Stegotricha enterikos gen.nov., sp.nov. (class Phyllopharyngea, order Rhynchodida), a parasitic ciliate in the digestive gland of Pacific oysters ( Crassostrea gigas ), and its distribution in British Columbia
Stegotricha enterikos gen.nov., sp.nov. is found in the lumen of the digestive gland tubules of Pacific oysters (Crassostrea gigas (Thunberg, 1793)), where it multiplies by transverse binary fission. Nondividing stages have an elongated ovoid body (49.8 ± 10.3 μm long and 18.1 ± 3.4 μm wide) covered...
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Language: | English |
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Canadian Science Publishing
1993
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Online Access: | http://dx.doi.org/10.1139/z93-285 http://www.nrcresearchpress.com/doi/pdf/10.1139/z93-285 |
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crcansciencepubl:10.1139/z93-285 2024-04-07T07:51:59+00:00 Stegotricha enterikos gen.nov., sp.nov. (class Phyllopharyngea, order Rhynchodida), a parasitic ciliate in the digestive gland of Pacific oysters ( Crassostrea gigas ), and its distribution in British Columbia Bower, S. M. Meyer, G. R. 1993 http://dx.doi.org/10.1139/z93-285 http://www.nrcresearchpress.com/doi/pdf/10.1139/z93-285 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 71, issue 10, page 2005-2017 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1993 crcansciencepubl https://doi.org/10.1139/z93-285 2024-03-08T00:37:49Z Stegotricha enterikos gen.nov., sp.nov. is found in the lumen of the digestive gland tubules of Pacific oysters (Crassostrea gigas (Thunberg, 1793)), where it multiplies by transverse binary fission. Nondividing stages have an elongated ovoid body (49.8 ± 10.3 μm long and 18.1 ± 3.4 μm wide) covered by about 16 evenly spaced, slightly oblique kineties (ciliary rows), except for a small naked area on one side of the posterior end. One kinety, associated with the naked area, is unusual, with cilia spaced two to three times as far apart as in the other somatic kineties. A cytopharyngeal structure composed of radially arrayed overlapping sheets of microtubules occurs at the anterior end and occasionally encompasses extrusomes. The centrally located macronucleus is large (about 16 × 12 μm) and the micronucleus (about 2.5 μm in diameter) is either posterior or anterior to the macronucleus. Except for the extent of ciliation, S. enterikos is most closely affiliated with the family Ancistrocomidae. Instead of creating a new family, we suggest that the diagnosis of the Ancistrocomidae be expanded to include ciliates with complete ciliation. Stegotricha enterikos was found in 2.5–72.5% of the oysters (n = 40) sampled between November 1985 and March 1990 from 35 localities in British Columbia. Most infections (86%) were light (1–9 ciliates per wet mount of digestive gland tissue). However, there was no evidence of pathogenesis in 22 oysters with heavy infections (more than 25 ciliates per wet mount). Article in Journal/Newspaper Crassostrea gigas Canadian Science Publishing Pacific Canadian Journal of Zoology 71 10 2005 2017 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Bower, S. M. Meyer, G. R. Stegotricha enterikos gen.nov., sp.nov. (class Phyllopharyngea, order Rhynchodida), a parasitic ciliate in the digestive gland of Pacific oysters ( Crassostrea gigas ), and its distribution in British Columbia |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Stegotricha enterikos gen.nov., sp.nov. is found in the lumen of the digestive gland tubules of Pacific oysters (Crassostrea gigas (Thunberg, 1793)), where it multiplies by transverse binary fission. Nondividing stages have an elongated ovoid body (49.8 ± 10.3 μm long and 18.1 ± 3.4 μm wide) covered by about 16 evenly spaced, slightly oblique kineties (ciliary rows), except for a small naked area on one side of the posterior end. One kinety, associated with the naked area, is unusual, with cilia spaced two to three times as far apart as in the other somatic kineties. A cytopharyngeal structure composed of radially arrayed overlapping sheets of microtubules occurs at the anterior end and occasionally encompasses extrusomes. The centrally located macronucleus is large (about 16 × 12 μm) and the micronucleus (about 2.5 μm in diameter) is either posterior or anterior to the macronucleus. Except for the extent of ciliation, S. enterikos is most closely affiliated with the family Ancistrocomidae. Instead of creating a new family, we suggest that the diagnosis of the Ancistrocomidae be expanded to include ciliates with complete ciliation. Stegotricha enterikos was found in 2.5–72.5% of the oysters (n = 40) sampled between November 1985 and March 1990 from 35 localities in British Columbia. Most infections (86%) were light (1–9 ciliates per wet mount of digestive gland tissue). However, there was no evidence of pathogenesis in 22 oysters with heavy infections (more than 25 ciliates per wet mount). |
format |
Article in Journal/Newspaper |
author |
Bower, S. M. Meyer, G. R. |
author_facet |
Bower, S. M. Meyer, G. R. |
author_sort |
Bower, S. M. |
title |
Stegotricha enterikos gen.nov., sp.nov. (class Phyllopharyngea, order Rhynchodida), a parasitic ciliate in the digestive gland of Pacific oysters ( Crassostrea gigas ), and its distribution in British Columbia |
title_short |
Stegotricha enterikos gen.nov., sp.nov. (class Phyllopharyngea, order Rhynchodida), a parasitic ciliate in the digestive gland of Pacific oysters ( Crassostrea gigas ), and its distribution in British Columbia |
title_full |
Stegotricha enterikos gen.nov., sp.nov. (class Phyllopharyngea, order Rhynchodida), a parasitic ciliate in the digestive gland of Pacific oysters ( Crassostrea gigas ), and its distribution in British Columbia |
title_fullStr |
Stegotricha enterikos gen.nov., sp.nov. (class Phyllopharyngea, order Rhynchodida), a parasitic ciliate in the digestive gland of Pacific oysters ( Crassostrea gigas ), and its distribution in British Columbia |
title_full_unstemmed |
Stegotricha enterikos gen.nov., sp.nov. (class Phyllopharyngea, order Rhynchodida), a parasitic ciliate in the digestive gland of Pacific oysters ( Crassostrea gigas ), and its distribution in British Columbia |
title_sort |
stegotricha enterikos gen.nov., sp.nov. (class phyllopharyngea, order rhynchodida), a parasitic ciliate in the digestive gland of pacific oysters ( crassostrea gigas ), and its distribution in british columbia |
publisher |
Canadian Science Publishing |
publishDate |
1993 |
url |
http://dx.doi.org/10.1139/z93-285 http://www.nrcresearchpress.com/doi/pdf/10.1139/z93-285 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Canadian Journal of Zoology volume 71, issue 10, page 2005-2017 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z93-285 |
container_title |
Canadian Journal of Zoology |
container_volume |
71 |
container_issue |
10 |
container_start_page |
2005 |
op_container_end_page |
2017 |
_version_ |
1795667139265298432 |