The structure of the body cavity Pedicellina cernua (Pallas, 1775) and Barentsia discreta (Busk, 1886) (Kamptozoa, Coloniales)

The structure of the body cavity Pedicellina cernua (Pallas, 1775) and Barentsia discreta (Busk,... The body-cavity ultrastructure of two species of colonial Kamptozoa is investigated in detail. The body cavity is separated from all surrounding tissues by a basal lamina, which underlies the ectodermal and endodermal epithelia and covers the excretory system, gonads, muscular cells, and nerves that cross the body cavity. The basal lamina does not cover the body-cavity cells, which, in respect to this feature, can be classified as connective-tissue cells. Several types of cells were identified in the body cavity of the calyx: amoeboid cells, dark spindle-shaped cells, cells containing phagosomes, cells of dorsoventral bundles, and cells adjoining the surface of the internal organs (gonads, digestive and nervous systems). The tubular cells of the stalk and stolon, as well as the amoeboid cells of the stolon, are described. The body cavity of Kamptozoa is characterized by features that allow interpreting it as a hemocoel. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

The structure of the body cavity Pedicellina cernua (Pallas, 1775) and Barentsia discreta (Busk, 1886) (Kamptozoa, Coloniales)

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Publisher
Pleiades Publishing
Copyright
Copyright © 2014 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1134/S1063074014060133
Publisher site
See Article on Publisher Site

Abstract

The body-cavity ultrastructure of two species of colonial Kamptozoa is investigated in detail. The body cavity is separated from all surrounding tissues by a basal lamina, which underlies the ectodermal and endodermal epithelia and covers the excretory system, gonads, muscular cells, and nerves that cross the body cavity. The basal lamina does not cover the body-cavity cells, which, in respect to this feature, can be classified as connective-tissue cells. Several types of cells were identified in the body cavity of the calyx: amoeboid cells, dark spindle-shaped cells, cells containing phagosomes, cells of dorsoventral bundles, and cells adjoining the surface of the internal organs (gonads, digestive and nervous systems). The tubular cells of the stalk and stolon, as well as the amoeboid cells of the stolon, are described. The body cavity of Kamptozoa is characterized by features that allow interpreting it as a hemocoel.

Journal

Russian Journal of Marine BiologySpringer Journals

Published: Jan 7, 2015

References

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