Fissurella costicillatissima Sacco, 1896

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 : 126-127

Fissurella costicillatissima Sacco, 1896

Fig. 5H–L

Fissurella costicillatissima Sacco, 1896: 11 , pl. 1 figs 46–47.

Fissurella costicillatissima – Ferrero Mortara et al. 1984: 277, pl. 51 fig. 5a–b. — Harzhauser et al. 2014: 87, pl. 1 figs 3–4, 5a–b.

? Fissurella cf. costicillatissima – Cowper Reed 1932: 516.

? Fissurella costicillatissima – Konior & Krach 1965: 78, pl. 4 fig. 10.

? Fissurella aff. costicillatissima – David 1967: 12.

Material examined

ITALY – Tuscany • 2 specs; Le Colline ; MSF 1213 (L = 15 mm), MSF 1214 (L = 20.5 mm).

Remarks

Fissurella costicillatissima was originally described from the Upper Miocene of the Turin hills ( Sacco 1897). It could potentially be widely distributed in the Miocene of the Mediterranean region, with a reliable record from an Early Miocene rocky shore deposit in the North Alpine Foreland Basin ( Harzhauser et al. 2014), and unconfirmed records from the Upper Miocene of Cyprus ( Cowper Reed 1932), Poland ( Konior & Krach 1965), and France ( David 1967). A specimen illustrated as Fissurella cf. costicillatissima from the Mio-Pliocene of Lanzarote (Canary Islands) has a much more elongate foramen ( Betancort Lozano 2012: 96, pl. 4 fig. 3) and is unlikely to belong to this species. With this potentially wide geographic distribution, Fissurella costicillatissima is not unlike the extant fissurellid Diodora tanneri Verrill, 1882 , which is widespread in the western North Atlantic Ocean ( Verrill 1882; Barroso et al. 2016; Meyer et al. 2017) and has been reported from methane seeps in the Gulf of Mexico ( Cordes et al. 2010) and the southern Caribbean Sea ( Gracia et al. 2012).

Stratigraphic and geographic range

Middle to Upper Miocene, northern Mediterranean basin.

Figures

Fig. 5. Vetigastropoda Salvini-Plawen, 1980, Patellogastropoda Lindberg, 1986 and Neomphalina McLean, 1981 from the Calcari a Lucina seep deposits in northern Italy. A–G. The colloniid (Vetigastropoda) Homalopoma domeniconii Moroni, 1966. A–B. MSF 2357 from Ca’ Piantè. C–D. MSF 2365 from Ca’ Piantè. E–G. MSF 1216 from Le Colline.H–L. The fissurellid (Vetigastropoda) Fissurella costicillatissima Sacco, 1897, from Le Colline. H–I. Specimen with remnants of surface sculpture (MSF 1214). J–L. Internal mold showing mantle attachment scars and foramen (MSF 1213). M–N. The lottiid (Patellogastropoda) Tectura? cf. taurinensis Sacco, 1897, from Ca’ Cavalmagra (MSF 1310). O–Q. The neomphaline Retiskenea? sp. from Ca’ Cavalmagra. O–P. MSF 2364. Q. MSF 1312.