Yoldiella striolata (Brugnone, 1876)

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 : 20

Yoldiella striolata (Brugnone, 1876)

Fig. 3 g–i

Yoldia striolata Brugnone, 1876 (p. 9, fig. 9) in Brugnone, 1873 -1876.

Leda striolata Brugnone—Jeffreys 1879 (p. 578).

Yoldiella striolata (Brugnone, 1876) — Nordsieck 1969 (p. 11).

Yoldiella seguenzae Bonfitto & Sabelli, 1995 (p. 21, figs. 1, 5–11).

Yoldiella seguenzae Bonfitto & Sabelli, 1995 — Salas 1996 (p. 44); Di Geronimo & La Perna 1997 (p. 410, pl. 7, figs. 5–6); Giannuzzi-Savelli et al. 2001 (p. 60, figs. 58–59); La Perna 2003 (p. 26, pl. 3, fig. 2).

Yoldia striolata Brugnone, 1876 — La Perna 2008 (p. 16, fig. 2).

Diagnostic characters. Solid, subtrigonal shell; rostrate posterior side; faint concavity on the postero-ventral margin; weak commarginal cordlets; obtuse commarginal ridges corresponding to growth discontinuities. Prodissoconch: shell type ST-1A; P-1: length about 160 µm; ellipsoidal outline; convex profile; surface with irregular wrinkles then weak radials; transition to the nepioconch weakly marked.

Remarks. Yoldiella seguenzae Bonfitto & Sabelli, 1995 , is currently regarded as a junior synonym (CLEMAM 2016); see La Perna (2008) for the full nomenclatural history of this long-debated species.

Occurrence. Box-corer samples BC66 (1 specimen), BC72 (2). Maximum length: 3.5 mm.

Distribution and habitat. The species occurs in the NE Atlantic to the Azores and in the Mediterranean, dwelling in detritus from 500 to 2000 m but more typically in bathyal deeper horizons (Di Geronimo & La Perna 1997; Pons-Moyà & Pons 2000; La Perna 2003, 2008; Di Geronimo et al. 2005).

Fossil record. Pliocene of Italy ( Tabanelli 2008); abundant in bathyal Pleistocene deposits of southern Italy (Di Geronimo & La Perna 1997; La Perna 2003; Di Geronimo et al. 2005). The type specimens are from the Pleistocene of Sicily .

Figures

FIGURE 3. a – c: Yoldiella nana (Sars M., 1865); RV (b, c) and LV (a), sample BC 72, scale bars: 0.5 mm (a – b), 0.1 mm (c, prodissoconch); d – f: Yoldiella philippiana (Nyst, 1844); RV, sample BC 72, scale bars: 1 mm (d – e), 0.1 mm (f, prodissoconch); g – i: Yoldiella striolata (Brugnone, 1876); RV, sample BC 72, scale bars: 1 mm (g – h), 0.1 mm (i, prodissoconch); j – m: Asperarca nodulosa (Müller, 1776); LV, sample BC 11, scale bars: 5 mm (j – k), 1 mm (l, juvenile), 0.1 mm (m, prodissoconch).