Receptaculites subturbinatus Fossil Algae

These images appear to show fossilized discoidal dasycladacean alga called Receptaculites subturbinatus. It was found in the Waldron Shale of Bartholomew County, Indiana USA. The fossil dates to the Middle Silurian Period (Wenlockian).

See more examples at Falls of the Ohio State Park web site.

Acanthothiris spinosa Brachiopod Fossil

These images are of the brachiopod fossil Acanthothiris spinosa (Schlotheim). It was found in the Salperton Limestone, Upper Inferior Oolite (Bajocian). The fossil was found in Nailsworth Gloucestershire, England. It dates to Middle Jurassic Period.

Desmograptus micronematodes Graptolite Fossil

This fossil was found in the Waldron Shale of Clark County, Indiana USA. It appears to be a Desmograptus micronematodes graptolite. The fossil dates to the Silurian Period (Wenlockian).