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Gut structure and digestive cellular processes in marine Crustacea
Studies on the midgut of Centropages typicus (Copepod, Calanoid)
SummaryFrom a structural study of the midgut of Centropages typicus, three main zones presenting different cellular associations may be defined.The ultrastructural study carried out allows us to… Expand
Female genital structures in several families of Centropagoidea (Copepoda: Calanoida)
The female genital structures of 21 calanoid species belonging to the families Candaciidae, Centropagidae, Pontellidae, Sulcanidae, Temoridae and Tortanidae were studied using light and electron… Expand
Tegumental glands in a copepod Hemidiaptomus ingens: Structural, ultrastructural and cytochemical aspects.
Segmental tegumental glands in the calanoid copepods Hemidiaptomus ingens provinciae release secretions through pores which are located near the glands. These pores exhibit a partitioned structure.… Expand
Morphology and ultrastructure of the gut in Spadella cephaloptera (chaetognatha)
- J. Arnaud, M. Brunet, J. Casanova, J. Mazza, V. Pasqualini
- Biology, Medicine
- Journal of morphology
- 1 April 1996
Structural and ultrastructural studies on the gut of the chaetognath Spadella cephaloptera, as well as observations on the feeding behavior of specimens bred in the laboratory, were conducted. The… Expand
Female genital structures of Metridinidae (Copepoda: Calanoida)
Abstract The female genital structures of six calanoid copepod species, belonging to the genera Gaussia, Metridia and Pleuromamma, were studied using light and scanning electron microscopy (SEM). The… Expand
Labral glands in Centropages typicus (Copepoda, Calanoida). I. Sites of synthesis
In Centropages typicus the labrum contains two symmetric gland clusters on the right and left sides. Each cluster comprises two principal elements: a vast unit (AU) located in the anterior, distal… Expand
Cytochemical detection of phosphatase and arylsulphatase activities in the midgut of Centropages typicus (Copepod, Calanoid).
Ultrastructural study of the midgut of Calanoid Copepods revealed the presence of several cell types in all species. In a previous report we described and assigned a function to each of these cell… Expand
Morphological study of the gut in Sagitta setosa , S. serratodentata and S. pacifica (Chaetognatha). Functional implications in digestive processes
The study of the digestive epithelium in Sagitta setosa , S. serratodentata , and S. pacifica revealed only a few morphological and cytological differences among the three species. The gut was… Expand
[Oogenesis in Centropages typicus (Copepoda, Calanoida)].
We carried out a complete study of oogenesis in Centropages typicus using structural, ultrastructural and cytochemical data. The usual stages of oogenesis, i.e. germinative phase, premeiosis, primary… Expand