Description

Haplophrentis carinatus with helens

Middle Cambrian
Burgess Shale, Stephens Formation
Field, British Columbia
Canada

24mm on 48mm x 43mm slab. Haplophrentis is a hyolith, a problematic group of conical shelled animals found only in the Paleozoic. Traditionally grouped with molluscs, their taxonomic status is still uncertain.