Intro 
Species 
Specimens 
Distribution 
Checklist 
Sources 
Log in 

Porifera source details

Watanabe, Y. (1978). Structure and formation of the collar in choanocytes of Tetilla serica (Lebwohl), Demosponge. Development, Growth and Differentiation. 20(1): 79-91.
341834
10.1111/j.1440-169x.1978.00079.x [view]
Watanabe, Y.
1978
Structure and formation of the collar in choanocytes of <i>Tetilla serica</i> (Lebwohl), Demosponge
Development, Growth and Differentiation
20(1): 79-91
Publication
Available for editors  PDF available [request]
There are two types of collar in the choanocytes of adult Tetilla serica: one type is a continuous cytoplasmic tube and the other consists of discontinuous microvilli. The former is found in the small flagellated chamber and is considered to belong to a young choanocyte in the process of differertiation. To confirm this idea, very young choanocytes which are about to differentiate the collar were examined during embryogenesis. The youngest choanocytes are noticed forming aggregations of small cells in 3-day larvae. Around the flagellum in each choanocyte, there is a depression which will become wider. At first, the collar is observed as a ring of cytoplasm; next this extends outward and becomes thinner, and finally it divides into microvilli. The microvillous collar is formed by the opening of vesicles and fusion of their membranes. These vesicles are considered to be derived from the Golgi complex. The process of collar formation through fusion of vesicles is discussed.
Japan
Biology
RIS (EndNote, Reference Manager, ProCite, RefWorks)
BibTex (BibDesk, LaTeX)
Date
action
by
2019-02-28 13:18:53Z
created



Website and databases developed and hosted by VLIZ · Page generated 2024-03-28 · contact: Nicole de Voogd