The middle limb segment of the pelvic free limb, between the autopod and stylopod segments. Includes as parts the hindlimb zeugopodial skeleton, which includes as parts the tibia and fibula, or their cartilage precursors, or evolutionary variants.
Synonyms:
exact_synonym:
calf of leg; crus; crus of hindlimb; hind limb middle limb segment; hind limb zeudopodium; hind limb zeugopod; hindlimb epipodium; hindlimb middle limb segment; hindlimb zeudopodium; hindlimb zeugopodium; intermediate segment of free lower limb; lower extremity middle limb segment; lower extremity zeugopod; lower leg; middle limb segment of hind limb; middle limb segment of hindlimb; posterior curral region; posterior leg region; posterior part of leg; posterior region of leg; regio cruris posterior; regio surae; shank; sura; sural region; zeugopod of hind limb; zeugopod of hindlimb