retrogressive metamorphosis in hertmania
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This type of metamorphosis, where highly advanced larval form ends in a lowly organised adult is called retrogressive metamorphosis. ... Fixation of the larva: The larva swims for some time without feeding. It is fixed to a sub-stratum with the help of the adhesive papillae.
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Retrogressive metamorphosis is a type of metamorphosis seen in Herdmania (and other urochordates). It involves transformation of an active, free swimming larva with advanced characters into sedentary and simple adult. So in retrogressive metamorphosis, retrogression or degeneration is shown by larva to form adult.
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