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Protochordata
Protochordata[¦prōd·ō·kȯr′dad·ə] (invertebrate zoology) The equivalent name for Hemichordata. Protochordata
Protochordata a division of the phylum Chordata, including the Hemichordata, Urochorda and Cephalochorda. The group lacks a vertebral column, cranium and organs associated with the region of the head in other chordates, but has a dorsal nerve chord and gill slits. |