Lucinoma perusina ( Sacco, 1901 )

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 : 142-143

Lucinoma perusina ( Sacco, 1901)

Fig. 10A–D

Dentilucina perusina Sacco, 1901: 83 , pl. 19 figs 12–14.

Dentilucina perusina var. pseudorotunda Sacco, 1901 : pl. 21 fig. 15.

Phacoides (Lucinoma) perusinus – Moroni 1966: 82, pl. 5 figs 1, 3, pl. 6 figs 1–2.

Lucinidae – Taviani 1996: fig. 4b.

Lucinoma perusina – Kiel & Taviani 2017: 453, figs 8–9. — Sami & Taviani 2019: fig. 1b. — Kiel et al. 2023: figs 2a, 3c.

Material examined

ITALY – Emilia-Romagna • 13 specs; Caselle C ; NRM Mo 204849 • 3 specs; Guzzano; MGGC 22314 • 6 specs; Casola; MGGC 22315 • 3 specs; Castel di Casio ; MGGC 22316 (L = 37.6, H = 41.5, W = 25.7 mm); MGGC 22318 (L = 41; H = 38, W = 22.8 mm) • 13 specs; Castiglion dei Pepoli ; MGGC 22319 (L = 41.8, H = 43.2, W = 29.4). – Tuscany • 29 specs; Le Colline ; NRM Mo 204850 .

Remarks

Lucinoma perusina is widespread in Miocene seep deposits in Italy, emphasized once more by the abundant new material reported here. The label associated with the specimens from Casola read “ Lucina strigosa Michlt ”. Chavan (1959) assigned the Miocene Lucina strigosa Michelotti, 1861 to Pseudolucinisca Chavan, 1959 , but Glover & Taylor (2008) questioned this placement, pointing out that Pseudolucinisca has a large, strongly asymmetrical lunule. The specimens from Casola are too poorly preserved to show much external sculpture or the lunule. But one specimen shows a long and elongate anterior adductor muscle scar, unlike that of Pseudolucinisca lacteola (Tate, 1897) (type species of Pseudolucinisca ), and instead resembling that of Lucinoma perusina .

Stratigraphic and geographic range

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

Figures

Fig. 10. Lucinid bivalves from Calcari a Lucina seep deposits in northern Italy.A–D. Lucinoma perusina (Sacco, 1901). A–B. Articulated specimen showing lunule and anterior adductor muscle scar, from Castel di Casio (MGGC 22316). C. Internal mold from Castel di Casio (MGGC 22317). D. Specimen with preserved shell sculpture from Castiglion dei Pepoli (MGGC 22319).E–G. Meganodontia hoernea (Des Moulins, 1868). E–F. Complete specimen with some shell remains from Castel di Casio (MGGC 22321). G. Incomplete internal mold showing long and curved anterior adductor muscle scar, from Guzzano (MGGC 22320).