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n. pl.1.(Zool.) A division of Hydroidea in which the zooids are naked, or not inclosed in a capsule. See Tubularian.
References in periodicals archive ?
Suborden Athecata (Gymnoblastea, Anthomedusae), Thecata (Calyptoblastea, Leptomedusae) y Limnomedusae.
Teil: Campanulariidae, Halecidae, Lafoeidae, Campanulidae und Sertularidae, nebst Erganzungen zu den Athecata and Plumularidae.