
Aplousobranchia is a suborder of sea squirts in the order Enterogona. They are colonial animals, and are distinguished from other sea squirts by the presence of relatively simple pharyngeal baskets. This provides the etymology of their name: in ancient greek, ά.πλοος-ους means `simple`. The posterior part of the abdomen contains the hea.....
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http://en.wikipedia.org/wiki/Aplousobranchia

(from the article `tunicate`) ...EnterogonaGonads unpaired, either within or behind intestinal loop; body may be divided into thorax and abdomen.Order AplousobranchiaGills simple, ...
Found on
http://www.britannica.com/eb/a-z/a/87
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