plural noun
Tany·sto·ma·ta | \ˌtanə̇ˈstōmətə\

Definition of Tanystomata 

in some classifications

: a division of dipterous insects inwhich the proboscis is large and contains lancelike mandibles and maxillae — compare horsefly, robber fly

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History and Etymology for Tanystomata

New Latin, from tany- + -stomata

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