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Balanoglossus

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Balanoglossus capensis (Cape Acorn Worm) live and moving

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Balanoglossus: The acorn worm

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NEET BIO - Explained Diagram Of Balanoglossus, Animal kingdom, phylum- Hemichordata

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Animal Kingdom | Part 18 | Phylum : Hemichordata

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Acorn worms — our closest invertebrate relative — can regrow whole body parts

Balanoglossus is an ocean-dwelling acorn worm (Enteropneusta) genus of great zoological interest because, being a Hemichordate, it is an "evolutionary link" between invertebrates and vertebrates. Balanoglossus is a deuterostome, and resembles the Ascidians or sea squirts, in that it possesses branchial openings, or "gill slits".It has notochord in the upper part of the body and has no nerve chord. It does have a stomochord, however, which is gut chord within the collar. Their heads may be as small as 2.5 mm (1/10 in) or as large as 5 mm (1/5 in).
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