Bothriocidaris
noun
Both·rio·cid·a·ris
-ˈsidərə̇s
: a genus (coextensive with the family Bothriocidaridae and order Bothriocidaroida) of extinct primitive simple sea urchins that somewhat resemble Cystoidea and are known from the Ordovician of the Russo-Baltic area
Word History
Etymology
New Latin, from bothri- + Cidaris