Bathyal Mollusca from the cold-water coral biotope of Santa Maria di Leuca (Apulian margin, southern Italy) Author Negri, Mauro Pietro Author Corselli, Cesare text Zootaxa 2016 4186 1 1 97 journal article 10.11646/zootaxa.4186.1.1 5b97cddd-5284-4a6b-8693-898864fb4711 1175-5326 165288 029B675F-776C-4CD6-9992-FA05AEADFA7B Parvamussium fenestratum ( Forbes, 1844 ) Fig. 5 e–g Pecten fenestratus Forbes, 1844 (p. 192). Amussium fenestratum Forbes—Jeffreys 1879 (p. 561). Propeamussium fenestratum ( Forbes, 1843 ) — Nordsieck 1969 (p. 45). Propeamussium fenestratum (Forbes) — Di Geronimo & Panetta 1973 (p. 98, pl. 3, fig. 11). Propeamussium fenestratum ( Forbes, 1844 ) — Cossignani et al. 1992 (fig. 283); Poppe & Goto 1993 (p. 70, pl. 10, fig. 5); Repetto et al. 2005 (p. 300, bottom right fig.). Parvamussium fenestratum ( Forbes, 1844 ) — Giannuzzi-Savelli et al. 2001 (p. 170, fig. 323); Beck et al. 2006 (p. 99, top fig.). Diagnostic characters . Rounded shell; subequal auricles; several orders of radial riblets crossed by raised commarginal lamellae; spiny projections at the intersections, more so on crossing the main ribs. Prodissoconch: shell type ST-2D; length about 170 µm; roundish D-shaped outline; convex profile; P-1 surface smooth; P-2 absent; transition to the nepioconch well marked, somewhat step-like. FIGURE 5. a–d : Delectopecten vitreus (Gmelin, 1791) ; RV (a, c, d) and LV (b), sample BC72, scale bars: 5 mm (a–b), 1 mm (c, juvenile), 0.1 mm (d, prodissoconch); e–g : Parvamussium fenestratum (Forbes, 1844) ; LV, samples BC70 (e–f) and BC72 (g), scale bars: 5 mm (e–f), 0.1 mm (g, prodissoconch); h–l : Cyclopecten hoskynsi (Forbes, 1844) ; RV (h, i, l) and LV (j, k), sample BC72, scale bars: 5 mm (h–k), 0.1 mm (l, prodissoconch); m–o : Similipecten similis (Laskey, 1811) ; RV (n, o) and LV (m), sample BC72, scale bars: 1 mm (m–n), 0.05 mm (o, prodissoconch). Occurrence . Box-corer samples BC66 (1 specimen), BC67 (3), BC70 (1), BC71 (3), BC72 (4); cores BC67 (1), BC72 (1). Maximum height: 7.5 mm . Distribution and habitat . The species is distributed from off the New England coast to Britain, the Azores , the Canaries and the Mediterranean, from about 50 to 2000 m depth, reaching 4000 m in the Azores waters ( Nordsieck 1969 ; Poppe & Goto 1993 ). It was recovered among the Abra-Nucula biocoenosis in the bathyal of Taranto ( Di Geronimo & Panetta 1973 ). In the Santa Maria di Leuca CWC biotope, it was found on muddy bottoms around coral colonies (Mastrototaro et al. 2010). Fossil record. Pliocene of the Mediterranean ( Monterosato 1872 ).