Scu·ti·bran·chi·a·ta n. pl. Zool. An order of gastropod Mollusca having a heart with two auricles and one ventricle. The shell may be either spiral or shieldlike.
Note: ☞ It is now usually regarded as including only the Rhipidoglossa and the Docoglossa. When originally established, it included a heterogenous group of mollusks having shieldlike shells, such as Haliotis, Fissurella, Carinaria, etc.
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