Emarginula adriatica

Emarginula adriatica View in CoL Costa O.G., 1830

Fig. 11 View FIGURE 11. a – c l–n

Emarginula adriatica Costa O.G., 1830 (pp. 119, 122).

Emarginula adriatica O.G. Costa, 1829 View in CoL — Poppe & Goto 1991 (p. 67, pl. 2, fig. 17); Mastrototaro et al. 2010 (fig. 5 d). Emarginula adriatica View in CoL Costa O.G., 1829— Cossignani et al. 1992 (fig. 020); Giannuzzi-Savelli et al. 1994 (p. 46, figs. 73–74);

Repetto et al. 2005 (p. 74, bottom right fig.); Beck et al. 2006 (p. 40, bottom fig.); Crocetta & Spanu 2008 (p. 68, fig. 3M). Emarginula adriatica View in CoL (Costa O.G., 1829)— Portalatina 2008 (p. 149, figs. 3A–F).

Diagnostic characters. Elevated limpet-shaped shell; oval basal outline; recurved apex nearly reaching the posterior margin; anal slit moderately deep and adapically rounded; selenizone bordered by raised flanges; strong, nodulose to spiny radial ribs gradually increasing in number by intercalation; densely packed concentric riblets in the interspaces. Protoconch: almost planispiral, slightly turned to the right; 1.25 whorls; diameter about 170 µm; fine, irregularly shaped granules roughly arranged in spiral alignments; transition to the teleoconch marked by a low varix.

Remarks. Although dated 1829, the work by Costa was published in 1830 according to Fasulo (2013).

Occurrence. Box-corer samples BC22 (2 specimens), BC66 (2), BC71 (12), BC72 (6); core BC67 (1). Maximum length: 11 mm.

Distribution and habitat. The species is distributed in the Mediterranean and adjacent Atlantic waters ( Spain to the Canaries), including seamounts ( Poppe & Goto 1991; Beck et al. 2006); it is often found associated with deep-water corals, e.g. Corallium rubrum off Sardinia coasts, possibly feeding on Porifera ( Beck et al. 2006; Crocetta & Spanu 2008). In the Santa Maria di Leuca CWC biotope, it was found on dead colonies of Madrepora oculata (Mastrototaro et al. 2010) , rarely occurring in solitary coral thanatofacies (Rosso et al. 2010). Fossil record. Pliocene of Sicily ( Monterosato 1872).