rudistes
Ru*dis"tes, n. pl. Etym: [NL., fr. L. rudis rough.] (Paleon.) Defn: An extinct order or suborder of bivalve mollusks characteristic of the Cretaceous period; -- called also Rudista. See Illust. under Hippurite.
Ru*dis"tes, n. pl. Etym: [NL., fr. L. rudis rough.] (Paleon.) Defn: An extinct order or suborder of bivalve mollusks characteristic of the Cretaceous period; -- called also Rudista. See Illust. under Hippurite.