The Echinoid Directory

Psilocidaris Mortensen, 1927, p. 282

Diagnostic Features	Apical disc a little more than half the test diameter; much larger than peristome. Interambulacra with large primary tubercle; tubercles perforate and non-crenulate with incised areoles. A prominent naked zone runs down the interradius. Ambulacral pore-pairs oblique and non-conjugate with raised interporal partition. Marginal tubercle on each plate plus a smaller secondary tubercle. Primary spines very long (3-5 times test diameter); no terminal crown or basal disc. shaft ornamented with short, erect, conical stumps. Secondary spines simple, not adpressed.
Distribution	Recent, Philippines
Name gender	feminine
Type	Psilocidaris echinulata Mortensen, 1927, p. 283, by original designation
Species Included	Only the type species
Classification and/or Status	Cidaroida, Cidaridae, Goniocidarinae. Monotypic
Remarks	Mortensen, T. 1928. A monograph of the Echinoidea. 1, Cidaroidea. C. A. Reitzel, Copenhagen.