Article: The Devonian blastoid Belocrinus from France

The nature and validity of the Lower Devonian blastoid genus Belocrinus Munier-Chalmas from north-western France has been in doubt since its original description. A complete specimen of the type species, B. cottaldi (Munier-Chalmas) is described and illustrated. The genus Belocrinus is redefined; it is similar to, but not synonymous with, the genus Cordyloblastus Fay. The number of anal deltoids and hydrospires in Belocrinus could not be determined. The ontogenetic development of the plates of the calyx is also described.