Full reference: W. K. Spencer. 1930. A monograph of the British Palaeozoic Asteroidea. Monograph of the Palaeontographical Society, London 1828(8):389-436
Parent taxon: Ophiuroidea according to D. B. Blake and D. R. Elliott 2003
See also Jell 1997, Owen 1965, Sepkoski 2002, Spencer 1930 and Spencer and Wright 1966
Sister taxa: Ataxaster, Calclyra, Calclyridae, Cheiropterasteridae, Encrinasteridae, Euryalida, Euzonosomatidae, Hallasteridae, Lumectaster, Muldaster, Myophiuridadup, Nodolanx, Oegophiurida, Oegophiuridea, Oegophiuroida, Ophiaulaxoides, Ophioma, Ophiopetagno, Ophiotrigonum, Ophiurella, Ophiurida, Ophiuridea, Phrynophiurida, Stenasteridae, Zygophiurae
Subtaxa: Calyptactis confragosus Calyptactis perarmatus Calyptactis spinosus
Type: Calyptactis spinosus
Ecology: slow-moving low-level epifaunal detritivore-suspension feeder
Distribution: found only at Inexact locality near Crawfordsville, unknown formation, Montgomery Co., Indiana (Carboniferous of Indiana)
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.