Caucasocressa phasiana, Hausdorf, 2003

Hausdorf, Bernhard, 2003, Revision of the genus Caucasocressa from the eastern Pontic Region (Gastropoda: Hygromiidae), Journal of Natural History 37 (21), pp. 2627-2646 : 2640

publication ID	https://doi.org/ 10.1080/00222930210158762
DOI	https://doi.org/10.5281/zenodo.5271028
persistent identifier	https://treatment.plazi.org/id/2E7D87AB-940C-FFCF-FDDD-FBDBFDCDF946
treatment provided by	Felipe
scientific name	Caucasocressa phasiana
status	sp. nov.

Treatment

Caucasocressa phasiana View in CoL , sp. n.

(figures 1, 2, 15)

Shell (figure 15). Indistinguishable from C. joannis .

Measurements. Seventeen km SE of Horasan (N =30): D= 10.5–13.5 mm, B = 12.1 mm; H= 6.1–8.2 mm, B = 7.3 mm; D/H=1.53–1.88, B =1.67.

Remarks. Caucasocressa phasiana differs from the related species in the ratio epiphallus: flagellum (see table 2), which is intermediate between C. joannis and C. tortumensis . Thus, the proportions of the genitalia are similar to those of Caucasocressa schmalzi . However, C. phasiana is smaller than the latter species and the umbilicus is distinctly narrower, occuping only about 10% of the shell breadth.

Etymology. The specific epithet refers to the occurrence of the species in the land of the ancient tribe Phasiani ( phasiana used as an adjective).

Type locality. V. Erzurum: 17 km SE of Horasan, 0.5 km W of Dellal , rocks, KK62 .

Distribution and material (figure 2). Caucasocressa phasiana is known only from a small area SE of Horasan.

Turkey: V. Erzurum: 13 km SE of Horasan, N end of the Delibaba gorge, KK62 ( NBE) ; 17 km SE of Horasan, 0.5 km W of Dellal , rocks, KK62 (det. anat.; holotype NNM, leg. H. Menkhorst 18. August 1992, measurements: D= 12.8 mm, H=8.0 mm; MEN; ZMH 2901 View Materials ) .