6i Pogonophora — Echinodermata 



Class Subcl Order 



Comatulida jur-rec 



EOCRINOIDEA '^ cam-ord 



Eocrinoidea cam-ord 



PARACRINOIDEA ord 



Paracrinoidea ord 



EDRIOASTEROIDEA (Thecoidea, Cystasteroidea, Thyroidea, cam-pen 

 A gelacrinoidea ) 



Edrioasteroidea cam-pen 



CARPOIDEA CAM-DEV 



Carpoidea cam-dev 



MACHAERIDIA ^'^ ord-dev 



Machaeridia ord-dev 



HAPLOZOA ^^ CAM 



Cyamoidea cam 



Cycloidea cam 



SOMASTEROIDEA ord 



Goniactinida ord 



ASTEROIDEA '"' (Cirrigrada) ord-rec 



Hemizonida ord-car 



Platyasterida ord-dev 



Phanerozonea ord-rec 



Spinulosa ^^® rec 



Forcipulata ^^° rec 



AULUROIDEA ord-mis 



Lysophiuroida (Lysophiurae, Aegophiurida) ord-mis 



Streptophiuroida (Streptophiurae) ord-mis 



OPHIUROIDEA ^'' (Spinigrada) ord-rec 



Myophiurida ord-dev 



Ophiocystiida ord-dev 



Aganasterida ?-rec 



Phrynophiurida ?-rec 



Laemophiurida ?-rec 



Gnathophiurida ?-rec 



nocyclica, Dicyclica, Irregularia, Regularia, Larvata, Tesselata, Canaliculata, 



Semi-articulata. 



^^^ Sometimes divided into Larviformia (Haplocrinacea) and Fistulata (Cyatho- 



crinacea). 



^^^ Includes: Pentacrinoidea, Pentacrinacea, Stomatocrinoidea, Neocrinoidea. 



123 Perhaps not a natural group. 



^2* Groups of doubtful relationships, — possibly not even Echinodermata. 



12° Includes: Encrinasteriae, Euasteriae, Cryptozonia. 



126 Sometimes united as Cryptozonia. 



1" Includes: Ophiureae, Ophiurida, Euryalae, Euryalida, Cladophiurae, Zyg- 



ophiurae. Also sometimes divided into orders Stenurida and Ophiurida. 



