epifrontal fold
(BRYOZOA: Gymnolaemata)
In Umbonulidae, a fold of the exterior body wall and body cavity arching over the frontal wall.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • umbonuloid — adj. [L. umbo, knob or boss; Gr. eidos, like] (BRYOZOA: Gymnolaemata) In cheilostomates, autozooids having frontal shields formed by calcification of the basal side of the epifrontal fold …   Dictionary of invertebrate zoology

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