Cuspidaria rostrata ( Spengler, 1793 )

Negri, Mauro Pietro & Corselli, Cesare, 2016, Bathyal Mollusca from the cold-water coral biotope of Santa Maria di Leuca (Apulian margin, southern Italy), Zootaxa 4186 (1), pp. 1-97 : 47

Cuspidaria rostrata ( Spengler, 1793)

Fig. 10 i–k

Mya rostrata Spengler, 1793 (p. 42, pl. 2, fig. 16).

Neaera rostrata Spengler—Jeffreys 1882 [a] (p. 938); Hidalgo 1917 (p. 494).

Cuspidaria rostrata (Spengler) Dall—Verrill & Bush 1898 (p. 800, pl. 72, fig. 6).

Cuspidaria (Cuspidaria) rostrata (Spengler) — Tebble 1966 (p. 204, text-fig. 108b).

Cuspidaria rostrata (Spengler, 1792) — Nordsieck 1969 (p. 174, pl. 24, fig. 98.62).

Cuspidaria rostrata Spengler, 1793 — Barash & Danin 1992 (p. 322, fig. 370).

Cuspidaria (Cuspidaria) rostrata ( Spengler, 1793) — Cossignani et al. 1992 (fig. 406).

Cuspidaria rostrata ( Spengler, 1793) — Poppe & Goto 1993 (p. 139, pl. 26, fig. 9); Salas 1996 (p. 74, figs. 113–114); Repetto et al. 2005 (p. 355, top right fig); Beck et al. 2006 (p. 110, mid fig.); Oliver et al., 2016 (online resource).

Diagnostic characters. Elongately oval shell; very long and truncate posterior rostrum; right valve hinge with a low elongate posterior lateral tooth; outer surface with dense, somewhat lamellar commarginal growth markings. shell type ST-2D; length about 180 µm; roundish outline; convex profile; P-1 surface almost smooth; P-2 nearly absent; transition to the nepioconch rather distinct.

Occurrence. Box-corer samples BC66 (3 specimens), BC72 (1); cores BC04 (1), BC05 (6), BC51 (1), BC72 (2). Maximum length: about 13 mm.

Distribution and habitat. The species occurs in muddy sediment at shelf edge depths in the northern North Sea and arctic waters, and reaches deeper settings southward on both the Atlantic margins and across the Mediterranean, including the Levantine basin ( Barash & Danin 1992; Buhl-Mortensen & Høisaeter 1993; Galil 2004; Oliver et al. 2016).

Fossil record. Pliocene of Italy; Pleistocene of Sardinia and southern Italy ( Monterosato 1872; Di Geronimo & Bellagamba 1985; Di Geronimo & La Perna 1997).

Figures

FIGURE 10. a – c: Allogramma formosa (Jeffreys, 1882); RV, sample BC 72, scale bars: 2 mm (a – b), 0.1 mm (c, prodissoconch); d – e: Poromya granulata (Nyst & Westendorp, 1839); LV, sample BC 72, scale bar 1 mm; f – h: Cuspidaria lamellosa (Sars G. O. ex Sars M., 1872); RV (f, h) and LV (g), sample BC 72, scale bars: 1 mm (f – g), 0.1 mm (h, prodissoconch); i – k: Cuspidaria rostrata (Spengler, 1793); RV, samples BC 66 (i – j) and BC 72 (k), scale bars: 5 mm (i – j), 0.1 mm (k, prodissoconch); l – n: Tropidomya abbreviata (Forbes, 1843); LV, sample BC 72, scale bars: 5 mm (m), 2 mm (l, juvenile), 0.1 mm (n, prodissoconch); o – q: Cardiomya costellata (Deshayes, 1835); RV, sample BC 72, scale bars 2 mm (o – p), 0.1 mm (q, prodissoconch).