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- Title
Ultrastructural observations of spermatogenesis in the fungivorous nematode Paraphelenchus myceliophthorus Goodey, 1958 (Rhabditida: Aphelenchoidea, Aphelenchidae).
- Authors
Yushin, Vladimir V.; Ryss, Alexander
- Abstract
Summary: Spermatogenesis in Paraphelenchus myceliophthorus is similar to that of the 'rhabditid' nematodes. The sperm development includes formation of complexes of fibrous bodies (FB) and membranous organelles (MO), which appear in spermatocytes; the complexes dissociate in the spermatids and the immature sperm contains separate FB and MO. Mature spermatozoa from the uterus are bipolar cells subdivided into anterior pseudopod and posterior main cell body containing a nucleus without a nuclear envelope, numerous mitochondria and peripheral MO opening to the exterior via pores. The mature spermatozoa in the uterus form chains of more than ten flattened cells. Spermatogenesis characters, such as nuclear satellites, presence of FB in immature spermatozoa, small knobbles of MO, specific dense inclusions, absence of filopodia and sperm conjugation, make spermatozoa of P. myceliophthorus morphologically specific for comparative analysis with representatives of Aphelenchoidea and other rhabditids.
- Subjects
RHABDITIDA; NUCLEAR membranes; BIPOLAR cells; SPERMATOGENESIS; SPERMATOZOA; FILOPODIA; ORGANELLES
- Publication
Nematology, 2021, Vol 23, Issue 4, p357
- ISSN
1388-5545
- Publication type
Article
- DOI
10.1163/15685411-bja10046