Sentence:  I suggest that several species of nauplioids hybridized with representatives of several groups of arthropods to give them <WSD>nauplius</WSD> larvae. ... The occurrence of <WSD>nauplius</WSD> larvae in crustacean taxa appears to be almost random, and it bears little relationship to adult morphology or to evolutionary history. This is consistent with the proposal that <WSD>nauplii</WSD> were acquired independently and at various times, and it challenge the widely held view that <WSD>nauplii</WSD> played a fundamental role in crustacean evolution. 
Meaning of the word marked with <WSD> tags:  A crustacean larva that has three pairs of locomotive organs (corresponding to antennules, antennae, and mandibles), a median eye, and little or no segmentation of the body. (from mid 19th c.)