Wednesday, October 22, 2014

Resserella canalis brachiopod from the Wenlock Fm.

This is the brachiopod Resserella canalis from the Silurian Wenlock formation (Wenlock series, Sheinwoodian to Homerian stage), near Dudley, England. The Pedicle valve is very convex and has a curved beak. The brachial valve is flat to slightly convex. Radial ribs are fine and only minor growth lines are visible. This is a widespread genera during the Silurian and I've found the similar looking species Parmorthis waldronensis in the Waldron Shale and, Resserella elegantula, from the Irondequoit Limestone (both of which are similar in age to the Wenlock formation).

Brachial valve
Anterior
Pedicle valve
Posterior
Profile


Monday, October 20, 2014

Sphaerirhyncia wilsoni brachiopod from the Wenlock formation

I'm kicking off a series of posts featuring brachiopods from the classic Wenlock formation of England with Sphaerirhyncia wilsoni.This brachiopod has a rounded shell with a shallow but wide sulcus. Ribbing is even but coarse and there are fine growth lines preserved as well. Note the bryozoan epibiont in the first image.


Brachial valve
Anterior
Pedicle valve
Posterior
Profile

This specimen came from the Silurian aged (Wenlock series, Sheinwoodian to Homerian stage) Wenlock formation near Dudley, England.

I've posted a similar specimen, Sphaerirhynchia lindenensis, from the lower Devonian (Lochkovian stage) Haragan formation of Oklahoma, here.

Saturday, October 18, 2014

Rhyncholampas gouldii echinoid from Florida

Here we have a Rhyncholampas gouldii echinoid from FL. It was found in the Oligocene aged Suwannee Limestone southeast of Tallahassee. It is very similar in appearance to the genus Hardouinia (Cretaceous) but is found much later in the geologic column.

Adapical surface (top)
Anterior
Right profile
Posterior
Left profile
Adoral surface (underside or bottom)

The label that was originally included with this specimen listed it as Rhynchopygus but that genus is only valid in the late Cretaceous of Europe.

Thursday, October 16, 2014

Scaphite hungadrianus ammonite from Hungary

This is the last of the ammonites that I received from my Hungarian friend. Scaphite hungadrianus is a heteromorph type ammonite. This means it's shell does not form a neat spiral that is contained in a single plane. The ammonite started out with a normally coiled shell but then at some point it abandoned the coil and grew straight for a bit before returning to a coil. This is best illustrated in the third picture below. The specimen comes from near Pénzesgyőr, Hungary and was found in sediments from the Aptian stage of the Cretaceous.







I found a cool series of videos on You Tube that were created by a local fossil hunter in Hungary. One of them focuses on collecting at Pénzesgyőr.
Thank you Karoly for the cool specimen!

Tuesday, October 14, 2014

Salaziceras salazacense ammonite from Hungary


This is the ammonite Salaziceras salazacense ammonite from Pénzesgyőr, Hungary. It was collected from Cretaceous (Aptian stage) aged rocks. It is nicely detailed with some of the sutures visible on the back. It was among the fossils I received from my friend Karoly in Hungary.