Drilliola emendata (Monterosato, 1872)

Fig. 14 n–p

Taranis emendata Monterosato, 1872 (p. 17, 34).

Homotoma emendatum Monterosato—Hidalgo, 1917 (p. 355).

Asthenotoma (Drilliola) emendata (Monterosato) — Nordsieck 1968 (p. 157, pl. 26, fig. 91.10); Di Geronimo & Panetta 1973 (p. 83, pl. 1, figs. 8–9); Di Geronimo 1975 (p. 127, pl. 1, fig. 8).

Drilliola emendata (Monterosato, 1870) — Nordsieck 1977 (p. 18, pl. 2, fig. 13).

Drilliola emendata (Monterosato) — Sabelli & Spada 1977 (p. 2, fig. 5; not fig. 6 = Drilliola loprestiana).

Drilliola emendata (Monterosato, 1872) — Bouchet & Warén 1980 (p. 32, figs. 29, 83, 207); Cossignani et al. 1992 (fig. 173); Repetto et al. 2005 (p. 205, top right fig.).

Diagnostic characters. Slender fusiform shell; obliquely oval aperture; moderately long and twisted siphonal canal; shallow C-shaped anal sinus; thin spiral keels (the most prominent placed halfway between sutures) increasing in number by intercalation during growth; dense and very sinuous superimposed collabral riblets; base with several distinct spiral cords. Protoconch: stout, low conical; slightly less than 2.5 whorls; diameter about 870 µm; height about 840 µm; surface finely granulated; spiral keel at the abapical third; adapical weaker keel high on first whorl, later reduced; faint axial ribs on the last 0.5 whorl; transition to the teleoconch ill-defined, marked by the appearance of the adult sculpture.

Occurrence. Box-corer samples BC67 (1 specimen), BC72 (3); core BC72 (1). Maximum height: 8 mm.

Distribution and habitat. Drilliola emendata is distributed across the Mediterranean; in the Atlantic it seems to be restricted to Iberian and northwestern African coasts. It is a bathyal species sporadically found at circalittoral depths (Hidalgo 1917; Di Geronimo & Panetta 1973; Bouchet & Warén 1980; Di Geronimo et al. 2001).

Fossil record. Upper Miocene to Lower Pliocene of Malaga, Spain (Vera-Pelaez et al. 1999); Pliocene of Sicily (Monterosato 1872; Cipolla 1914); Pleistocene of southern Italy (Di Geronimo 1975; Di Geronimo & La Perna 1997; Di Geronimo et al. 2005).