Trilobita - Proetida - Bathyuridae
Alternative spelling: Hadrohybus
Full reference: P. E. Raymond. 1925. Some trilobites of the lower Middle Ordovician of eastern North America. Bulletin of the Museum of Comparative Zoölogy at Harvard College 67(1):1-180
Parent taxon: Bolbocephalus according to R. A. Fortey 1988
See also Sepkoski 2002
Sister taxa: Bolbocephalus convexus, Bolbocephalus ellesmerensis, Bolbocephalus glaber, Bolbocephalus gunnari, Bolbocephalus jeffersonensis, Bolbocephalus kindlei, Bolbocephalus myktos, Bolbocephalus seelyi, Bolbocephalus stclairi, Bolbocephalus stitti
Subtaxa: Hadrohybus dunbari
Type: Hadrohybus dunbari
Ecology: fast-moving low-level epifaunal deposit feeder
Distribution: found only at Stearing Island (Ordovician of Newfoundland)