Contributed by Andrew Smith, November 2011
|Distribution||Oligocene? (possibly Eocene), Japan|
|Type||Glyptocidaris (Eoglyptocidaris) arctina Nisiyama 1966, p. 196, by original designation.|
|Species Included||Only the type species.|
|Classification and/or Status||Carinacea, Stomopneustoida, Glyptocidaridae
Treated as a junior subjective synonym of Glyptocidaris.
|Remarks||Very close to Glyptocidaris but supposedly differs from that genus "by the structure of ambulacral plates and by the tuberculation on interambulacral plates". In reality the plate compounding illustrated by Nisiyama (1966, fig. 7) is identical to that shown by Mortensen for adapical plates of G. crenularis, and little distinguishes the tuberculation pattern.
Nisiyama, S. 1966. The echinoid fauna from Japan and adjacent regions. Part 1. Palaeontological Society of Japan Special Papers 11, 1-277, pls 1-18.