†subfamily Armathyrasterinae Harper and Morris 1978 (brittle star)
Full reference: J. A. Harper and R. W. Morris. 1978. An new encrinasterid ophiuroid from the Conemaugh Group (Pennsylvanian) of Western Pennsylvania, and revision of the Encrinasteridae. Journal of Paleontology 52(1):155-163
Parent taxon: Encrinasteridae according to J. A. Harper and R. W. Morris 1978
Sister taxa: Cheiropteraster, Encrinaster, Encrinasterinae, Euzonosoma, Loriolaster, Mastigactis, Urozoma
Subtaxa: Armathyraster Mausoleaster
Type: Armathyraster
Ecology: slow-moving low-level epifaunal detritivore-suspension feeder
Distribution:
• Carboniferous of United States (1: Pennsylvania collection)
• Silurian of Australia (2)
Total: 3 collections each including a single occurrence