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Phylum Coelenterata

Which group o...

Question

Which group of chordates possess a sucking and circular mouth without jaws?

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Solution

Subphylum vertebrata has two divisions:

Agnatha: Without jaws

Gnathostomata: With jaws

The class Cyclostomata includes the "jawless vertebrates". All the members of Cyclostomata have a sucking and circular mouth making them ectoparasites. Cyclostomata includes hagfishes (e.g.- Myxine) and lampreys (e.g.- Petromyzon).

Final answer: Cyclostomata.

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Which group of chordates possess sucking and circular mouth without jaws?

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Phylum Coelenterata

Standard VII Biology

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