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Ultrastructual study and description of Paramyxoides nephtys gen. n., sp n. a parasite of Nephtys caeca (Fabricius, 1780) (Polychaeta : Nephtyidae)

Larsson, Ronny LU and Koie, M (2005) In Acta Protozoologica 44(2). p.175-187
Abstract
The new paramyxean Paramyxoides nephtys gen. n., sp. n. is described based on cytological characters. The organism reproduces by endogenous budding, and sporogony is the only sequence of reproduction observed. A primary cell with narrow haplosporosomes gives rise to two or four secondary cells (sporonts), each yielding four tetracellular spores in which the cells are situated one within the other. Spores fusiform, about 10 mu m long, arranged with the long axes in parallel to a fusiform to globular body with terminal, striated projections. Nuclei are arranged in a line. Two of the spore cells (cells 4-5) have haplosporosomes. Haplosporosomes of cell 4 are spherical, measuring 80-300 nm in diameter, of cell 5 rod-like 70-100 nm wide. The... (More)
The new paramyxean Paramyxoides nephtys gen. n., sp. n. is described based on cytological characters. The organism reproduces by endogenous budding, and sporogony is the only sequence of reproduction observed. A primary cell with narrow haplosporosomes gives rise to two or four secondary cells (sporonts), each yielding four tetracellular spores in which the cells are situated one within the other. Spores fusiform, about 10 mu m long, arranged with the long axes in parallel to a fusiform to globular body with terminal, striated projections. Nuclei are arranged in a line. Two of the spore cells (cells 4-5) have haplosporosomes. Haplosporosomes of cell 4 are spherical, measuring 80-300 nm in diameter, of cell 5 rod-like 70-100 nm wide. The host is the polychaete Nephrys caeca, and the parasite develops intracellularly in the gut epithelium in direct contact with the cytoplasm of the host cell. About 3% of studied hosts harboured the parasite. This is the first report of Paramyxea from Scandinavia. (Less)
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organization
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Contribution to journal
publication status
published
subject
keywords
Paramyxoides nephtys gen. n., Paramyxea, Nephtys caeca, Oresund, sporogony, polychaete parasite, sp n.
in
Acta Protozoologica
volume
44
issue
2
pages
175 - 187
publisher
NENCKI INST EXPERIMENTAL BIOLOGY
external identifiers
  • wos:000228739400009
  • scopus:17844393130
ISSN
0065-1583
language
English
LU publication?
yes
id
31d8b8a1-769c-417b-81d9-95fda02d1dcb (old id 244579)
date added to LUP
2007-09-28 12:26:27
date last changed
2017-01-01 07:13:55
@article{31d8b8a1-769c-417b-81d9-95fda02d1dcb,
  abstract     = {The new paramyxean Paramyxoides nephtys gen. n., sp. n. is described based on cytological characters. The organism reproduces by endogenous budding, and sporogony is the only sequence of reproduction observed. A primary cell with narrow haplosporosomes gives rise to two or four secondary cells (sporonts), each yielding four tetracellular spores in which the cells are situated one within the other. Spores fusiform, about 10 mu m long, arranged with the long axes in parallel to a fusiform to globular body with terminal, striated projections. Nuclei are arranged in a line. Two of the spore cells (cells 4-5) have haplosporosomes. Haplosporosomes of cell 4 are spherical, measuring 80-300 nm in diameter, of cell 5 rod-like 70-100 nm wide. The host is the polychaete Nephrys caeca, and the parasite develops intracellularly in the gut epithelium in direct contact with the cytoplasm of the host cell. About 3% of studied hosts harboured the parasite. This is the first report of Paramyxea from Scandinavia.},
  author       = {Larsson, Ronny and Koie, M},
  issn         = {0065-1583},
  keyword      = {Paramyxoides nephtys gen. n.,Paramyxea,Nephtys caeca,Oresund,sporogony,polychaete parasite,sp n.},
  language     = {eng},
  number       = {2},
  pages        = {175--187},
  publisher    = {NENCKI INST EXPERIMENTAL BIOLOGY},
  series       = {Acta Protozoologica},
  title        = {Ultrastructual study and description of Paramyxoides nephtys gen. n., sp n. a parasite of Nephtys caeca (Fabricius, 1780) (Polychaeta : Nephtyidae)},
  volume       = {44},
  year         = {2005},
}