|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
It was assigned to Phragmactidae by Spencer (1951) and Owen (1965); to Stenurida by Sepkoski (2002); to Asterozoa by Spencer (1940) and Dean Shackleton (2005); and to Phragmactinidae by Spencer and Wright (1966) and Blake (2014).
Is something missing? Join the Paleobiology Database and enter the data
|J. Dean Shackleton 2005||Madreporite contacting inferomarginal ossicle; loss of aboral plating; axillary oval in shape.|
|D. B. Blake 2014||Phragmactinid lacking body-wall ossicles dorsal to marginals. Marginals in single series, their form shield-like. Axillary ventral, large, shield-like. Madreporite ventral in position but dorsal to marginal-axillary series. Podial pores lacking throughout arm length. Adambulacral forming an abradial rim to the ambulacral podial basin; adambulacrals broadest distally where abutting ambulacral transverse ridge, narrowing proximally. Ventral edge of MAO pair narrow, forming a possibly spine-bearing ridge.|