The Calymene trilobite that I documented over the weekend has more of its left cheek exposed.  I have suspended work on it as the needle...

Over 400 million years ago, the muddy seafloor stirred below a deep tropical sea.  Slowly, the armored headplate of a multi-segmented crea...

It appears this is a complete Calymene trilobite of the Middle Silurian Period.  It is about 5 cm long and will be a challenge to coax o...