Roxania monterosatoi Dautzenberg & Fischer, 1896

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 : 84-85

Roxania monterosatoi Dautzenberg & Fischer, 1896

Fig. 19 o–q

Roxania monterosatoi Dautzenberg & Fischer, 1896 (p. 404, pl. 15, figs. 3–4).

Roxania pinguicola monterosatoi ( Dautzenberg & Fischer, 1889) — Nordsieck 1972 (p. 18, pl. O II, fig. 22). Roxania monterosatoi Dautzenberg e Fischer—Di Geronimo & Panetta 1973 (p. 90, pl. 2, fig. 6).

Roxania monterosatoi Dautz. & Fischer—Di Geronimo 1974 (p. 151).

? Roxania cfr. Monterosatoi Dautzenberg & Fischer, 1896 — Bonfitto et al. 1994 (p. 148, figs. 23–24). Roxania monterosatoi Dautzenberg & Fischer H., 1896 — Repetto et al. 2005 (p. 267, top left fig.).

Diagnostic characters. Oval shell; sunken spire; ear-shaped aperture; barely reflexed basal and apical lips; nearly orthocline outer lip; thin parietal callus; unperforated base; spiral rows of shallow rounded pits, more widely spaced in the middle of the shell; spiral furrows towards the base. Protoconch: heterostrophic, submerged (hardly visible in immature specimens only); globose; surface smooth.

Occurrence. Box-corer samples BC05 (3 specimens), BC66 (1), BC67 (3), BC72 (6); cores BC21 (1), BC72 (2). Maximum height: 3.5 mm.

Distribution and habitat. The species is distributed in the Mediterranean and the northeastern Atlantic, as far south as the Azores and Cape Verde, being typical of bathyal and deep bathyal settings ( Dautzenberg & Fischer 1896; Pons-Moyà & Pons 1999). It was found living in the bathyal of Taranto and included in the Abra-Nucula biocoenosis ( Di Geronimo & Panetta 1973).

Fossil record. Possibly Upper Pleistocene of Sardinia ( Bonfitto et al. 1994).

Figures

FIGURE 19. a – b: Ringicula sp., sample BC 72, scale bars: 0.5 mm (a), 0.1 mm (b, protoconch); c – d: Diaphana globosa (Lovén, 1846), sample BC 05, scale bars: 1 mm (c), 0.2 mm (d, protoconch); e – f: Diaphana cf. lactea (Jeffreys, 1877), sample BC 05, scale bars: 1 mm (e), 0.2 mm (f, protoconch); g – j: Philine quadrata (Wood, 1839), samples BC 72 (g – h) and BC 05 (i – j), scale bars: 2 mm (g – h), 0.2 mm (i – j, protoconch); k – n: Philine scabra (Müller, 1784), sample BC 72, scale bars: 2 mm (k), 0.5 mm (l, juvenile), 0.2 mm (m – n, protoconch); o – q: Roxania monterosatoi Dautzenberg & Fischer, 1896, samples BC 67 (o) and BC 72 (p – q), scale bars: 1 mm (o), 0.5 mm (p, juvenile), 0.2 mm (q, protoconch).