Holectypina
plural noun
Ho·lec·ty·pi·na
hōˌlektəˈpīnə
: a suborder of extinct sea urchins (order Exocycloida) having a central peristome, an excentric periproct, an Aristotle's lantern, and nonpetaloid ambulacra and found in Jurassic, Cretaceous, and Eocene strata
Word History
Etymology
New Latin, from Holectypus, genus of sea urchins (from hol- + Greek ektypos worked in relief) + -ina