Aclis minor

Aclis minor (Brown, 1827) (Fig. 10D 1-D 3) Turritella minor Brown, 1827: pl. 57, figs 57-58. Aclis minor – Van Regteren Altena et al. 1955: 33, fig. 77. — Menkhorst & Wesselingh 2018: 42, figs 13, 14. — Landau & Mulder 2022: 161, figs 10a-c. For more, see synonymy list in Landau & Mulder (2022). MATERIAL AND DIMENSIONS. — Maximum height 1.8 mm (incomplete), width 0.6 mm. — RGM.1365077 (11), leg. AWJ; RGM.1365257 (1), leg. AWJ. SPECIES CHARACTERISATION. — Small, turriform shell with narrow apical angle. Protoconch absent in all specimens. About six convex teleoconch whorls separated by narrowly impressed suture. Three spiral cords on early whorls, a fourth one appearing above the suture on later whorls; aperture ovate. DISTRIBUTION. — Upper Miocene: NSB, Denmark (Rasmussen 1968; Schnetler 2005), Germany (Moths 1989). — Lower Pliocene: NSB, Coralline Crag, England (Wood 1842, 1848; Harmer 1925); central Mediterranean, Italy (Chirli 2009; Brunetti & Cresti 2018). — Upper Pliocene: western Mediterranean, S Spain (Landau et al. 2006; Landau & Mulder 2022). — Lower Pleistocene: NSB, England, Ireland (Harmer 1925); Atlantic, Selsoif, NW France (this paper); central Mediterranean, Italy (Cerulli-Irelli 1914); eastern Mediterranean, Rhodes Island (Chirli & Linse 2011). — Pleistocene (indeterminate): NSB, Netherlands (Van Regteren Altena et al. 1955; Menkhorst & Wesselingh 2018). — Holocene: NSB (Strand Petersen 2004). Today this species is present in the Atlantic, from the British Isles (Guiry & Guiry 2011) to Madeira (Segers et al. 2009) and in the Mediterranean Sea from Spain (Peñas et al. 2009) to the Aegean Sea (Öztürk et al. 2014), at depths of 2-250 m, on calcareous algae, sandy, or muddy bottoms (Albanesi et al. 1981).