Contributed by Andrew Smith, August 2011
|Distribution||Lower Cretaceous (Barremian), Japan|
|Type||Pseudowashitaster mysticus Takana, in Takana & Kozai, 1982, p. 348|
|Species Included||Only the type species|
|Classification and/or Status||
|Remarks||In overall morphology this is very close in appearance to Heteraster but differs in having a well defined peripetalous fasciole and less heterogeneous pore-pairs in its anterior ambulacrum. While toxasterids in general lack fascioles, partially developed bands occur in Washitaster and this taxon is better considered as a toxasterid that has independently evolved a peripetalous fasciole than as a hemiasterid convergent on Heteraster.
Takana, K. & Kozai, T. 1982. Some Cretaceous echinoids from the Monobe area, central Shikoku. Transactions and Proceedings of the Palaeontological Society of Japan 126, 341-355.