A study of the spirocytes from the Ceriantharia and Actiniaria (Cnidaria: Anthozoa)

Rifkin J.F. (1991) A study of the spirocytes from the Ceriantharia and Actiniaria (Cnidaria: Anthozoa). Cell and Tissue Research, 266 2: 365-373. doi:10.1007/BF00318192


Author Rifkin J.F.
Title A study of the spirocytes from the Ceriantharia and Actiniaria (Cnidaria: Anthozoa)
Journal name Cell and Tissue Research   Check publisher's open access policy
ISSN 0302-766X
Publication date 1991-01-01
Sub-type Article (original research)
DOI 10.1007/BF00318192
Open Access Status Not yet assessed
Volume 266
Issue 2
Start page 365
End page 373
Total pages 9
Publisher Springer-Verlag
Subject 2702 Anatomy
1308 Clinical Biochemistry
1307 Cell Biology
Abstract The structure and ultrastructure of ceriantharian and actiniarian spirocysts were compared. In the ceriantharian spirocyst, the apical cap consisted of two layers and the wall consisted of three, whereas in the actiniarian spirocyst, the number of layers was reversed. The inner wall of the ceriantharian spirocyst was smooth in longitudinal section whilst that of the actiniarian was serrated. The apical ends of ceriantharian spirocytes posessed either a set of microvilli or an arrangement that included both microvilli and a flagellum. The actiniarian spirocyte possessed only microvilli. Fine tubules occupying the undischarged tube of the ceriantharian spirocysts were of both moderate and strong electron densities, whilst those of the actiniarian were consistently electrondense. Undischarged ceriantharian spirocytes possessed tubules situated in the pleats and in the centre of the tube, whilst the tubes of undischarged actiniarian spirocytes possessed only centrally placed tubules. Fine electron-dense filaments linking the cell membrane to the spirocyst were present at the apical ends of actiniarian spirocytes. A different electron-dense network of filaments was present in the apical end of ceriantharian spirocytes. All cnidae of ceriantharians lacked tripartite opercula whilst the nematocysts of actiniarians possessed them. Primitive features of ceriantharian cnidae are discussed.
Keyword Ceriantharia, Actiniari: Cerianthus sp., Stichodactyla haddoni Cnidaria
Nematocytst
Spirocyst
Spirocyte
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 16 Aug 2016, 13:02:48 EST by System User