Ultrastructure of spermiogenesis and spermatozoa of Discocotyle sagittata (Monogenea: Polyopisthocotylea: Discocotylinea)
Language English Country Czech Republic Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
11699656
DOI
10.14411/fp.2001.034
Knihovny.cz E-resources
- MeSH
- Cell Nucleus ultrastructure MeSH
- Microscopy, Electron methods MeSH
- Endoplasmic Reticulum ultrastructure MeSH
- Microscopy, Fluorescence methods MeSH
- Oncorhynchus mykiss parasitology MeSH
- Platyhelminths physiology ultrastructure MeSH
- Spermatids ultrastructure MeSH
- Spermatocytes ultrastructure MeSH
- Spermatogenesis * MeSH
- Spermatozoa ultrastructure MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Ultrastructural analysis revealed that the spermatozoon of Discocotyle sagittata (Leuckart, 1842) is composed of two parallel axonemes, mitochondrion, nucleus and cortical microtubules. The nucleus, which occupies a central/distal position and has an unusual crescent-shaped profile, is slightly shorter than the mitochondrial rod. The two axonemes, which are of unequal length, and the cortical microtubules (up to 68 forming a continuous ring in the principal region) extend almost the entire length of the spermatozoon. A fold of the plasma membrane creates a unilateral flange or undulating membrane. Epifluorescence microscopy indicated that spermatogenesis gives rise to clusters of 64 spermatids connected to a common cytophore. Spermiogenesis and the structure of the filiform sperm of D. sagittata conform to the typical polyopisthocotylean pattern.
References provided by Crossref.org
Spermatological characters of the aspidogastrean Aspidogaster limacoides Diesing, 1835
