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Noun

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mixopterid (plural mixopterids)

  1. (zoology) Any extinct sea scorpion in the family Mixopteridae.
    • 2015 September 1, James C. Lamsdell et al., “The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of Iowa”, in BMC Evolutionary Biology[1], volume 15, →DOI:
      Sampling of the Carcinosomatoidea is increased, with ten species included for the carcinosomatid, megalograptid, and mixopterid clades in addition to the three sampled previously.