Cochlostoma (T.) stossichi ( Hirc, 1881 )

Zallot, Enrico, Kamchev, Panche, Schilthuizen, Menno, Fehér, Zoltán, Mattia, Willy De & Gittenberger, Edmund, 2024, Cochlostoma Jan, 1830 revised: an overview of the subgenus Turritus Westerlund, 1883 and its species (Caenogastropoda, Cochlostomatidae), European Journal of Taxonomy 927, pp. 1-163 : 99-100

Cochlostoma (T.) stossichi ( Hirc, 1881)

Figs 73F , 82 (purple dots), 87–88

Pomatias stossichi Hirc, 1881: 522 .

Syntypes

CROATIA • probably ♂; “ Pomatias Stossichii, Clessin, 1880 .XIII.33. Orig. der Hirc’schen arbeit, Ponikve bei Buccari ”; NHMWno number • “ nanus West. var. stossichi Hirc, Buccari bei Fiume Croatien ”; Stossich leg.; Sep. 1882; ZMB 170.256 ,

Other specimens

CROATIA • 2- 2 km NNW of Meja; 45.3070° N, 14.5871° E; 1999; De Mattia leg.; WdM 1240 .

Type locality

CROATIA • 1- Primorje-Gorski Kotar County, Ponikve, Bakar.

Description

SHELL. Closely spaced ribletss on last part of protonconch. Teleoconch spotless, ribs rounded, irregular in size and shape and not prominent, disappearing toward aperture. Moderately developed lip with slightly bent columellar lobe hiding almost completely umbilicus.

MEASUREMENTS. 5 ♀♀: whorls=6.8–8.1, H = 6–7.3 mm, H/W=2.14–2.64, roundness =0.09–0.15, ribs incl.= 48–56°, apert. incl.= 21–24°, ribs/mm 1 st wh.= 9–9, ribs/mm 4 th wh.=8–14.

FEMALE GENITAL ORGANS. As in C. (T.) nanum .

Remarks

The species differs from C. (T.) elegans because it has either a hidden umbilicus or a narrow slit behind a barely curved columellar lobe (umbilicus wide and well visible in elegans ). Moreover, the ribbing is weaker in this species.

Figures

Fig. 73. Shell and female genitals of Clade B samples with amplified 16S. A. Cochlostoma (T.) nanum (Westerlund, 1879), Tepke, AT (NHMW-109000/AL/00703). B. C. (T.) nanum, Mt Snežnik 1764, SI (WdM-7005). C. C. (T.) nanum, Mt Risnjak, 1400 m a.s.l., HR (WdM-5666). D. C. (T.) mostarense (Wagner, 1906), Mostar, BeH (EZ-1091). E. C. (T.) elegans (Clessin, 1879), Razbojište near Oltari, HR (WdM-6896). F. C. (T.) stossichi (Hirc, 1881), 2 km NNW of Meja, HR (WdM-1240). G. C. (T.) braueri (Wagner, 1897), Klek Mt, HR (EZ-0068). H. NFS142, Škrčko Jezero, MONT (TxEx-du0044). I. C. (T.) hallgassi sp. nov., Monte Petrella 1010, I (EZ-1118).

Fig. 82.Distributionof samplesin Clade B: red= Cochlostoma (T.)braueri (Wagner, 1897);purple=C. (T.) stossichi (Hirc, 1881); blue=C. (T.) hallgassi sp. nov.; yellow =C. (T.) mariannae Nordsieck, 2011; green =C. (T.) dubium (Wagner, 1897); white = C. (T.) mostarense (Wagner, 1906). Black center for the samples with amplified 16S.