Lacuna parva (da Costa, 1778)

Bouchard, Blanche, Wesselingh, Frank P., Pouwer, Ronald & Landau, Bernard, 2025, The Gelasian gastropod fauna of Selsoif (Manche, France), Geodiversitas 47 (3), pp. 39-91 : 56

Lacuna parva ( da Costa, 1778)

( Fig. 7E 1-E 3 )

Cochlea parva da Costa, 1778: 85.

Turbo puteolus Turton, 1819: 193 , figs 90, 91.

Lacuna puteolus – Harmer 1921: 666, pl. 53, fig. 26.

Lacuna parva – Fretter & Graham 1980: 248, figs 199-200. — Moerdijk & Janse 2015: 22, fig. 10.

MATERIAL AND DIMENSIONS. — Maximum height 3.5 mm, width 3.4 mm RGM.1364980 (4), leg. ACJ; RGM.1365183 (1), leg. ACJ.

SPECIES CHARACTERISATION. — Small ovate shell. Three smooth, round teleoconch whorls. Last whorl is 77% of total shell. Aperture round with a thick peristome, columella expanded and flattened abapically. Broad umbilical chink.

DISTRIBUTION. — Lower Pleistocene: Atlantic, Selsoif, NW France (this paper). — Lower and Upper Pleistocene: England and Ireland ( Harmer 1921). — Upper Pleistocene: Netherlands ( Wolf 2001). — Holocene: NSB ( Strand Petersen 2004). Today predominantly a northern species extending from south of the Arctic Circle on the American coast to Cape Cod, in the eastern Atlantic British Isles, Norway, Sweden ( Fretter & Graham 1980), North Sea of Belgium ( Backeljau 1986). The species is associated with algae such as Fucus below the low water tide line (e.g., Ockelmann & Nielsen 1981).

Figures

FIG. 7. — Gastropods from Selsoif. All illustrated specimens are collected from the Sablière du Grand Marais,Selsoif,France and come from the Early Pleistocene Saint-Nicolas de Pierrepont Formation (continuation): A, Boreoscala similis (J. de C. Sowerby, 1813), RGM.1365181, leg WG, H = 6.5 mm; B, Boreoscala similis (J. de C. Sowerby, 1813), RGM.1364911, leg WG, H = 9.3 mm; C, Lacuna crassior (Montagu, 1803), RGM.1365195, leg WG, H = 3.5 mm; D, Lacuna pallidula (da Costa, 1778), RGM.1365182, leg AWJ, H = 2.1 mm; E, Lacuna parva (da Costa, 1778), RGM.1365183, leg ACJ, H = 2 mm; F, Lacuna cf. vincta (Montagu, 1803), RGM.1364982, leg ACJ, H = 1.9 mm; G, Littorina obtusata (Linnaeus, 1758), RGM.1365211, leg ACJ, H = 2.3 mm; H, Littorina obtusata (Linnaeus, 1758), RGM.1310829,leg WG,H = 8.4 mm;I, Littorina littorea (Linnaeus,1758),RGM.1365070,leg AWJ,H = 6 mm;J, Littorina littorea (Linnaeus,1758),RGM.1365202A, leg AWJ, H = 3.02 mm. Scale bars: A, B, 2 mm; C, J, 1 mm; D-G, 500 μm; H, 5 mm; I, 2 mm.

FIG. 1. — Simplified geological map of the Normandy region (after Dugué et al. 2000 and Pareyn 1987) showing the location of Selsoif:1, Precambrian-Palaeozoic basement; 2, Permo-Mesozoic Paris Basin fill; 3, Neogene-Quaternary subbasins.

FIG. 3. — Simplified biographic map of South-West of Europe (after Landau et al. 2011).