Borrowed from New Latin Nauplius (coined by Danish naturalist Otto Friedrich Müller (1730–1784) who mistakenly thought the larvae were a separate genus of animal), from Latin nauplius ("argonaut, paper nautilus (genus Argonauta)"), from Ancient Greek ναύπλιος ("type of shellfish"), from ναῦς + πλέω; compare Latin Nauplius ("mythological king of Euboea"), from Ancient Greek Ναύπλιος ("mythological founder of the city of Nauplia (Nafplio), a son of Poseidon and Amymone").
The plural nauplii is from Latin nauplius + -iī.
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