Panacca

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 : 44

Panacca ? sp.

Fig. 9 m–o

Diagnostic characters. Thin oval shell; posterior ventral gape; rounded posterior side; radial rows of minute, rounded to conical pustules. Prodissoconch: shell type ST-2C; length about 170 µm (P-1 about 150 µm); roundish outline; convex profile; P-1 surface weakly rough, with irregular commarginal wrinkles abapically; P-1/P-2 boundary step-like, with a weak sinuation on the ventral margin; P-2 narrow and flattened; transition to the nepioconch poorly defined.

Remarks. This unidentified taxon differs from P. loveni in that it has a smaller and more oval shell lacking the median radial ribs.

Occurrence. Box-corer samples BC71 (4 specimens), BC72 (2). Maximum length: 11 mm.

Fossil record. None recorded.

Figures

FIGURE 9. a – d: Kelliella miliaris (Philippi, 1844); RV (a, c) and LV (b, d), sample BC 72, scale bars: 1 mm (a – c), 0.1 mm (d, prodissoconch); e – f: Hiatella arctica (Linnaeus, 1767); RV, sample BC 70, scale bar 5 mm; g – i: Xylophaga dorsalis (Turton, 1819); RV, samples BC 66 (h – i) and BC 72 (g), scale bars: 0.5 mm (g – h), 0.1 mm (i, prodissoconch); j – l: Panacca loveni (Jeffreys, 1882); LV, samples BC 70 (j – k) and BC 05 (l), scale bars 10 mm (j – k), 0.1 mm (l, prodissoconch); m – o: Panacca? sp.; RV (m, n) and LV (o), sample BC 72, scale bars: 5 mm (m – n), 0.1 mm (o, prodissoconch; the arrow points at the ventral sinuation).