Homarus morrisi

Homarus morrisi

Quayle, 1987

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

Summary

Homarus morrisi was a clawed lobster related to the broader group that includes living Homarus lobsters. It would have walked over the seabed using large front claws to seize food, defend itself and manipulate prey. Like modern clawed lobsters it was probably an opportunistic predator and scavenger.

A robust lobster like this would have been one of the larger mobile crustaceans in the London Clay ecosystem. It shared the sea floor with other clawed lobsters, spiny lobsters and crabs, showing that several different large crustacean feeding strategies coexisted in the same warm Eocene sea.

Quick Identification

Look for: a robust clawed-lobster carapace and associated chelae matching Quayle’s Homarus morrisi morphology; compare the carapace groove pattern and claw construction directly with London Clay Hoploparia.

Diagnostic Features

  • Nephropid body plan with a robust elongate carapace.
  • First pereiopods form enlarged true chelae.
  • Carapace bears a consistent set of cervical and branchial grooves.
  • Overall carapace and chela proportions differ from the London Clay Hoploparia species.
  • Identification should use the full revised character combination rather than claw size alone.

Fossil Details

Typical size
Several-centimetre lobster; isolated claws and carapaces are more common than complete bodies.
Fossil material
Carapace, Claw / Chela, Crustacean Appendage
Preservation
Carapaces are often compressed or incomplete and chelae may occur detached. Wear can remove groove detail or finger dentition, reducing confidence in Species-level identification.

Similar Species

Recorded Fossil Sites

References

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