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Featured Fossil Archive

 

This page links to past Featured Fossils of all geological time periods.

The Last Featured Fossil....

 

Myelodactylis - a coiled crinoid with the calyx in the center

Fossil Type:

Crinoid

Name:

Myelodactylis sp. (M. ammonis Bather?)

Formation:

Waldron shale

Age:

Wenlockian, Middle Silurian

Location:

Jeffersonville, Clark Co., Indiana

Notes:

One of the more bizarre growth habits among the crinoids are those that coil. The small calyx is in the center of the coil and is exposed when it unwinds. Camptocrinus is another genus that also grew in this habit. Click here for a view before preparation. Anonymous collection. Mark Schneider photo. Prepared by Vic Wright.

Date Posted:

April 21, 2015

 

Invertebrates

      Micro-fossils          Worms          Arthropods: Non-Trilobite          Trilobites

Brachiopods                    Bryozoans                    Porifera (Sponges) 

Corals:               Rugose                    Tabulate                    Scleractinian

Echinoderms: Crinoids                    Echinoids & Asteroids             Extinct Classes

Mollusks: Bivalves               Cephalopods               Gastropods               Other Mollusks

            Graptolites

Vertebrates

Fish                           Mammals                 Reptiles

 

Plants

Algae                 Ferns & Horsetails / Primitive Plants           Angiosperms & Gymnosperms

 

Trace Fossils       Miscellaneous

Featured Fossil Home Page

 

Created April 13, 2012, updated April 22, 2015.