User:Abyssal/Portal:Ordovician/DYK/2

... that the extinct trilobite Bumastus (artist's rendition pictured) was named after its resemblance to large grapes?
... that the fossil bivalve Emiliodonta shared its name with a coccolithophore for about a decade?
... that the Ordovician age bivalve Villicumia has overlapping teeth seen in few other bivalves?
... that fossils of the extinct bivalve family Praenuculidae have been found on every continent except Antarctica?
...that ostracoderms are the earliest known vertebrate animals?