Triakis wardi

Triakis wardi

Cappetta, 1976

Common name Hound shark
Fossil group Sharks & Rays
Order Carcharhiniformes
Family Triakidae
Genus Triakis
Taxonomic status Accepted
Geological age Ypresian

Summary

Triakis wardi was a hound shark and part of the diverse carcharhiniform fauna of the early Eocene. Like living Triakis and other triakids, it was probably an active shelf predator that moved between the seabed and lower water column in search of manageable prey.

Its low asymmetrical teeth formed a cutting and gripping edge suited to a varied diet rather than a single specialised food source. Small fishes, crustaceans and other invertebrates are all plausible prey.

The species is known mainly from isolated teeth, so its exact body size and behaviour cannot be reconstructed. It nevertheless records the presence of versatile, relatively small predatory sharks within the London Clay ecosystem alongside much larger and more specialised hunters.

Quick Identification

Look for: a low, asymmetrical hound-shark tooth with an oblique central cusp, an extended distal shoulder or heel and a broad low root; compare complete teeth against Galeorhinus and Pachygaleus.

Diagnostic Features

  • Principal cusp is low and inclined distally.
  • Distal crown shoulder is elongated and contributes to the cutting edge.
  • Crown is distinctly asymmetrical in lateral tooth positions.
  • Root is broad and low with paired lobes.
  • Combination of cusp angle and heel proportions separates the morphotype from other London Clay triakids.

Fossil Details

Preservation
The distal shoulder is easily chipped, while rolling rounds the low crown. Incomplete teeth are often safer as Triakidae indet.

Similar Species

Recorded Fossil Sites

References

  • Cappetta, H. (1976). Sélaciens nouveaux du London Clay de l’Essex (Yprésien du Bassin de Londres). Geobios, 9(5), 551–575 View reference
  • Rayner, D.; Mitchell, T.; Rayner, M. (2009). London Clay Fossils of Kent and Essex. 228 pp.. Medway Fossil and Mineral Society, Rochester, Kent View reference
Last Reviewed
10 August 2026 Reviewed by Sam Harris