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 Japonacteon pusillus (MacGillivray, 1843) Fig. 18 j–l Tornatella pusilla Mac Gillivray, 1843 (pp. 60, 159). Tornatella pusilla — Mac Gillivray 1844 (pp. 60, 159). Actaeon pusillus Forbes—Hidalgo 1917 (p. 114). Pseudactaeon pusillus ( Forbes, 1843 ) — Nordsieck 1972 (p. 8, pl. O I, fig. 6). Pseudactaeon pusillus ( Forbes, 1844 ) — Biondi & Di Paco 1981 (p. 274, pl. 2, fig. 13); Poppe & Goto 1991 (p. 193, pl. 38, fig. 34). Japonacteon pusillus ( Forbes, 1844 ) — Barash & Danin 1992 (p. 179, fig. 195). Japonacteon pusillus (McGillivray, 1843) — Smriglio & Mariottini 1996 (p. 187, fig. 11). Japonacteon pusillus ( Mac Gillivray, 1843 ) — Repetto et al. 2005 (p. 254, bottom left fig.). Japonacteon pusillus (MacGillivray, 1843) — Beck et al. 2006 (p. 91, bottom fig.). Diagnostic characters . Ovate shell; drop-shaped aperture; thin parietal callus; low and rounded columellar fold; close-set spiral rows of roundly rectangular pits, somewhat more incised just abapical to the sutures and on the lower base. Protoconch: heterostrophic, globose, obliquely immersed; 1 visible whorl; diameter about 520 µm; surface smooth; transition to the teleoconch marked by a simple lip. FIGURE 18. a–c : Turbonilla micans (Monterosato, 1875) , sample BC51, scale bars: 0.5 mm (a), 0.2 mm (b–c, protoconch); d– f : Graphis gracilis (Monterosato, 1874) , sample BC72, scale bars: 0.5 mm (d), 0.2 mm (e–f, protoconch); g–i : Crenilabium exile (Jeffreys, 1870) , samples BC67 (g) and BC04 (h–i), scale bars: 2 mm (g), 0.2 mm (h–i, protoconch); j–l : Japonacteon pusillus (MacGillivray, 1843) , sample BC72, scale bars: 2 mm (j), 0.2 mm (k–l, protoconch); m–o : Callostracon thyrrenicum (Smriglio & Mariottini, 1996) , sample BC71, scale bars: 1 mm (m), 0.2 mm (n–o, protoconch). Occurrence . Box-corer sample BC72 (7 specimens); cores BC04 (1), BC21 (1), BC51 (2), BC72 (5). Maximum height: 8 mm . Distribution and habitat . The species has an Atlantic (from Bay of Biscay to Madeira , Cape Verde and the Caribbean) and Mediterranean distribution; it dwells on muddy and muddy-detritic bottoms from deep circalittoral to upper bathyal zones ( Nordsieck 1972 ; Poppe & Goto 1991 ; Barash & Danin 1992 ; Beck et al. 2006 ; Cervera et al. 2006 ). Fossil record. Pliocene and Pleistocene of Italy ( Monterosato 1872 ; Di Geronimo & La Perna 1997; Di Geronimo et al. 2005 ; Tabanelli 2008 ).