cryptocyst

cryptocyst: n. [Gr. kryptos, hidden; kystis, bladder]

(BRYOZOA: Gymnolaemata)

1. One of the two basic wall morphologies of bryozoans consisting of wholly interior walls, leaving a superficial hypostegal coelom uniting contiguous zooids; see gymnocyst.

2. A calcareous plate that functions as a hydrostatic organ in Cheilostomata; cryptocystal adj..

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gymnocyst — n. [Gr. gymnos, bare; kystis, bladder] 1. (BRYOZOA) A simple type of wall morphology that adds exterior walls to the ends of interior walls, thereby separating adjacent zooids that remain in communication through interzooidal pores. gymnocystal… … Dictionary of invertebrate zoology
opesiule — n. [Gr. dim. ope, hole] (BRYOZOA: Gymnolaemata) One of the small notches or pores in a cryptocyst through which the frontal membrane depressor muscles pass … Dictionary of invertebrate zoology
opesium — n.; pl. ia [Gr. dim. ope, hole] (BRYOZOA: Gymnolaemata) In Anasca, a large opening below the frontal membrane bordered by the cryptocyst; functioning as a passageway for the lophophore in some species … Dictionary of invertebrate zoology

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