Cochlostoma (T.) montanum ( Issel, 1866 )

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 : 71

Cochlostoma (T.) montanum ( Issel, 1866)

Figs 55 (green dots), 56H, 60–61

Pomatias patulum var. montanus Issel, 1866: 29 .

Types

Not seen.

Other specimens

ITALY • 1- Mt Pania della Croce top (topotypical); 44.0365° N, 10.323° E; 2015; Scarlassara leg.; Scarlassara 97 • 2- Pania della Croce ; 44.0249° N, 10.2969° E; 2011; Zallot leg.; EZ1059 • 3- Passo Del Vestito ; 44.0656° N, 10.2248° E; 2009; Margelli leg.; EZ0785 • 4- tunnel del Cipollaio ; 44.0509° N, 10.2649° E; 2011; Hallgass leg.; EZ1086 • 5- Fosciomboli-Foce di Moscetta ; 44.0419° N, 10.2855° E; 2011; Hallgass leg.; EZ1087 • 6- Via Arni ; 44.0585° N, 10.2630° E; 2011; Hallgass leg.; EZ1088 • 7- Turrite Secca 1; 44.0621° N, 10.2891° E; 2015; Scarlassara leg.; Scarlassara-84 • 8- Turrite Secca 3; 44.0932° N, 10.3856° E; 2015; Scarlassara leg.; Scarlassara-76 .

Type locality

ITALY • “sulla sommita’ della Pania della Croce” ( Top of Mount Pania della Croce , Lucca, Toscana) .

Description

SHELL. Closely spaced riblets on last part of protoconch. Teleoconch with two lines of reddish spots on whorls. Moderately strong, some whitish and quite narrowly spaced ribs becoming weaker approaching aperture. Moderately weak lip with gently inwardly curved columellar lobe covering umbilicus.

MEASUREMENTS. 17 ♀♀: whorls= 7.7–10, H = 7.4–9.1 mm, H/W= 2.6–3.4, roundness= 0.15–0.2, ribs incl.= 56–66.2°, apert. incl.= 15.4–27.6°, ribs/mm 1 st wh.= 8–19, ribs/mm 4 th wh.=7–17.

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

Remarks

A horn-brown form with homogeneous ribbing has been found on the summit of Pania della Croce, the type locality of C. montanum ( Issel, 1866) . Therefore, we can identify it with this species. Some populations are doubtfully assigned to C. (T.) montanum because of differences in the ribbing of the shell. However, more morphological, molecular and distributional data of the different types are needed.

Figures

Fig. 55. Distribution of samples of the Apuane Alps part of clade B: red dots= Cochlostoma (T.) elongatum (Paulucci, 1879); green dots =C. (T.) montanum (Issel, 1866); orange dots =C. (T.) sospes (Westerlund in Paulucci, 1879). The samples with amplified 16S are marked with a black center.