Crinoid Dizygocrinus Hisforcrinus Plaque

Description

Crinoid Dizygocrinus Hisforcrinus Plaque Measures 7.0×5.5 inches. The Crinoid Dizygocrinus Hisforcrinus Plaque is museum quality polyurethane cast. Made in USA.

Lower Mississippian Muldraugh Group. Montgomery County, Indiana. Dizygocrinus, also known as the feather star, is a genus of extinct sea lily from the Batocrinidae family. These stationary upper-level epifaunal suspension feeders lived in the Carboniferous period of United States, from 345.0 to 342.8 Ma.

Crinoids, sometimes commonly referred to as sea lilies, are animals, not plants. They are echinoderms related to starfish, sea urchins, and brittle stars. Many crinoid traits are like other members of their phylum; such traits include tube feet, radial symmetry, a water vascular system, and appendages in multiples of five.

Dizygocrinus is recognized from both the late Osagean and Meramecian on both the eastern and western margins of the Illinois Basin. Dizygocrinus is first recognized virtually simultaneously on both the eastern and western margins of the Illinois Basin.

Migration proceeded in both directions, but was most common later in the history of the genus. The principal radiation on the western basin margin was among species with generally smooth aboral cup plates, whereas on the eastern margin sculptured species account for the principal species radiation.

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