-ˈtōpēə noun
( -s )
Etymology: New Latin, from Cyrtopia, genus of crustaceans, from cyrt- + -opia; from the resemblance of these larvae to crustaceans of this genus
: a larva of certain crustaceans (subclass Ostracoda) characterized by a lengthening of the first pair of antennae and loss of swimming function in the second pair