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Syncarida
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Syncarida

crustacean superorder

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taxonomy

  • American lobster
    In crustacean: Annotated classification

    Superorder SyncaridaCarboniferous to present; no carapace.†Order PalaeocaridaceaCarboniferous to Permian; first thoracic segment not fused to head; abdominal pleopods 2-branched, flaplike; 4 families.Order AnaspidaceaPermian to present; with or without eyes; antennules

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  • hermit crab
    In malacostracan: Annotated classification

    Superorder Syncarida Late Devonian to Holocene; carapace lacking; thorax and abdomen weakly separated; thoracic legs biramous, bearing gills but without pincer claws; abdomen 6-segmented; 150 species. †Order Palaeocaridacea Carboniferous to Permian; first thoracic segment not fused to head; abdominal pleopods 2-branched, flaplike; 4 families.

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