Pelecocrinidae

Pelecocrinus insignis, from Moore et al. (1978).

Belongs within: Dendrocrinida.

The Pelecocrinidae are a group of crinoids with tall, ovoid crowns known from the Carboniferous and Permian periods (Moore et al. 1978).

See also: The Pelecocrinidae.

Characters (from Moore et al. 1978): Crown tall, ovoid. Cup low, bowl-shaped, with shallow basal concavity; infrabasals five, rarely four, barely visible or not visible in side view; radial articular facets peneplenary, narrower than radials, inclined slightly to strongly outward-downward, with prominent transverse ridge, interradial notches distinct; three anal plates in cup. Arms isotomous where known, pinnulate, with wedge-shaped brachials.

Pelecocrinidae
    |--Pelecocrinus Kirk 1941 ML78
    |    `--*P. insignis Kirk 1941 ML78
    |--Depaocrinus Wanner 1937 ML78
    |    `--*D. ottowi Wanner 1937 ML78
    |--Exoriocrinus Strimple & Moore 1971 ML78
    |    `--*E. lasallensis (Worthen in Worthen & Meek 1875) [=Poteriocrinus lasallensis] ML78
    |--Forthocrinus Wright 1942 ML78
    |    `--*F. lepidus Wright 1942 ML78
    |--Malaiocrinus Wanner 1924 ML78
    |    `--*M. sundaicus (Wanner 1916) [=Zeacrinus sundaicus] ML78
    `--Tetrabrachiocrinus Yakovlev 1934 [=Heterobrachiocrinus Yakovlev 1938] ML78
         `--*T. fabianii Yakovlev 1934 [=*Heterobrachiocrinus fabianii] ML78

*Type species of generic name indicated

REFERENCES

[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).