The Echinoid Directory

Goniosigma Fell, 1964, p. 201

Diagnostic Features
  • Test low domal.
  • Apical disc unknown.
  • Ambulacra about half the width of the interambulacra; plating trigeminate. Pore-pairs obviously offset in arcs of three forming an adradial band. Each plate with a prominent adradial primary tubercle; wide perradial zone with just sparse secondaries and miliaries.
  • Interambulacral plates much wider than tall. A distinct central primary tubercle with two smaller flanking secondaries on either side on ambital plates. Smaller miliaries and granules scattered over remainder of plate.
  • Strong epistromal ornament of ridges, forming rather distinct zig-zag pattern (parallel to plaste sutures) interradially.
  • Peristome unknown.
  • Spines and lantern unknown.
Oligocene, New Zealand.
Name gender neuter
Echinus enysi Hutton, 1873, p. ** by original designation.
Species Included
  • Only the type species.
Classification and/or Status

Euechinoidea; Camarodonta; Temnopleuroida; Trigonocidaridae.



Philip (1969) suggested that Goniosigma enysi belonged to Grammechinus. However, Grammechinus is a toxopneustid and lacks sculpting.

Fell, H. B. 1964. Oligocene echinoids from the Trelissic Basin, New Zealand. Transactions of the Royal Society, New Zealand 4(15), 201-205, pls 1-4.

Philip, G. M. 1969. The Tertiary echinoids of South-Eastern Australia IV. Camarodonta (2). Royal Society of Victoria Proceedings 82, 233-275, pls 3-16.