The Echinoid Directory

Cavanechinus Browne, 1967, p. 158

Diagnostic Features
  • Test shape unknown; plating strongly imbricate.
  • Apical disc unknown.
  • Ambulacra biserial, narrow, each plate with a slightly elongate pore-pair, adradially placed. Strongly imbricate adapically and adradially. Plates too worn to identify tuberculation pattern.
  • Interambulacral zones wide; composed of 7-8 columns of strongly imbricate plates, more or less similar in size and apparently arranged into regular rows. Plates with a small tubercle offset towards one corner; too badly worn to identify whether these are perforate/imperforate.
  • Peristome and lantern unknown.
  • Small, simple, hollow spines without cortex.
Distribution
Middle Devonian, New South Wales, Australia.
Name gender masculine
Type
Cavanechinus warreni Browne, 1967, p. 160, by original designation.
Species Included
  • Only the type species.
Classification and/or Status

Stem group Echinoidea; Lepidocentridae.

Monotypic; probably a subjective junior synonym of Palaeodiscus Salter, 1857.

Remarks

The biserial ambulacral zones and the regularly arranged rhomboidal plates with a small off-centre tubercle places this in the Lepidocentridae. It is very incompletely known and thus difficult to compare with other genera. The pore-pairs are wider than in the type species of Palaeodiscus, but this seems inadequate to maintain the two genera as separate.

Browne, I. A. 1967. A Devonian echinoid from Taemas, South of Yass, N. S. W. Proceedings of the Linnean Society of New South Wales 92, 157-161.