Crinoid

Object/Artifact

-

Crater Rock Museum

Name/Title

Crinoid

Entry/Object ID

2011.57.67

Description

Description: Phylum: Echinodermata Class: Crinoidea Common Name: Sea Lily Age: Silurian Location: Morocco, Africa Description: Large thick slab with a single crinoid fossil. Finely detailed, covering entire specimen. Matrix is reddish-brown and tan with some very small fossils (unknown) and small partial crinoid fossil. Fossil is dark brown to black. Physical Characteristics: Echinoderms (Phylum Echinodermata) are a phylum of marine animals. Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. Aside from the problematic Arkarua, the first definitive members of the phylum appeared near the start of the Cambrian period.The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates. Echinoderms are also the largest phylum that has no freshwater or terrestrial representatives.The word is derived from the Greek ?????d??µata (echinodermata), plural of ?????de?µa (echinoderma), "spiny skin" from ?????? (echinos), "sea-urchin", originally "hedgehog,"[1] and d??µa (derma), "skin".[2][3]The echinoderms are important both biologically and geologically: biologically because few other groupings are so abundant in the biotic desert of the deep sea, as well as the shallower oceans, and geologically as their ossified skeletons are major contributors to many limestone formations, and can provide valuable clues as to the geological environment. Further, it is held by some[citation needed] that the radiation of echinoderms was responsible for the Mesozoic revolution of marine life. Kingdom: Animalia (Animals) Class: Crinoidea Phylum: Echinodermata

Collection

Museum Collection of Fossils

Acquisition

Accession

2011.57

Source or Donor

Museum Collection of Fossils

Acquisition Method

Long-term Loan

Dimensions

Width

12 in

Depth

1-1/4 in

Length

20-3/4 in

Location

Location

Container

Center

Drawer

Back Row / Bottom

Shelf

Right

Cabinet

Case # 51

Wall

North

Room

Delmar Smith Hall

Building

Crater Rock Museum

Category

Permanent