Crinoidea - Hemistreptocrinoidea
Listed in 1978 Treatise (T759) as a "new class of crinoid" so presumably a subclass
Parent taxon: Crinoidea according to Yu. A. Arendt 1976
Sister taxa: Abbreviatocrinites, Acariaeocrinus, Aethocrinea, Angulata, Asperocrinidae, Aspidocrinus, Balearocrinus, Baryschyr, Bornium, Camerata, Carpenterocrinus, Communicrinus, Crisantum, Cyclocaudex, Cyclocharacidae, Cyclocrista, Cyclocyclicus, Cyclomischidae, Cycloscapus, Dazhucrinus, Dentiferocrinidae, Dicyclica, Dronovicrinus, Dulanocrinus, Dwortsowaecrinus, Echmatocrinida, Entrochus, Entrochus rotiformis, Exaesiodiscidae, Flexicrinus, Floricyclidae, Floripila, Flucticharacidae, Flucticharax, Gasterometra, Gemmacrinus, Glyphidocrinus, Heterostelechus, Kojvicrinus, Kstutocrinidae, Lamprosterigma, Leptocarphiidae, Lichenocrinus, Malovicrinus, Mastocrinus, Mooreanteris, Moscovicrinus, Multifidocrinus, Ordinacrinus, Pandocrinus, Pentacrinoidea, Pentagonocyclicus, Pentagonopterix, Pentaridica, Picteticrinus, Pinegicrinus, Preptopremnum, Protocrinoida, Protocrinoidea, Salairocrinidae, Salairocrinus, Schyschcatocrinidae, Stenocrinidae, Stukaliniidae, Tantalocrinidae, Taranshicrinidae, Tatjanicrinus, Tetragonocyclicus, Tetralobocrinus, Torrocrinus, Waikaripites, Webericrinus, Zeravschanocrinus
Subtaxa: Hemistreptocrinida
Ecology: stationary upper-level epifaunal suspension feeder
Distribution: there are no occurrences of Hemistreptocrinoidea in the database