Cardiomya costellata ( Deshayes, 1835 )

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 : 48-49

Cardiomya costellata ( Deshayes, 1835)

Fig. 10 o–q

Corbula costellata Deshayes, 1835 (p. 86, pl. 24, figs. 1–3).

Neaera costellata Deshayes—Jeffreys 1882 [a] (p. 944); Hidalgo 1917 (p. 493).

Cuspidaria (Cardiomya) costellata (Deshayes) — Tebble 1966 (p. 204, text-figs. 109a–b, 110a); Di Geronimo & Panetta 1973 (p. 110, pl. 2, fig. 2).

Cardiomya costellata (Deshayes, 1832) — Nordsieck 1969 (p. 177, pl. 25, fig. 98.81).

Cardiomya costellata (Deshayes, 1836) — Barash & Danin 1992 (p. 322, fig. 371).

Cardiomya costellata ( Deshayes, 1835) — Cossignani et al. 1992 (fig. 407); Poppe & Goto 1993 (p. 138, pl. 26, fig. 12); Repetto et al. 2005 (p. 355, mid right fig); Beck et al. 2006 (p. 111, bottom fig.); Oliver et al. 2016 (online resource).

Cuspidaria (Cardiomya) costellata ( Deshayes, 1835) — Salas 1996 (p. 76, figs. 137–138).

Cardiomya costellata (Deshayes, 1833) — De Frias Martins et al. 2009 (p. 91, fig. 389).

Cardiomya costellata (Deshayes) —Rosso et al. 2010 (fig. 11 E).

Diagnostic characters. Thin, roundish quadrangular shell; moderately long and slighly upturned posterior rostrum; hinge with a strong and stout posterior lateral tooth; acute radial ridges, closer and finer (sometimes absent) on the anterior half of the valves. Prodissoconch: shell type ST-2D; length about 180 µm; inequilateral (narrower posteriorly), slightly obliquely oval outline; convex profile; P-1 surface smooth; rim-like P-2 barely separated from P-1; transition to the nepioconch well marked.

Remarks. This species is reported in literature with at least 5 different publication dates (from 1832 to 1837). We concur with Welter-Schultes (2009) in considering Deshayes’ mollusk chapter of the “Expédition scientifique de Morée” from 1835 (along with the first reliably dated figures of the species) to be the correct year of publishing.

Occurrence. Box-corer samples BC04 (2 specimens), BC05 (5), BC66 (13), BC67 (10), BC71 (7), BC72 (97); cores BC05 (6), BC21 (4), BC72 (8). Maximum length: 6.5 mm.

Distribution and habitat. The species has a widespread distribution from Northeast America to the Caribbean and from Norway to West Africa and the whole Mediterranean; it thrives on mud, muddy sand and gravel from the infralittoral zone to about 2000 m depth; it also occurs on seamounts and knolls ( Barash & Danin 1992; Poppe & Goto 1993; Pons-Moyà & Pons 1999; Galil 2004; Oliver et al. 2016). It was regarded as a preferential characteristic element of DC (coastal detritic bottom) biocoenosis ( Caldara et al. 1981; Di Geronimo & Bellagamba 1985). In the Santa Maria di Leuca CWC biotope, it was common in mollusk mud and foraminifer mud thanatofacies (Rosso et al. 2010).

Fossil record. Pliocene of Italy, Greece and Belgium; bathyal Pleistocene of Sardinia ( Monterosato 1872; Di Geronimo & Bellagamba 1985; Marquet 2006; Tabanelli 2008).

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).