Hoploparia wardi

Hoploparia wardi

Quayle, 1987

Common name Clawed Lobster
Fossil group Crustaceans
Order Decapoda
Family Nephropidae
Genus Hoploparia
Taxonomic status Accepted
Geological age Ypresian

Summary

Hoploparia wardi was a clawed lobster sharing the London Clay sea with several other nephropid lobsters. It was probably a bottom-dwelling predator and scavenger, using strong chelae to handle prey such as smaller crustaceans and molluscs as well as feeding on dead animals.

Having several closely related lobster species in the same formation suggests that the London Clay seabed offered a range of ecological opportunities. Differences in body proportions, feeding structures and habitat preference may have reduced direct competition between them.

Quick Identification

Look for: a well-preserved Hoploparia carapace whose proportions, groove arrangement and surface detail match Quayle’s H. wardi material; incomplete claws alone should normally remain at genus or family level.

Diagnostic Features

  • Elongate nephropid carapace with a distinct regional groove pattern.
  • Robust paired chelae may occur with articulated or associated material.
  • Carapace proportions differ from Hoploparia gammaroides in revisionary comparisons.
  • Surface detail and groove intersections provide useful Species-level characters.
  • Identification requires several overlapping features; isolated chela fragments are not sufficient.

Fossil Details

Typical size
Several-centimetre lobster; reliable species-wide range is not established.
Fossil material
Carapace, Claw / Chela, Crustacean Appendage
Preservation
Carapace compression and detached chelae are common. Weathering may soften grooves and remove the rostral or marginal features needed to distinguish H. wardi from H. gammaroides.

Similar Species

Recorded Fossil Sites

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

References

  • W. J. Quayle. (1987). English Eocene Crustacea (lobsters and stomatopod). Palaeontology, 30(3), 581–612 View reference
Last Reviewed
16 August 2026 Reviewed by Sam Harris