Patelliocrinidae

Macrostylocrinus pristinus, from the Smithsonian National Museum of Natural History.

Belongs within: Glyptocrinina.

The Patelliocrinidae are a group of crinoids with large radial plates known from the Upper Ordovician to the Middle Devonian (Ubaghs 1978b).

Characters (from Ubaghs 1978b): Calyx conical or subglobose to subcylindrical; basals usually three, unequal, azygous one in AE or ED interrays, occasionally all basals fused together; CD interray usually little or not at all differentiated in calyx; tegmen rarely preserved, probably incompetent, consisting of numerous plates differentiated into ambulacrals and interambulacrals when known. Free arms uniserial, biserial, or made of compound brachials. Column typically cylindrical.

Patelliocrinidae
    |–Bolicrinus Witzke & Strimple 1981 EB01
    |–Boliviacrinus McIntosh 1988 EB01
    |–Krinocrinus Witzke & Strimple 1981 EB01
    |–Kylixocrinus Eckert 1984 EB01
    |–Thomasocrinus Witzke & Strimple 1981 EB01
    |–Patinocrinus Jaekel 1918 J18, U78b
    |–Patelliocrinus Angelin 1878 EB01
    |    `–P. pachydactylus Angelin 1878 U78b
    |–Centriocrinus Bather 1899 EB01 [=Centrocrinus Wachsmuth & Springer 1881 non Austin & Austin 1843 U78b]
    |    `–*C. pentaspinus (Lyon 1869) [=Actinocrinus pentaspinus, *Centrocrinus pentaspinus] U78b
    |–Laurelocrinus Springer 1926 EB01
    |    `–*L. paulensis Springer 1926 U78b
    |–Eopatelliocrinus Brower 1973 EB01
    |    |–*E. scyphogracilis Brower 1973 U78b
    |    `–E. latibrachiatus BLWR78
    |–Allocrinus Wachsmuth & Springer in Miller 1889 EB01
    |    |–*A. typus Wachsmuth & Springer in Miller 1889 U78b
    |    `–A. longidactylus U78b
    |–Briarocrinus Angelin 1878 EB01 [incl. Angelinocrinus Jaekel 1918 U78b; Briarocrinidae]
    |    |–*B. inflatus Angelin 1878 U78b
    |    `–B. angustus Angelin 1878 [=*Angelinocrinus angustus] U78b
    `–Macrostylocrinus Hall 1852 EB01 [incl. Loveniocrinus Jaekel 1918 U78b]
         |–*M. ornatus Hall 1852 EB01
         |–M. anglicus Jaekel 1918 J18
         |–*Loveniocrinus’ gotlandicus Jaekel 1918 U78b
         |–M. granulosus U78b
         |–M. pristinus BLWR78
         `–M. recumbens U78a

*Type species of generic name indicated

REFERENCES

[BLWR78] Brower, J. C., N. G. Lane & H. Wienberg Rasmussen. 1978. Postlarval ontogeny of fossil crinoids. In: Moore, R. C., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt T. Echinodermata 2. Crinoidea vol. 1 pp. T244–T274. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[EB01] Eckert, J. D., & C. E. Brett. 2001. Early Silurian (Llandovery) crinoids from the Lower Clinton Group, western New York State. Bulletins of American Paleontology 360: 1–88.

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

[U78a] Ubaghs, G. 1978a. 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).

[U78b] Ubaghs, G. 1978b. Camerata. In: Moore, R. C., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt T. Echinodermata 2. Crinoidea vol. 2 pp. T408–T519. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

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