Archaeocarabus bowerbanki

Archaeocarabus bowerbanki

M'Coy, 1849

Common name Spiny Lobster
Fossil group Crustaceans
Order Decapoda
Family Palinuridae
Genus Archaeocarabus
Taxonomic status Accepted
Geological age Ypresian

Summary

Archaeocarabus bowerbanki was a spiny lobster, part of the same broad group as the long-antennaed rock lobsters living today. It would have spent most of its time on the sea floor, using its heavily armoured body and long sensory antennae to explore its surroundings. Like living spiny lobsters, it was probably an opportunistic feeder, taking small animals and carrion rather than chasing fast prey in open water.

In the warm early Eocene London Clay sea it would have shared the seabed with crabs, molluscs, fish and other lobsters. Spiny lobsters are especially interesting because, unlike clawed lobsters such as Homarus and Hoploparia, their defence depended more on armour, spines and powerful antennae than on a pair of large crushing claws.

Quick Identification

Look for: an elongate spiny-lobster carapace with a robust palinurid form, clearly developed regional grooves and surface ornament; species-level identification should match the overall carapace pattern illustrated for Archaeocarabus rather than relying on an isolated fragment.

Diagnostic Features

  • Carapace elongate and lobster-like rather than broad and crab-like.
  • Palinurid construction lacks the enlarged paired chelae characteristic of clawed nephropid lobsters.
  • Regional grooves divide the carapace into recognisable cephalic and branchial areas.
  • Dorsal surface is distinctly ornamented rather than uniformly smooth.
  • Species-level identification requires the combined carapace shape, groove pattern and ornament; isolated limb pieces are not diagnostic.

Fossil Details

Typical size
Centimetre-scale carapace; a reliable species-wide size range is not established.
Fossil material
Carapace, Crustacean Appendage
Preservation
Carapaces may be crushed, split along the cuticle or preserved as internal and external moulds. Abrasion can remove fine ornament and make separation from other palinurid lobsters less secure.

Similar Species

Recorded Fossil Sites

References

  • J. S. H. Collins; C. J. T. Mellish; A. J. Ross; P. R. Crabb; S. K. Donovan. (2020). A guide to the fossil Decapoda (Crustacea: Axiidea, Anomura, Brachyura) of the British Isles. Proceedings of the Geologists' Association, 131(1), 19–50 View reference
  • Thomas Bell. (1857). A monograph of the fossil malacostracous Crustacea of Great Britain. Part I. Crustacea of the London Clay. Monograph of the Palaeontographical Society, 10, i–viii, 1–44. Palaeontographical Society, London View reference
  • 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