craniata

Differences between Acraniata and Craniata

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  S.N Acraniata Craniata 1. They are exclusively marine. They are aquatic or terrestrial. 2. They are small sized chordates. They are mostly large sized vertebrates. 3. Appendages, cephalization and exoskeleton are absent.  Appendages are two pairs usually, well developed head and exoskeleton present. 4. Coelom is enterocoelic, budding off from embryonic archenteron. Coelom is … Read more

Phylum: Chordata, its classification and characteristics

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The characteristics of this phylum are as follows: Presence of notochord Presence of dorsal hollow (tubular) nerve cord. Presence of pharyngeal gill slits. Post anal tail is present. Image source: kullabs This phylum is classified into four sub-phylum. They are as follows: Sub- phylum 1: Hemichordata Marine animals. Simple worm-like soft bodied animal. Remain buried … Read more