Parenchymula

parenchymula

[‚par·əŋ′kim·yə·lə]
(invertebrate zoology)
The flagellate larva of calcinean sponges in which there is a cavity filled with gelatinous connective tissue.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Parenchymula

 

one of the free-swimming larval stages of sponges and numerous coelenterates. The elongated oval body consists of flagellate ectodermal cells and a mass of entodermal cells (parenchyma). In sponges, the parenchymula settles to the bottom and becomes attached; in coelenterates, it changes into the planula stage.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The objectives of this study were to measure transport and metabolism of an amino acid and a fatty acid from seawater, to determine the rates of oxygen consumption, and to follow the distribution of a [sup.3.H] label within the larval body fusing light-microscopic autoradiography) in field-collected parenchymula larvae of the demosponge Tedania ignis.
Field-collected parenchymula larvae of Tedania ignis are orange-red in coloration and averaged 818.5 [plus or minus] 17.5 [Mu]m in length and 576.3 [plus or minus] [Mu]m in width (both mean [plus or minus] standard error (SE); n = 16 larvae).
The average weight of a Tedania parenchymula larva was 16.99 [plus or minus] 0.72 [Mu]g/larva (mean [plus or minus] 1 SE, n = 14 groups of larvae @ [is less than] 7 larvae/group).
Although parenchymula larvae of Tedania ignis lack a functional digestive system, these larvae have the physiological capacity to acquire nutrients and energy from their environment through the transport of DOM from seawater.