Pterotrabs n. gen., a new genus of Hagiastridae (Spumellarian Radiolaria), and 3 new species (P. marculus n. sp., P. arcuballista n. sp. and P. victoria n. sp.) are described on the basis of distal remains of rays occurring in late Bathonian-early Callovian to Oxfordian deposits from the Blake-Bahama Basin, Carpathians and Dinarides. The genus is characterized by having rays of tritrabin type terminated into a special structure consisting of two strong diverging or opposite spines at the base of which two broad wing-like blades develop in a plane perpendicular to the plane of the spines.