Spirocirrus Cossmann, 1916

Monari, Stefano, Valentini, Mara & Conti, Maria Alessandra, 2011, Earliest Jurassic patellogastropod, vetigastropod, and neritimorph gastropods from Luxembourg with considerations on the Triassic-Jurassic faunal turnover, Acta Palaeontologica Polonica 56 (2), pp. 349-384 : 376

Genus Spirocirrus Cossmann, 1916

Type species: Turbo calisto Orbigny, 1853 . Late Bathonian , Calvados ( France) .

Remarks.—According to Bandel (1993), Spirocirrus Cossmann, 1916 is a synonym of Scaevola Gemmellaro, 1879 , and the type species of Scaevola , namely Scaevola intermedia Gemmellaro, 1879 (Gemmellaro 1879: 342, pl. 27: 7–9), differs from type species of Cossmann’s (1916) genus, Spirocirrus calisto (d’Orbigny, 1853) (Orbigny 1853: 345, pl. 332: 9, 10; Fischer and Weber 1997: 140, pl. 21: 6), only in having a lower spire. However, other characters also differentiate S. intermedia from S. calisto . For example, S. intermedia has rounded whorls and is ornamented with collabral ribs which smoothly pass onto the base, whereas in S. calisto the juvenile whorls are roughly biangulated and become rounded only during the last growth stage, and the collabral ribs end or become much less prominent along the lower angulation.