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 Hiatella arctica (Linnaeus, 1767) Fig. 9 e–f Mya arctica Linnaeus, 1767 (p. 1113). Saxicava arctica Linné—Hidalgo 1917 (p. 617). Hiatella arctica (Linnaeus) — Tebble 1966 (p. 172, pl. 7, fig. h). Hiatella arctica arctica (Linné, 1767) — Nordsieck 1969 (p. 147, pl. 21, figs. 83.00–83.01). Hiatella ( Hiatella ) arctica (L.)— Brambilla 1976 (p. 125, pl. 31, figs. 22–23). Hiatella arctica (Linneo, 1767) — Grecchi 1984 (p. 26, pl. 3, figs. 17–18). Hiatella arctica (Linnaeus, 1767) — Barash & Danin 1992 (p. 313); Cossignani et al. 1992 (fig. 389); Poppe & Goto 1993 (p. 130); Peñas et al. 2006 (fig. 460); De Frias Martins et al. 2009 (p. 90, figs. 381–382). Hiatella arctica ( Linnaeus, 1758 ) — Petersen 2004 (p. 93, fig. 85); Oliver et al . 2016 (online resource). Hiatella arctica (Linné, 1767) — Repetto et al. 2005 (p. 345, bottom left fig.); Beck et al. 2006 (p. 108, bottom fig.). Diagnostic characters . Subtrigonal, extremely inequilateral shell with very short anterior side and greatly expanded posterior side; wide ventral gape; two rounded ridges from the beaks to postero-dorsal and posteroventral angles; irregularly aligned knobs over the ridges; crowded, coarse and uneven growth rugae, somewhat weaker between the ridges. Prodissoconch: not available. Remarks . Hiatella rugosa (Linnaeus, 1767) could prove to be a synonym of the present taxon. Occurrence . Box-corer sample BC70 (1 specimen); cores BC06 (1), BC21 (1), BC72 (1). Maximum length: 10 mm . Distribution and habitat . Hiatella arctica has a wide circumpolar distribution in the northern hemisphere, and reaching southward to South Africa on the Atlantic side and to Panama on the Pacific side. It is a nesting species living attached by byssus in crevices on hard substrates, on coarse bottoms, Modiolus beds and kelp holdfasts, from lower intertidal to upper slope depths, occasionally to 1400 m depth ( Barash & Danin 1992 ; Poppe & Goto 1993 ; Oliver et al. 2016 ). It was also found associated with a Sardinian deep water population of Corallium rubrum ( Crocetta & Spanu 2008 ) . Fossil record. Oligocene of northern Germany and the Netherlands; from Lower Miocene in northern and Atlantic basins; from Middle Miocene in the Mediterranean and East Europe ( Hopkins et al. 1972 ; Malatesta 1974 ; Brambilla 1976 ; Di Geronimo & Bellagamba 1985 ; Funder et al. 2001 ; Monegatti & Raffi 2001 ; Petersen 2004 ).