Ascidioidea

• (n. pl.) A group of Tunicata, often shaped like a two-necked bottle. The group includes, social, and compound species. The gill is a netlike structure within the oral aperture. The integument is usually leathery in texture. See Illustration in Appendix.
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Ascidioidea

As·cid`i·oid'e·a noun plural [ New Latin , from ascidium + -oid . See Ascidium .] (Zoology) A group of Tunicata, often shaped like a two-necked bottle. The group includes, social, and compound species. The gill is a netlike structure within the oral aperture. The in...
Found on http://www.encyclo.co.uk/webster/A/128
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