Antalis agilis (Sars M. in Sars G.O., 1872 )

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 : 49

Antalis agilis (Sars M. in Sars G.O., 1872)

Fig. 11 a–c

Dentalium agile Sars M. in Sars G.O, 1872 (p. 31, pl. 3, figs. 4–15).

Dentalium agile M. Sars—Jeffreys 1883 [a] (p. 658).

Dentalium agile Sars—Hidalgo 1917 (p. 280).

Dentalium ( Antalis) agile Sars—Di Geronimo 1974 (p. 152, pl. 2, fig. 5). Dentalium ( Antalis) agile Sars—Di Geronimo 1975 (p. 130).

Dentalium ( Antalis) agile M. Sars, 1872 — Caprotti 1979 (p. 226, pl. 8, figs. 4–5). Dentalium agile Sars, 1872 — Poppe & Goto 1993 (p. 33, pl. 1, fig. 1). Graptacme agilis (Sars M. in Sars G.O.) — Di Geronimo et al. 1997 (pl. 2, fig. 17). Graptacme agilis (M. Sars in G.O. Sars) — Di Geronimo et al. 2001 (pl. 1, fig. 15). Antalis agilis (Sars M. in Sars G.O., 1872) — Repetto et al. 2005 (p. 357, top left fig.). Dentalium agile Sars M. in Sars G.O, 1872 — Beck et al. 2006 (p. 112, top fig.). Antalis agilis Sars M., 1872 —Mastrototaro et al. 2010 (fig. 5 m).

Diagnostic characters. Solid, moderately curved shell; circular apertures; anal aperture with a V-shaped lateral notch; fine longitudinal riblets increasing in number during growth and often vanishing on older stages. Larval shell: not available.

Occurrence. Box-corer samples BC04 (9 specimens), BC05 (2), BC06 (2), BC67 (7), BC70 (5), BC71 (2), BC72 (37); cores BC04 (12), BC05 (13), BC21 (6), BC51 (25), BC52 (1), BC67 (4), BC72 (7). Maximum length: 27 mm.

Distribution and habitat. Antalis agilis is distributed from Norway to the Azores and the Mediterranean, dwelling in mud in the 55–4789 m depth interval ( Buhl-Mortensen & Høisaeter 1993; Poppe & Goto 1993; Pons- Moyà & Pons 1999). It was regarded as an exclusive characteristic element of VP (bathyal mud) biocoenosis ( Pérès & Picard 1964; Di Geronimo 1979[a]; Di Geronimo & Bellagamba 1985). In the Santa Maria di Leuca CWC biotope, it was found on muddy bottoms around coral colonies (Mastrototaro et al. 2010), being common in Gryphus-Isidella and mollusk mud thanatofacies (Rosso et al. 2010).

Fossil record. The species seems to appear in the Mediterranean in Middle-Upper Pliocene (Piacenzian), becoming dominant in Pleistocene bathyal deposits ( Caprotti 1979; Di Geronimo & Bellagamba 1985; Di Geronimo et al. 1997; Di Geronimo & La Perna 1997; Di Geronimo et al. 2005; Tabanelli 2008).

Figures

FIGURE 11. a – c: Antalis agilis (Sars M. in Sars G. O., 1872), samples BC 04 (a) and BC 72 (b – c), scale bars: 5 mm (a), 0.2 mm (b, posterior aperture), 1 mm (c, anterior aperture); d – f: Entalina tetragona (Brocchi, 1814), sample BC 72, scale bars: 2 mm (d), 0.1 mm (e, posterior aperture), 0.5 mm (f, anterior aperture); g: Cadulus subfusiformis (Sars M., 1865), sample BC 52, scale bar 0.5 mm; h – k: Propilidium exiguum (Thompson, 1844), sample BC 66, scale bars: 1 mm (h – i), 0.1 mm (j – k, protoconch); l – n: Emarginula adriatica (Costa O. G., 1830), sample BC 72, scale bars: 2 mm (l – m), 0.1 mm (n, protoconch); o – q: Emarginula multistriata Jeffreys, 1882, sample BC 70, scale bars: 1 mm (o – p), 0.1 mm (q, protoconch); r – t: Emarginula tenera Locard, 1982, sample BC 71, scale bars: 1 mm (r – s), 0.1 mm (t, protoconch).