card), "A.O.I. Arussi occ. / Reg. Aselle m. 2600 ca / pend. M.te Cillalo / S. Patrizi 20:27.4.38", " Trechus / Trechus patrizii nov. / R. Jeannel det., 19" in UARK (Fig. 30 ).

Paratype male, with label data "A.O.I. Arussi occ. / Torr. Asciabacá / S. Patrizi 28.IV.38 / m 2500", " Trechus / Trechus patrizii n.", "Lectotype / E. Quéinnec dés. 1994" (printed on red card), " Trechus / Trechus patrizii / MNHN Paris" (printed and handwritten on red card) in MNHN (Fig. 32 ).

Remarks.

Jeannel (1960: 266) stated that the type specimen is deposited in the S.L. Straneo collection. Significant parts of the Straneo collection together with the T. patrizii specimen cited by Jeannel (1960) are now preserved in the UARK (M. Pavesi, pers. comm. 2018). The above cited T. patrizii specimen from the UARK collection has thus to be considered the holotype of T. patrizii , while the (unpublished) lectotype designation made by E. Quéinnec for the specimen preserved in the MNHN has to be considered unjustified.

Trechus oromiensis Magrini et al.: Type material not studied. Identification is based on the detailed description of this distinctive taxon and comprehensive material from the type locality (see Schmidt and Faille 2018).

Additional material.

For comprehensive material studied see our previous paper ( Schmidt and Faille 2018). Note that in this study, T. oromiensis Magrini, Quéinnec & Vigna Taglianti was erroneously treated as a distinct species. In the meantime, the following additional material was available for us: Ethiopia, Oromia, SE-slope of Mt. Chillalo, Dhaba village, alt. 3200 m, 19.II.2020, 7.861644°N, 39.27711°E, leg. J. Schmidt, C. Wirkner, Yeshitla M. (1 female: CSCHM); ditto, Bale Mts. , Web river N Dinsho, alt. 3000 m, 5.II.2019, 07°07'18"N, 39°46'03"E, leg. R. Emmerich, J. Schmidt, Yeshitla M. (12 specimens: CSCHM) ; ditto, Bale Mts. , forest remain W Dinsho, alt. 3100 m, 8.II.2019, 07°06'16"N, 39°44'46"E, leg. R. Emmerich, J. Schmidt, Yeshitla M. (12 specimens: CSCHM) ; ditto, Bale Mts. , Sebsebe Washia Forest, Salgen Valley, alt. 2720-2800 m, 3.II.2019, 07°02'08"N, 39°36'06"E, leg. R. Emmerich, J. Schmidt, Yeshitla M. (7 specimens: CSCHM) ; ditto, Bale Mts. , Sebsebe Washia Forest, Salgen Valley, alt. 3130 m, 4.II.2019, 07°02'08"N, 39°36'06"E, leg. R. Emmerich, J. Schmidt, Yeshitla M. (30 specimens: CSCHM) ; ditto, Bale Mts. , Angeso Valley S Goba, alt. 3050 m, 5.II.2020, 6.932923°N, 39.951341°E, leg. J. Schmidt, C. Wirkner, Yeshitla M., Yitbarek W. (53 specimens: CSCHM) ; ditto, Bale Mts. , Shaya Valley SW Goba, alt. 3100-3150 m, 6.II.2020, 6.991843°N, 39.884397°E, leg. J. Schmidt, C. Wirkner, Yeshitla M., Yitbarek W. (15 specimens: CSCHM) .

Justification of the new synonymy.

Jeannel (1960) noted for his T. patrizii the absence of pronotal basolateral setae as diagnostic character. Up to today, T. patrizii is considered the only Ethiopian species bearing this particular character (for development of this character state in T. amharicus Ortuño & Novoa, for which absence of pronotal basolateral setae was likewise determined, see Quéinnec et al. 2021). However, based on re-investigation of the type material of T. patrizii , we found that a pore is present in the normal position for the basolateral seta both sides of the pronotum (Figs 30 , 31 ). Very probably, absence of these setae is based on preservation artefacts. The T. patrizii type specimens correspond in all external and genital diagnostic characters with the many specimens we previously identified as T. oromiensis Magrini et al. from the Bale Mts, Mt. Enkuolo and from the type locality of T. patrizii , Mt. Chillalo ( Schmidt and Faille 2018). In far most of these specimens, the pronotal basolateral seta is present but lost on one or both sides in very few cases (Figs 32 , 33 ; Schmidt and Faille 2018: 38, figs 58-60). Consequently, we conclude junior synonymy for the taxon T. oromiensis Magrini, Quéinnec & Vigna Taglianti under T. patrizii Jeannel.

Diagnosis.

Within the Trechus fauna of the Bale and Arsi Mountains, T. patrizii is easily recognized by absence of the posterior elytral discal seta ( Schmidt and Faille 2018). Beside T. patrizii , absence of the posterior elytral discal seta is also characteristic for T. amharicus Ortuño & Novoa and T. aethiopicus Alluaud. Trechus patrizii differs from T. amharicus by two male protarsomeres dilated, by presence of an apical disc on aedeagal median lobe, and by very differently sclerotized endophallus (for comparison see Ortuño and Novoa 2011: 134, fig. 3b, d, and Schmidt and Faille 2018: 37, figs 64-66). Trechus patrizii differs from T. aethiopicus by the pronotum with smaller laterobasal angles, and by the copulatory piece of the endophallus, which is long and spine-like (short and tube-like in T. aethiopicus , see Jeannel 1927: 197, figs 598, 599).

Relationships.

Based on the molecular data, T. patrizii is representative of a well-supported clade comprising also T. hagenia Schmidt & Faille, T. mekbibi Schmidt & Faille, and T. bastianinii Magrini & Sciaky, all endemic to the Bale Mountains (Fig. 3 ). Within this clade, T. patrizii is identified sister species of T. bastianinii .

Distribution.

Occurrences of T. patrizii are known from the northern slope of the Bale Mountains as well as from the northerly adjacent Arsi volcanos Chillalo, Encuolo, and Kaka ( Schmidt and Faille 2018; Fig. 1 ).

Habitat.

Based on our field work data, T. patrizii is an epedaphic-hemiedaphic species adapted to shadowed and moderately humid soil conditions at altitudes of about 2500-3300 m ( Schmidt and Faille 2018). It was found under large stones and by sifting leaf litter in mesophilic Hagenia forests and layers of humus shadowed by shrubs and rock faces. It was also found in large numbers in humid soils on shadowed places along mountain streams.

Figures

Figure 1. Map of Ethiopia showing the main topographic features of the country. Seven prominent volcanic massifs which are discussed in the text are highlighted. The base map was downloaded from www. freeworldmaps. net (01 - 07 - 2023).

Figure 3. Subtree of the ultrametric time-calibrated phylogeny of Trechini beetles as shown in Fig. 2 (see there for details). Collapsed, colored clades refer to previous results of Faille et al. (2013). Clades which include Ethiopian Trechus (sensu lato) species are highlighted by different colors (see text for details).

Figures 30 - 35. Trechus (Minitrechus) patrizii Jeannel, type labels (29, 31) and pronotum (31, 33 - 35). 30, 31. Holotype, female (UARK); 32, 33. Paratype, female (MNHN); 34. Specimen from Mt. Chillalo, locus typicus of T. patrizii; 35. Specimen from Goba, Bale Mts, locus typicus of T. oromiensis Magrini, Queinnec & Vigna Taglianti. The arrows in Figs 32, 33 point to the insertion pores of the seta on laterobasal angles of pronotum (setae are lacking).