After Ausich & Messig, 1998 [“The Tree of Life Project”] and Hess, Ausich, Brett & Simms, 1999

A List of Fossil and Living Crinoid Genera and Species (which I have been unable to associate with other Crinoid taxa, including cladids)

<==o Crinoidea (sea lilies and feather stars; merililjat)
   |?-o †Hemistreptocrinoidea
   |  `-- †Hemistreptocrinida
   |==o †Aethocrinea Ausich, 1989 [“Four-circlet crinoids”] [paraphyletic assemblage of basal crinoids]
   |  `--o †Aethocrinida Ausich, 1989
   |     |--o †Aethocrinus Ubachs, 1969
   |     |  `-- †A. moorei
   |     `-- †Colpodecrinus
   |--+--o †Hypocrinida
   |  |  |?-o †Hypocystites
   |  |  |  `-- †H. eldonensis
   |  |  `?-o †Hypocrinus
   |  |     `-- †H. conicus
   |  `-- †Disparida Moore & Laudon, 1943b
   `--o Cladida [A list of cladid genera]
      |?-o †Ampelocrinidae Kirk, 1942
      |  `--o †Paragassizocrininae Strimple & Watkins, 1969
      |     `--o †Paragassizocrinus Moore & Plummer, 1940
      |        `-- †P. tarri (Strimble, 1938)
      |?=o †Cyathocrinina
      |  |?-o †Cyathocrinites
      |  |  |-- †C. multibrachiatus
      |  |  `-- †C. iowensis
      |  `?-o †Euspirocrinus
      |     `-- †E. spiralis
      |?= †Dendrocrinina
      |?=o †Poteriocrinina
      |  `?-o †Cromyocrinus
      |     `-- †C. simplex
      |-- †Camerata
      |-- †Flexibilia
      `-- Articulata [non Articulata, a group of Branchiopoda (ICZN rules, article 1 b4)] (modern sealilies; nykymerililjat)

Note:

Echinoderm class Crinoidea contains over 6000 fossil species in over 800 genera and approximately 600 living species, of which 540 nominal species in 142 genera are comatulids (feather stars). There is still circa 60 species of stalked sea lilies, the last hang-overs from the Palaeozoicum. (Hess, Ausich, Brett & Simms, 1999, Messing, ????)

Reference(s):