The Echinoid Directory

Oolaster Laube, 1869, p. 451

Diagnostic Features	Test large and ovate with flat base and low, vaulted upper surface; no anterior sulcus. Apical disc relatively large; details unknown. All ambulacra flush, with small rounded pore-pairs adapically. Plastron plating unknown from description. Periproct inframarginal. No enlarged primary tubercles aborally. No fascioles.
Distribution	Supposedly from the Eocene of Mattsee, Austria, but Lambert & Thiery (1920, p. 418) attribute it to the Campanian, noting that at this locality the Eocene is in direct contact with the Upper Cretaceous.
Name gender	masculine
Type	Oolaster mattseensis Laube, 1869, p. 455, by original designation.
Species Included	Monotypic.
Classification and/or Status	Holasteroida, Meridosternata, Echinocorythidae. Subjective synonym of Echinocorys Leske.
Remarks	Identical in all respects to certain Campanian forms of Echinocorys scutata (Leske). The only reason Laube did not consider it an Echinocorys was because of its young age. Given the occurrence of Upper Cretaceous immediately in contact with bedding near vertical, there must remain doubt as to the correct age assignment of this taxon (see above). Laube, G. C. 1869 Ueber Oolaster, ein neues Echinoiden-Geschlecht aus den eocanen Ablagerungen von Mattsee in Oberosterreich. Neues Jahrbuch fur Mineralogie, Geologie und Palaontologie 1869, 451-455.