Haplophrentis

Haplophrentis
Temporal range:
Reconstruction of Haplophrentis
Scientific classification
Kingdom: Animalia
Class: †Hyolitha
Order: †Hyolithida
Family: †Hyolithidae
Genus: †Haplophrentis
Matthew, 1899
Species
  • H. carinatus (Matthew, 1899) (= H. cecrops Walcott)
  • H. reesei Babcock & Robison 1988 (type)

Haplophrentis is a genus of tiny shelled hyolithid which lived in the Cambrian Period. Its shell was long and conical, with the open end protected by an operculum, from which two fleshy arms called helens protruded at the sides. These arms served to elevate the opening of the shells above the sea floor, acting like stilts.

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