Stomis vignai ssp. vignai Sciaky, 1998

Sciaky, Riccardo, 2024, Review of the Chinese Stomis, with description of nine new taxa and a new key (Carabidae: Pterostichini), Zootaxa 5523 (1), pp. 1-34 : 2-3

publication ID

https://doi.org/ 10.11646/zootaxa.5523.1.1

publication LSID

lsid:zoobank.org:pub:D8F096C8-5701-4FE8-B17A-77CA0126BB60

DOI

https://doi.org/10.5281/zenodo.13981825

persistent identifier

https://treatment.plazi.org/id/9D4DF639-FFF4-F979-A5BB-DBD7A119ACB7

treatment provided by

Plazi

scientific name

Stomis vignai ssp. vignai Sciaky, 1998
status

 

Stomis vignai ssp. vignai Sciaky, 1998 View in CoL

Loc. typ.: China, Western Sichuan, Wolong, Wujipeg .

= Stomis cavazzutii Lassalle, 2003 View in CoL syn. nov.

Loc. typ.: Gansu merid., 2400 m, Tochiji, sud Wudu .

= Stomis morvani Deuve, 2022

Loc. typ.: Sichuan, Maoxian syn. nov.

Described in 1998 upon a single male specimen collected by the late Vigna Taglianti in the area around Wolong , it has never been collected again in the type locality, although I have been able to examine a certain number of specimens from other localities of northern Sichuan and southern Gansu not far from Wolong. The illustrations of the habitus and of the aedeagus of the holotype are found in Sciaky (1998).

A few years after the description of S. vignai, Lassalle (2003) described two new species, Stomis cavazzutii from Gansu and Sichuan, and S. taibashanensis from Shaanxi, both characterized (in the specimens examined by him) by a multiplication of the pronotal anterolateral setae. In spite of this character, that proved to be highly variable, I have interpreted the former as a population belonging to S. vignai , only slightly different, while the latter as a slightly differentiated subspecies of S. vignai . I know directly the populations from Gansu and northern Sichuan upon further material, thus becoming persuaded that they belong to the same form described from Wolong. The other species described by Lassalle (2003) can be maintained as a subspecies of S. vignai , and two more subspecies will be added in the next pages. The peculiar features of this species (only species of this group) are the very convex shape, the short mandibles and the broadly rounded basal angles of pronotum. The character of the multiple pronotal setae, very stable in other groups of Carabidae , here is very unstable, being present occasionally in specimens of at least three out of four known subspecies, more frequently in some populations than in others, but without any stability allowing to use it as a diagnostic character between species or subspecies. Also the size is extremely variable in two of the known subspecies, presenting small specimens and very large specimens with few intermediate forms and without visible differences in the aedeagus structure.

In a recent paper, Deuve (2022) described S. morvani , a new species related to S. vignai , but different in the pronotal shape and few other morphological details. I have examined some specimens from a locality almost coincident with the type locality of this form, verifying that, as in the case of S. cavazzutii , these differences do not allow even a subspecific differentiation, since this species shows a very strong variability and the type localities of all these three forms are really very close to each other, all in the area comprised between southern Gansu and northern Sichuan.

I can therefore state the two new synonymies:

Stomis cavazzutii Lassalle, 2003 View in CoL = S. vignai ssp. vignai Sciaky, 1998 View in CoL syn. nov.

Stomis morvani Deuve, 2022 = S. vignai ssp. vignai Sciaky, 1998 View in CoL syn. nov.

Description. Habitus as in Fig. 1 View FIGURES 1–4 . The combination of characters allowing to distinguish this subspecies are: length 7.2–10.3 mm; with the characters of the species group. Body length usually short (7.3–8.5 mm), only in few cases above 9 mm. Pronotum not sinuate towards base and less constricted than in the other subspecies, only seldom with multiple anterolateral setae; elytra oval, with shoulders more distinct than in other subspecies; aedeagus long and slender, in lateral view with apical portion almost as long as basal one, subsinuate before apex ( Fig. 29 View FIGURES 29–31 ). Ratios: El/Pl = 2.08; Ew/Pw = 1.11; El/Ew = 1.68.

Distribution. Northern Sichuan, Southern Gansu. In one locality in Gansu it was found in syntopy with S. exilis ssp. brivioi .

Material examined: Gansu, 3000 m, 20 km N Wenxian : 6 ♂ ♀ ( CS) ; NW Sichuan, 20 km NW Maowen, Jiuding Shan , coniferous wood, 2150 m, 7–28. VI.2004, leg. R. Fabbri : 4 ♂ 1 ♀ ( CM) .

CS

Musee des Dinosaures d'Esperaza (Aude)

VI

Mykotektet, National Veterinary Institute

R

Departamento de Geologia, Universidad de Chile

CM

Chongqing Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Carabidae

Genus

Stomis

Loc

Stomis vignai ssp. vignai Sciaky, 1998

Sciaky, Riccardo 2024
2024
Loc

Stomis morvani

Deuve 2022
2022
Loc

Stomis morvani

Deuve 2022
2022
Loc

Stomis cavazzutii

Lassalle 2003
2003
Loc

Stomis cavazzutii

Lassalle 2003
2003
Loc

S. vignai ssp. vignai

Sciaky 1998
1998
Loc

S. vignai ssp. vignai

Sciaky 1998
1998
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