Encyclopedia > Urochordata

Article Content

Urochordata

Urochordata (Tunicate worms, "Sea Squirts") are sacklike filter feeders[?] with input and output siphons[?].

Some larval forms appear very much like primitive chordates or hemichordates with a notochord[?] (primitive spinal cord). Some forms have a calcereous spicule that may be preserved as a fossil. Jurassic to Present with one proposed Neoproterozoic form - Yarnemia. Some workers class the Urochordates as a subphylum of the chordata.

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Grateful Dead

... '72) and 3 nights at the Great Pyramid of Giza in Egypt in 1978 - their final concert before the death of Jerry Garcia. Their numerous studio albums were generally ...