planula


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Related to planula: scyphistoma, Colloblast

planula

 [plan´u-lah]
a larval coelenterate.

plan·u·la

, pl.

plan·u·lae

(plan'yū-lă, -lē),
Name given by Lankester to a coelenterate embryo when it consists of the two primary germ layers only, the ectoderm and endoderm.
[L. dim. of planum, flat surface]

planula

/plan·u·la/ (plan´ūl-ah)
1. a larval coelenterate.
2. something resembling such an animal.

planula

the ciliated larva of coelenterates, which lacks a body cavity.

planula

a larval coelenterate.
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References in periodicals archive ?
This polyp originates from a sexually produced planula which, once settled, begins building a skeleton attached to the substrate.
In contrast to their adult counterparts, swimming planula larvae of most corals have not yet accumulated a high bacterial load from the surrounding environment or by feeding (Apprill et al, 2009; Sharp et al, 2010); as a result, it is more tractable to characterize and quantify the associated bacterial component in these larvae.
In the present study, we investigated the photosensory physiology of coral planula tissue by using a microelectrode to record changes in its electrical potential when exposed to flashes of light.
Hatched planula larvae were allowed to attach to the underside of polystyrene petri dishes (9-cm diameter) floating on the water surface in the containers.
competence, and long-distance dispersal of planula larvae of the coral Pocillopora damicornis.
They are characterized by (1) a distinctive arrangement of radially disposed septa (= mesenteries) and two rows of tentacles; (2) the lack of skeleton (except for the genus Savalia), with most species incorporating sand grains into their tissue; (3) a distinctive, modified planula larva, either "zoanthella" or "zoanthina.
Sexual reproduction in solitary corals: Overlapping oogenic and brooding cycles, and benthic planulas in Balanophyllia elegans.