The only known fossil specimen is about 5 centimeters in length.

Their diet is not clear, as none of the fossil specimens found have preserved mouth parts.

You will observe from the cartilage that this is no fossil specimen, but recent.

There are two species recognized, each known from a single, poorly preserved fossil specimen.

A field collection of perhaps 10,000 fossil specimens has been amassed.

So far, the museum's fossil specimens have been crucial in exploring that theory.

The center also houses a major collection of fossil specimens for use by researchers.

That will help it to flow into and onto your fossil specimen.

Several fossil specimens of different ages and sizes are known.

A 2006 paper indicates that the only fossil specimen has been lost.