Platyceras dumosum Snail Fossil (ex-museum specimen)

 

This fossil is a Platyceras dumosum (Conrad, 1840) spiny snail (gastropod). It was found at the Falls of the Ohio in Clark County, Indiana USA. Fossils cannot be collected at the Falls any more but this one came from a de-accessioned museum collection in Michigan. The layer it was found is called the Jeffersonville Limestone which dates to the Middle Devonian Period.

 Judging from by the color this fossil might have been collected over 100 years ago.

The genus Platyceras was named by Timothy Abbott Conrad (1803-1877) in Third Annual Report on the Palaeontological Department of the Survey. New York Geological Survey, Annual Report 4(1):199-207 1840.

Thanks to Dale for letting me take these pictures.

 

Probelesodon minor Fossil

 

This fossil reptile skull and jaw were displayed on August 2022, at the Harvard Museum of Natural History in Cambridge, Massachusetts, USA. It is called Probelesodon minor (Romer, 1973). The creature lived during the middle Triassic Period. Fossil was found in 1965 in the Chañares Formation of La Rioja Province of Argentina.

Placenticeras Ammolite Fossil

 

 

This fossil was displayed on August 2022, at the Harvard Museum of Natural History in Cambridge,Massachusetts, USA. It is an ammonite fossil is called Placenticeras (Meek, 1870). The creature lived during the Upper Cretaceous Period (80 million years ago). Fossil was found in Bearpaw Formation on the Blackfeet Reservation of southern Alberta, Canada. Specimen on loan to museum from the Mineral Trust.

The amazing iridescent colors are the mineral ammolite (aragonite).