Calliostoma undetermined ...
Calliostoma sp. Fig. 4A–C Material examined ITALY – Tuscany • 1 spec.; Le Colline; MSF 1207 (H = 10 mm). Description Conical shell, about 10 mm high, at least seven straight-sided whorls beaded spiral cords at upper and lower suture, smooth in between; basal margin sharp, base smooth, almost flat; a...
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| Format: | Text |
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Zenodo
2023
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| Online Access: | https://dx.doi.org/10.5281/zenodo.10380136 https://zenodo.org/doi/10.5281/zenodo.10380136 |
| Summary: | Calliostoma sp. Fig. 4A–C Material examined ITALY – Tuscany • 1 spec.; Le Colline; MSF 1207 (H = 10 mm). Description Conical shell, about 10 mm high, at least seven straight-sided whorls beaded spiral cords at upper and lower suture, smooth in between; basal margin sharp, base smooth, almost flat; aperture subcircular, entire. Remarks Sacco (1896) illustrated various species of Calliostoma (as Ampullotrochus) from Miocene and Pliocene strata of northern Italy. Similar regarding the nodular subsutural cords are Ampullotrochus cinculatus (Verrill, 1884) (Sacco 1896: 45, pl. 4 fig. 46) and A. granulatus Born, 1778 (Sacco 1896: 42–43, pl. 4 figs 34–37). The latter species has, as the name indicates, a more granular sculpture (see Gardella & Tabanelli 2017: figs 3–4). A similar fossil Calliostoma with smooth whorl flanks but less distinct subsutural nodular cords is Calliostoma margarita Lozano-Francisco & Vera-Peláez, 2002 from the Pliocene of southern Spain and northern Italy (Lozano-Francisco & ... : Published as part of Kiel, Steffen, Sami, Marco & Taviani, Marco, 2023, Mollusks (Gastropoda, Bivalvia) from Miocene cold-seep deposits in northern Italy: revisions and additions, pp. 115-160 in European Journal of Taxonomy 910 on page 124, DOI: 10.5852/ejt.2023.910.2365, http://zenodo.org/record/10350702 ... |
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