Pisanianura? pusilla Bellardi, 1873

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 : 132-133

Pisanianura? pusilla Bellardi, 1873

Fig. 6I–K

Anura pusilla Bellardi, 1873: 204 , pl. 11 fig. 24.

Material examined

ITALY – Emilia-Romagna • 4 specs; Castel di Casio ; MGGC 22306 (H = 25.4, W = 15.3 mm), MGGC 22307 (H = 15.8, W = 10.8 mm), MGGC 22308 (H = 27.0, W = 23.4 mm), MGGC 22309 (H = 23.4, W = 17.7 mm).

Remarks

Anura pusilla was originally described by Bellardi (1873) from the Middle Miocene of the Turin hills; it was reported to reach 19 mm in height and as being rare. The specimens of P.? pusilla from Castel di Casio appear to have fewer and more widely spaced spiral threads than P. craverii ( Bellardi, 1873) (see illustrations in Bellardi 1873; Ferrero Mortara et al. 1981; Landau & Harzhauser 2012). Miocene and Pliocene species of Anura Bellardi, 1873 reported by Bellardi (1873) were mentioned by Warén & Bouchet (1990) when discussing Pisanianura . They regarded the middle Miocene A. craverii as belonging to Pisanianura , but considered the position of A. pusilla as “more doubtful”. This view was adopted by Landau & Harzhauser (2012). Because our specimens neither preserve the protoconch nor allow a clear view on the aperture, we assigned A. pusilla only hesitantly to Pisanianura .

Stratigraphic and geographic range

Upper Oligocene (upper Chattian) to Upper Miocene, northern Italy.

Figures

Fig. 6. Neritimorpha Golikov & Starobogatov, 1975 and Caenogastropoda Cox, 1960 from the Calcari a Lucina seep deposits in northern Italy. A–B. The phenacolepid (Neritimorpha) Thalassonerita megastoma Moroni, 1966, Le Colline (MSF 1223), internal mold showing columellar muscle scars. C–E. The elachisinid (Caenogastropoda) Laeviphitus sp. C. Small specimen with preserved protoconch, from Ca’ Rovereti (NRM Mo 204837). D. Close-up on transition between proto- and teleoconch, from Ca’ Rovereti (NRM Mo 204838). E. Tall specimen (MSF 1204) from Le Colline. F–G. Naticidae indet. sp. 1. F. Shell embedded in rock matrix, from Castiglion dei Pepoli (MGGC 22304). G. Operculum (MSF 1218). H. Naticidae indet. sp. 2 from Guzzano (MGGC 22305). I–K. Pisanianura? pusilla Bellardi 1872, from Castel di Casio. I. Specimen with remains of siphonal canal and shell sculpture (MGGC 22306). J. Small, internal mold (MGGC 22307). K. Large specimen with preserved shell (MGGC 22308). L. Semicassis aff. reticulata (Bellardi & Michelotti, 1840), Castiglion dei Pepoli (MGGC 22310).