†Nassoviocrinus costatus Goldring 1954 (feather star)
Alternative combination: Botryocrinus costatus
Belongs to Nassoviocrinus according to G. E. O. McIntosh 2001
Sister taxa: Nassoviocrinus chilmanae, Nassoviocrinus corcorani, Nassoviocrinus duluki, Nassoviocrinus longibrachiatus, Nassoviocrinus ornatus, Nassoviocrinus pachydactylus, Nassoviocrinus rarifissus, Nassoviocrinus schultzei
Ecology: stationary intermediate-level epifaunal suspension feeder