The Echinoid Directory

Sanchezaster Lambert, in Sanchez Roig, 1924, p. 13

Diagnostic Features
  • Test cordate with shallow anterior sulcus. Lower surface usually flattened but test generally crushed and almost certainly more rounded in life
  • Apical disc somewhat anterior of centre with ?four gonopores. Anterior and posterior pairs of genital plates separated by ocular plates
  • Paired ambulacra non-petaloid; pore-pairs rudimentary. Ambulacral plates relatively tall over aboral surface
  • Frontal groove present from about the ambitus and continuing to peristome
  • Peristome small and oval, facing into the frontal groove
  • Plastron plating meridosternous - labral plate followed by single symmetrical sternal plate
  • Episternal plates paired and symmetrical
  • Plastron disjunct: ambulacral plates separate the labral plate from the sternal plate
  • Enlarged primary tubercles absent aborally
  • Marginal fasciole present
Distribution
Eocene - Oligocene, Cuba
Name gender masculine
Type
Sanchezaster habanensis Lambert in Sanchez Roig, 1924, p. 13, by original designation
Species Included
  • Only the type species
Classification and/or Status

Holasteroida, Meridosternata, Stegasterina, Calymnidae

Monotypic; a subjective junior synonym of Sternopatagus de Meijere 1902

Remarks

The Cuban type material has been redescribed by Kier (1984). Differs from Chelonechinus in having a frontal groove and sulcus leading to the peristome. The modern Sternopatagus has similar plastron plating, but the plastron is narrower.

Kier, P.M. 1984. Fossil spatangoid echinoids from Cuba. Smithsonian Contributions to Paleobiology 55, 336 pp., 90 pls.

Sanchez-Roig, M. 1924. Revision de los equinidos fosiles Cubanos. Memorias de la Sociedad Cubana de Historia Natural "Felipe Poey". 6, 6-50, pls 1-7.