File:Taxocrinus sp. (fossil crinoid) (Meadville Shale, Lower Mississippian; Lodi, Ohio, USA) 1 (35806677935).jpg

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Taxocrinus sp. - fossil crinoid from the Mississippian of Ohio, USA. (CMNH 5685, Cleveland Museum of Natural History, Cleveland, Ohio, USA)

Crinoids (sea lilies) are sessile, benthic, filter-feeding, stalked echinoderms that are relatively common in the marine fossil record. Crinoids are also a living group, but are relatively uncommon in modern oceans. A crinoid is essentially a starfish-on-a-stick. The stick, or stem, is composed of numerous stacked columnals, like small poker chips. Stems and individual columnals are the most commonly encountered crinoid fossils in the field. Intact, fossilized crinoid heads (crowns, calices, cups) are unusual. Why? Upon death, the crinoid body starts disintegrating very rapidly. The soft tissues holding the skeletal pieces together decay and the skeleton falls apart.

Classification: Animalia, Echinodermata, Crinoidea, Flexibilia, Taxocrinida, Taxocrinidae

Stratigraphy: Meadville Shale Member, lower Cuyahoga Formation, Kinderhookian Stage, lower Lower Mississippian

Locality: unrecorded/undisclosed site at or near Lodi, southwestern Medina County, northeastern Ohio, USA

See info. at:

<a href="https://en.wikipedia.org/wiki/Crinoid" rel="nofollow">en.wikipedia.org/wiki/Crinoid</a>
Date
Source Taxocrinus sp. (fossil crinoid) (Meadville Shale, Lower Mississippian; Lodi, Ohio, USA) 1
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/35806677935 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

7 December 2019

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current18:06, 7 December 2019Thumbnail for version as of 18:06, 7 December 20191,264 × 3,487 (3.45 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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