Name: Onychocrinus
exculptus: Flexibilia, Taxocrinda Parascytalocrinus validus: Inaudinata,
Cladida. Scytalocrindae
Age: Lower
Mississippian Osagean Stage (345 m.y.a)
Size (25.4
mm = 1 inch): Onychocrinus: Crown: 40 mm long by 46 mm wide stem: 45 mm
Parascytalocrinus: Crown: 30 mm long by 25 mm on a 120 mm by 120 mm matrix
Location:
Crawfordsville,
Indiana
|  Description:
The larger unusual crinoid is a member of the Flxibila, or flexible
crinoids known as Onychocrinus exculptus. These alien-looking crinoids
derive the group name for obvious reasons. Crinoids such as these
are easily disarticulated, but this one is quite intact, preserved
in a fine 3-D aspect. The smaller crinoid is a fine example of an
Inadunate Cladid crinoid (Family Scytalocrinidae) known as Parascytalocrinus
validus from the famous Crawfordsville crinoid beds. These specimens
are well presented on this 120 mm by 120 mm siltstone matrix.
|
|
