Steromphala tumida ( Montagu, 1803 )

Bouchard, Blanche, Wesselingh, Frank P., Pouwer, Ronald & Landau, Bernard, 2025, The Gelasian gastropod fauna of Selsoif (Manche, France), Geodiversitas 47 (3), pp. 39-91 : 48

publication ID	https://doi.org/10.5252/geodiversitas2025v47a3
publication LSID	urn:lsid:zoobank.org:pub:BE95BEFE-D4E3-4138-B9BE-5A5656BEA68F
DOI	https://doi.org/10.5281/zenodo.14850445
persistent identifier	https://treatment.plazi.org/id/8F310D3D-9557-FFBC-CDDA-F888838C6D9A
treatment provided by	Plazi
scientific name	Steromphala tumida ( Montagu, 1803 )
status

Treatment

Steromphala tumida ( Montagu, 1803) View in CoL ( Fig. 4J View FIG 1-J View FIG 3 View FIG )

Trochus tumidus Montagu, 1803: 280 View in CoL , pl. 10, fig. 4.

Trochus (Gibbula) tumidus View in CoL – Harmer 1923: 733 (partim, pl. 59, fig. 11, not pl. 59, fig. 10) (Upper Pleistocene-Recent records only).

Gibbula tumida View in CoL – Pouwer & Wesselingh 2012: 152, fig. 4 (non Gibbula tumida Símonarson & Eiríksson View in CoL in Eiríksson & Símonarson, 2021).

MATERIAL AND DIMENSIONS. — Height 4.8 mm. — RGM.1310832 (1), leg. SM; n.n. (8), leg. SM.

SPECIES CHARACTERISATION. — This small Steromphala species is characterised by rounded shoulders, fine and slightly irregular spiral ribbing, very strong prosocline growth-lines, a subquadrate aperture with a slight chink on the columella.

DISTRIBUTION. — Lower Pleistocene: Atlantic, Selsoif, France (this paper). — Late Pleistocene: Channel region, Selsey, west coast of Scotland, Largo bay, Belfast, Livorno ( Italy) and Christiana Fjord and Trondhjem in Norway (Harmer 1923). — Recent: Iceland and northern Norway to Gibraltar ( Pouwer & Wesselingh 2012; Harmer 1923).