pelycosaur

1. Large primitive reptile having a tall spinal sail;
   Of the Permian or late Paleozoic in Europe and North America (synset 101724539)
   is a type of: synapsid, synapsid reptile - extinct reptile having a single pair of lateral temporal openings in the skull
   belongs to: order pelycosauria, pelycosauria - edaphosaurus; dimetrodon

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