Odd shape Lampshell

By August 27, 2017News

Bill,

These Silurian brachiopods with additional note in the matchbox below that holds them Is all the associated information there is. What I have noticed is those indicated with the “white arrow” would appear to have the same appearance as each other.

What I have noticed is those indicated with the “white arrow” below would appear to have the same appearance as each other.

But the one indicated by the “red arrow” above looks more bulbous and not flat on the bottom.

They are all probably Atrypa, possibly Atrypa reticularis. However there are other Atrypids and internal details may be required for confident identification.

Does anyone think that there may be two different species here?

WHITE arrowed brachiopod below:

RED arrowed brachiopod below:

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