Cromyocrinidae

Partial crown of Parulocrinus blairi, from the University of Nebraska-Lincoln.

Belongs within: Cromyocrinacea.

The Cromyocrinidae are a group of crinoids with globose cups known from the Carboniferous and Permian periods (Moore et al. 1978).

Characters (from Moore et al. 1978): Cup more or less globe-shaped, including forms with upflared or subhorizontal infrabasals; mostly three anal plates in cup but exceptionally only two. Anal sac very short and small. Arms uniserial, unbranched, or branched isotomously on primibrachs 1 in all rays or biserial and often branching a second time on secundibrachs 1 in some half rays. Column transversely round.

<==Cromyocrinidae [Ethelocrinide]
    |--Cromyocrinus Trautschold 1867 ML78
    |    `--*C. simplex Trautschold 1867 ML78
    |--Dicromyocrinus Jaekel 1918 ML78
    |    `--*D. ornatus (Trautschold 1879) [=Cromyocrinus ornatus] ML78
    |--Ethelocrinus Kirk 1937 ML78
    |    `--*E. magister (Miller & Gurley 1890) [=Eupachycrinus magister] ML78
    |--Moapocrinus Lane & Webster 1966 ML78
    |    `--*M. rotundatus Lane & Webster 1966 ML78
    |--Mooreocrinus Wright & Strimple 1945 ML78
    |    `--*M. geminatus (Trautschold 1867) ML78 [=Cromyocrinus geminatus ML78, Eupachycrinus geminatus J18]
    |--Parethelocrinus Strimple 1961 ML78
    |    `--*P. ellipticus Strimple 1961 ML78
    |--Mantikosocrinus Strimple 1951 ML78
    |    |--*M. castus Strimple 1951 ML78
    |    `--M. wrighti (Yakovlev & Ivanov 1956) [=Dicromyocrinus wrighti] ML78
    |--Metacromyocrinus Strimple 1961 ML78
    |    |--*M. holdenvillensis Strimple 1961 ML78
    |    `--M. gillumi ML78
    |--Synarmocrinus Lane 1964 ML78
    |    |--*S. brachiatus Lane 1964 ML78
    |    `--S. fundunus ML78
    |--Goleocrinus Strimple & Watkins 1969 ML78
    |    |--*G. masonensis Strimple & Watkins 1969 ML78
    |    |--G. mangeri U78
    |    `--G. vadosus (Washburn 1968) [=Phanocrinus vadosus] ML78
    |--Aglaocrinus Strimple 1961 [incl. Ataxiacrinus Strimple 1961 non Lyon 1869, Tarachiocrinus Strimple 1962] ML78
    |    |--*A. magnus (Strimple 1949) [=Ethelocrinus magnus] ML78
    |    |--A. compactus ML78
    |    `--‘*Ataxiacrinus’ multiramus Strimple 1961 [=*Tarachiocrinus multiramus] ML78
    |--Paracromyocrinus Strimple 1966 ML78
    |    |--*P. vetulus (Lane 1964) [=Parulocrinus vetulus] ML78
    |    |--P. marquisi ML78
    |    `--P. texasensis ML78
    `--Parulocrinus Moore & Plummer 1940 ML78
         |--*P. blairi (Miller & Gurley 1893) [=Ulocrinus blairi] ML78
         |--P. beedei ML78
         `--P. pontiacensis ML78

*Type species of generic name indicated

REFERENCES

[J18] Jaekel, O. 1918. Phylogenie und System der Pelmatozoen. Paläontologische Zeitschrift 3: 1-128.

[ML78] Moore, R. C., N. G. Lane, H. L. Strimple, J. Sprinkle & R. O. Fay. 1978. Inadunata. In: Moore, R. C., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt T. Echinodermata 2. Crinoidea vol. 2 pp. T520–T759. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[U78] Ubaghs, G. 1978. Skeletal morphology of fossil crinoids. In: Moore, R. C.,  & C. Teichert (eds) Treatise on Invertebrate Paleontology pt T. Echinodermata 2. Crinoidea vol. 1 pp. T58–T216. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).