Petalocrinus is a genus of primarily cladid cyathocrininid sea lily of the superfamily Gasterocomacea that lived during the Silurian period.

Fossils of the numerous species have been found in Silurian strata in North America, England, Sweden, and China, where they underwent a speciation event during the early Late Silurian that gave rise to Sinopetalocrinus and Spirocrinus

As with all other members of Petalocrinidae, the five arms of Petalocrinus were fused into flower petal-shaped (or guitar pick- or button-shaped) wedges, with a distinctive pattern of grooves. It is assumed that the grooves played a role in conveying food, i.e., plankton captured by the tubefeet, to the mouth. The function of the arms, on the other hand, is a source of much speculation.

Mantell's Iguanodon restoration

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.