Order Cyclostomata Busk 1852 

 Suborder Anasca Levinsen 1909 

 Suborder Ascophora Levinsen 1909 

 Class Phylactolaemata Allman 1856 

 Phylum Brachiopoda Cuvier 1802 

 Class Inarticulata Huxley 1869 (Gastrocaulia Thompson 1927) 

 Order Atremata Beecher 1891 

 Order Neotremata Beecher 1891 

 Class Articulata Huxley 1869 



Order *Paleotremata Thompson 1927 

 Order Protremata Beecher 1891 

 Order Telotremata Beecher 1891 

 Phylum Phoronidea E. Shultz 1903 (Pygocaulia Thompson 1927) 

 Phylum Pogonophora Johansson 1937 

 Phylum Pterobranchia Lankester 1877 

 Phylum Enteropneusta Gegenbaur 1870 



Class Balanoglossida Delle Chiaje 1820 

 Phylum Linguatula Frolich 1789 

 Phylum Echinodermata Laske 1778 

 Subphylum Pelmatozoa Leuckart 1848 

 Class *Cystoidea von Buch 1844 

 Order *Amphoridea Haeckel 1896 

 Order *Rhombifera Zittel 1879 

 Order *Diploporita Zittel 1879 

 Order *Aporita Zittel 1879 

 Order *Edrioasteroida Billings 1858 

 Class *Blastoidea Say 1925 



Order *Protoblastoida Bather 1899 

 Order *Eublastoida Bather 1899 

 Class Crinoidea Miller 1921 



Order *Camerata Wachsmuth & Springer 1885 

 Order *Adunata Bather 1899 

 Order Flexibilia Zittel 1879 



Suborder *Sagenocrinida Springer 1926 

 Suborder *Taxocrinida Springer 1926 

 Order *Inadunata Wachsmuth & Springer 1885 



Suborder *Larviformia Wachsmuth & Springer 1885 

 Suborder *Fistulata Wachsmuth & Springer 1885 

 Order Articulata Aliller 1821 



Suborder Bourgueticrinida H. L. Clark 1939 

 Suborder Pentacrinida Claus 1868 

 Suborder Holopida Haeckel 1896 

 Order Comatulida (Parks 1891) A. H. Clark 1908 

 Suborder Oligophreata A. H. Clark 1908 

 Suborder Macrophreata A. H. Clark 1908 

 Subphylum Asterozoa Leuckart 1848 

 Class Asteroidea Burmeister 1837 

 Order Phanerozonea Sladen 1889 

 Order Spinulosa Perrier 1894 

 Order Forcipulata Perrier 1894 

 Suborder Brisingina Fisher 1928 

 Suborder Asteriadina Fisher 1928 



[10] 



