Calliotropis sp.

Kiel, Steffen, Sami, Marco & Taviani, Marco, 2023, Mollusks (Gastropoda, Bivalvia) from Miocene cold-seep deposits in northern Italy: revisions and additions, European Journal of Taxonomy 910, pp. 115-160 : 121

Calliotropis sp.

Fig. 2K–L

Material examined

ITALY – Emilia-Romagna • 1 spec.; Ca’ Piantè ; MSF 1076 (W = 23.3 mm) .

Description

Base about 20 mm in diameter, rather flat, basal margin sharp, marked by beaded spiral cord, umbilicus about ¼ of base diameter, bordered by smooth callus; base sculptured by three beaded spirals, outermost fine with dense nodes, and two equally strong beaded spirals with widely spaced nodes near umbilicus; aperture subcircular, entire.

Remarks

This fragmentary specimen preserving only the base resembles many fossil and recent species of Calliotropis (i.e., Jansen 1994; Pérez et al. 2022). Calliotropis today is essentially a deep-water genus and most Cenozoic fossil records are also from deep-water strata ( Dall 1909; Pérez et al. 2022).

Stratigraphic and geographic range

Upper Miocene, northern Italy.

Figures

Fig. 2. Seguenzioidea A.E. Verrill, 1884 (Vetigastropoda) from the Calcari a Lucina seep deposits in northern Italy. A–J. The cataegid Cataegis taurocrassa (Sacco, 1895). A–D. Complete specimen from Le Colline (MSF 1230). E–F. Specimen partly embedded in rock matrix (MSF 2351). G–H. Complete specimen from Ca’ Piantè (MSF 2352). I–J. Complete specimen from Ca’ Piantè (MSF 2353). K–L. The calliotropid Calliotropis sp. from Ca’ Piantè (MSF 1076).