why belonoglossus is hemochordata?
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Meghna Thapar 5 years, 4 months ago
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. 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. ... Hyman (1959), however, placed them near Echinodermata and gave Hemichordata a status of an independent phylum.
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