Volutospina nodosa

Volutospina nodosa

(J. de C. Sowerby, 1823)

Common name Volute
Fossil group Molluscs
Order Neogastropoda
Family Volutidae
Genus Volutospina
Taxonomic status Taxonomically Uncertain
Geological age Ypresian

Summary

Volutospina nodosa was a stout, conspicuously spiny volute that lived on the London Clay seabed. Its shell had a short spire, a broad inflated body whorl and a strongly angled shoulder carrying large nodes or short spines, giving it a much more heavily armoured appearance than smoother volutes.

Its diet is not directly preserved. Comparison with living volutes suggests that it was probably an active benthic carnivore, moving over soft sediment on a muscular foot and taking shelled or soft-bodied animal prey. That feeding interpretation is an inference from its relatives rather than direct evidence from the fossil itself.

Quick Identification

Look for: a stout, low-spired volute with an inflated body whorl and a sharply angulated shoulder carrying one row of large, widely spaced blunt nodes or short spines; fine spiral cords cover the flank below the shoulder.

Diagnostic Features

  • Spire is short and conical relative to the large body whorl.
  • The body whorl has a strongly angulated shoulder.
  • A single shoulder row carries large, widely spaced blunt nodes or short spines.
  • Strong axial folds descend from the shoulder nodes onto the flank.
  • Numerous fine spiral cords cross the flank and base between the axial folds.

Fossil Details

Typical size
About 38 mm.
Fossil material
Shell, Internal Mould / Cast
Preservation
Shoulder nodes are easily chipped and the outer lip and siphonal end are commonly incomplete. Abrasion may reduce the sculpture enough to obscure the characteristic nodose outline.

Similar Species

Recorded Fossil Sites

No fossil-site occurrences have yet been recorded for this species.

References

  • Barnet, J. (2025). Eocene gastropods of the New Forest, UK. Geology Today, 41(1), 26–37 View reference
  • Jeffery, P.; Tracey, S. (1997). The Early Eocene London Clay Formation mollusc fauna of the former Bursledon Brickworks, Lower Swanwick, Hampshire. Tertiary Research, 17(3–4), 75–137 View reference
Last Reviewed
15 August 2026 Reviewed by Sam Harris