Peringia ulvae (Pennant, 1777)

(Fig. 9D 1-D 3)

Turbo ulvae Pennant, 1777: 132, pl. 86, fig. 120.

Paludestrina ulvae – Wood 1848: 71, pl. 4, fig. 23.

Peringia ulvae – Harmer 1925: 873, pl. 65, fig. 27. — Fretter & Graham 1978: 122, fig. 113. — Hoeksema & Raad 2015: 25, fig. 1.

Hydrobia ulvae – Van Regteren Altena et al. 1954: 12, pl. 3, fig. 32. — Símonarson & Eiríksson in Eiriksson & Símonarson 2021: 255, pl. 7.2, fig. 7.

MATERIAL AND DIMENSIONS. — Maximum height 2.1 mm, width 1.1 mm. — RGM.1364993 (10), leg. ACJ; RGM.1365198 (1), leg. ACJ; RGM.1365202 (200+), leg. AWJ .

SPECIES CHARACTERISATION. — Smooth, solid, fusiform shell with regularly conical spire. Five flat teleoconch whorls separated by shallow suture. High base; pyriform aperture.

DISTRIBUTION. — Lower Pliocene: NSB, Coralline Crag, England (Wood 1848), Iceland (Símonarson et al. 2021). — Upper Pliocene: NSB, Red Crag, England (Harmer 1925; Norton 1967). — Lower Pleistocene: Atlantic, England (Harmer 1925), Selsoif,NW France (this paper). — Upper Pleistocene to Holocene: NSB, England (Harmer 1925), Netherlands (Van Regteren Altena et al. 1954; Hoeksema & Raad 2015). Today, this species occurs in the eastern Atlantic from northern Norway (Bank & Neubert 2020), along the coast of Europe to Senegal (Fretter & Graham 1978), it enters the Mediterranean and extends into the Aegean Sea (Öztürk et al. 2014) and Baltic Sea (Kedra 2010).