Other corals from Iowa

Here are some corals that my friend Nathan gave me from the Cedar Valley formation of Iowa (Devonian, Givetian stage).

A couple of Favosites: Specimen #1

Specimen #2

Side by side

A rugose coral of unknown species

Some more rugose corals

And then there is this brachiopod specimen with small coral growth remnants attached to the shell. I don't know what species they were but I do love shells with epibonts.

Thanks to Nathan for the specimens.

Strophodonta? from Iowa

Here are a couple of specimens from the Cedar Valley formation (Devonian, Givetian stage) of Iowa that I think are Strophodonta. I'm not entirely sure of the species or if I even have the genera correct.

Specimen #1

Specimen #2

There are a few different genera of Strophomenid type brachiopods that are found in the Devonian rocks of Iowa and some of them can be seen at my friend Nathan's Imgur page.

Strobilocystites polleyi Cystoid from Palo, Iowa

Strobilocystites polleyi is the first cystoid that I have from the Devonian. I won it from an auction on E-bay and it fits in well with my collection of fossils from the Cedar Valley Formation of Iowa.

It is composed of many large plates with a single Aulacophore present about 3/4 up the side of the body. Cystoids are odd echinoderms that I don't understand very well so I may have the terminology of the anatomy incorrect.

Side views

This specimen came with a label that states it came from the Cedar Valley Formation (Devonian, Givetian) near Palo, Iowa. I found an old excerpt called "Echinoderms of the Iowa Devonian" by A. O. Thomas that discuss' this species and others found in Iowa. I'm not sure what publication it was part of originally.