The Echinoid Directory

Contributed by Andrew Smith, August 2011

Gajechinus Lambert & Thiery, 1914, p. 242

Diagnostic Features
  • Test crushed; upper suface only preserved
  • Apical disc unknown
  • Ambulacra slightly more than half interambulacral width; plating trigeminate with echinoid plate compounding. Pore-pairs in arcs
  • Interambulacral plates with single primary tubercle, non-contiguous in vertical series. Secondary tubercles present
  • Primary tubercles imperforate and non-crenulate
Distribution Miocene, Pakistan
Name gender masculine
Type Echinus subcrenatus Duncan & Sladen, 1885, p. 317, by original designation
Species Included Only the type species.
Classification and/or Status Camarodonta, Echinoida, incertae sedis
Remarks Too poorly known to be placed with any confidence.  The plate compounding and non-crenulate tubercles suggest membership of the Echinoida.

Duncan, P. M., & Sladen, P. W. 1885. The fossil Echinoidea from the Gaj or Miocene Series. Memoirs of the Geological Survey of India, Palaeontologia Indica. Tertiary and Upper Cretaceous fossils of western Sind 14, Volume 1 (3). The Fossil Echinoidea. Fasciculus V, 273-367, pls 44-55.

Lambert, J. & Thiery, P. 1914, in 1909-1925 Essai de nomenclature raisonee des echinides. Chaumont.