Catalog Number: CG-0018

Amphiscapha is a common fossil in Parks Township. It appears often as a flat spiral within shale. This particular specimen was accompanied by two Meekospira. I used a pair of engineering tweezers to remove some matrix from the sides of the larger of the two Meekospira.

First described in 1942 by J.B. Knight, Amphiscapha was described as:

Discoidal shells with the spire depressed and the umbilicus very wide and shallow.

J.B. Knight, Journal of Paleontology, Vol 16, No. 4, PP. 487-488, July 1942

It has a generally short geologic age range of 318 to 272 million years ago. The genus was extant for only 46 million years which is shorter than most invertebrate species I have studied so far. Meekospira as a genus dies out during the P-T Extinction event, where around 96% of all marine species perished. Amphiscapha died out 20 million years prior.

More about Amphiscapha online