Examples of Hemichordata | Free Biology Notes

Examples of Hemichordata

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Examples of Hemichordata

Balanoglossus

• Commonly known as acorn worm or tongue worms
• Solitary and burrowing worm-like marine animal
• The body of Balanoglossus is soft, elongated, cylindrical and covered with mucus
• Length of animal varies from 2 cm to 2.5 meters
• The body is un-segmented and divided into three regions:- Proboscis, Collar and Trunk
• Alimentary canal straight; mouth and anus at opposite ends.
• Sexes separate and Development with or without tornaria larva.

Cephalodiscus

• Sedentary and colonial marine animal
• Body divided into three regions:- Proboscis, Collar and Trunk
• Tentacles aris­ing from collar
• Sexes are hermaphrodite and development is direct

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