A class of minute transparent planktonic animals related to the sea squirts. They have a tadpole-like body which is typically enclosed in a gelatinous ‘house’ that is regularly shed and replaced.
- Within the urochordates, both genes placed Oikopleura (class Larvacea) as the sister group to all other urochordates.
larvacean adjective& noun
- Example sentences
- Ascidians and thaliaceans (which, along with the larvaceans, comprise the subphylum Urochordata) display a biphasic life-history with morphologically dissimilar larval and adult body plans.
- This supposition is largely based on data which suggests that, within the urochordates, the directly developing larvaceans are most primitive and the other two chordate subphyla are exclusively directly developing.
- Other more sophisticated jelly creatures include some mollusks and snails, and tunicates - sea squirts, salps and larvaceans.
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