The aquatic oribatid mite genus Mucronothrus in Canada and the western U.S.A. (Acari: Trhypochthoniidae)
The aquatic oribatid mite genus Mucronothrus (Trhypochthoniidae) is redescribed on the basis of characters of adults and immatures and its familial placement is reviewed. It is represented in North America by two species. Mucronothrus nasalis, a globally widespread species, is redescribed on the bas...
Published in: | Canadian Journal of Zoology |
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Language: | English |
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Canadian Science Publishing
1996
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Online Access: | http://dx.doi.org/10.1139/z96-106 http://www.nrcresearchpress.com/doi/pdf/10.1139/z96-106 |
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crcansciencepubl:10.1139/z96-106 2024-09-30T14:38:54+00:00 The aquatic oribatid mite genus Mucronothrus in Canada and the western U.S.A. (Acari: Trhypochthoniidae) Norton, Roy A. Behan-Pelletier, Valerie M. Wang, Hui-fu 1996 http://dx.doi.org/10.1139/z96-106 http://www.nrcresearchpress.com/doi/pdf/10.1139/z96-106 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 74, issue 5, page 926-949 ISSN 0008-4301 1480-3283 journal-article 1996 crcansciencepubl https://doi.org/10.1139/z96-106 2024-09-19T04:09:49Z The aquatic oribatid mite genus Mucronothrus (Trhypochthoniidae) is redescribed on the basis of characters of adults and immatures and its familial placement is reviewed. It is represented in North America by two species. Mucronothrus nasalis, a globally widespread species, is redescribed on the basis of all active instars. In Canada it is now known from Newfoundland, New Brunswick, Ontario, Quebec, Saskatchewan, Alberta, and British Columbia and in the U.S.A. from Oregon and Colorado. Ancillary new distribution records include England and Cape Horn. Misinterpretations of homologies of leg setae in the literature are corrected. A population near Toronto, Ontario, was examined for variation in genital and leg setation; this conforms well with previously described geographic patterns (J. Travé). This population exhibits previously unknown variation in cheliceral form. A second species, Mucronothrus willmanni n.sp., is proposed on the basis of adults and tritonymphs. Current records are from California, Oregon, and Montana, where it inhabits riffles in streams. Only females are known and, like M. nasalis, the species appears to be thelytokous. Article in Journal/Newspaper Newfoundland Mite Canadian Science Publishing Canada British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Cape Horn ENVELOPE(-135.021,-135.021,61.583,61.583) Canadian Journal of Zoology 74 5 926 949 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
The aquatic oribatid mite genus Mucronothrus (Trhypochthoniidae) is redescribed on the basis of characters of adults and immatures and its familial placement is reviewed. It is represented in North America by two species. Mucronothrus nasalis, a globally widespread species, is redescribed on the basis of all active instars. In Canada it is now known from Newfoundland, New Brunswick, Ontario, Quebec, Saskatchewan, Alberta, and British Columbia and in the U.S.A. from Oregon and Colorado. Ancillary new distribution records include England and Cape Horn. Misinterpretations of homologies of leg setae in the literature are corrected. A population near Toronto, Ontario, was examined for variation in genital and leg setation; this conforms well with previously described geographic patterns (J. Travé). This population exhibits previously unknown variation in cheliceral form. A second species, Mucronothrus willmanni n.sp., is proposed on the basis of adults and tritonymphs. Current records are from California, Oregon, and Montana, where it inhabits riffles in streams. Only females are known and, like M. nasalis, the species appears to be thelytokous. |
format |
Article in Journal/Newspaper |
author |
Norton, Roy A. Behan-Pelletier, Valerie M. Wang, Hui-fu |
spellingShingle |
Norton, Roy A. Behan-Pelletier, Valerie M. Wang, Hui-fu The aquatic oribatid mite genus Mucronothrus in Canada and the western U.S.A. (Acari: Trhypochthoniidae) |
author_facet |
Norton, Roy A. Behan-Pelletier, Valerie M. Wang, Hui-fu |
author_sort |
Norton, Roy A. |
title |
The aquatic oribatid mite genus Mucronothrus in Canada and the western U.S.A. (Acari: Trhypochthoniidae) |
title_short |
The aquatic oribatid mite genus Mucronothrus in Canada and the western U.S.A. (Acari: Trhypochthoniidae) |
title_full |
The aquatic oribatid mite genus Mucronothrus in Canada and the western U.S.A. (Acari: Trhypochthoniidae) |
title_fullStr |
The aquatic oribatid mite genus Mucronothrus in Canada and the western U.S.A. (Acari: Trhypochthoniidae) |
title_full_unstemmed |
The aquatic oribatid mite genus Mucronothrus in Canada and the western U.S.A. (Acari: Trhypochthoniidae) |
title_sort |
aquatic oribatid mite genus mucronothrus in canada and the western u.s.a. (acari: trhypochthoniidae) |
publisher |
Canadian Science Publishing |
publishDate |
1996 |
url |
http://dx.doi.org/10.1139/z96-106 http://www.nrcresearchpress.com/doi/pdf/10.1139/z96-106 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-135.021,-135.021,61.583,61.583) |
geographic |
Canada British Columbia Cape Horn |
geographic_facet |
Canada British Columbia Cape Horn |
genre |
Newfoundland Mite |
genre_facet |
Newfoundland Mite |
op_source |
Canadian Journal of Zoology volume 74, issue 5, page 926-949 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z96-106 |
container_title |
Canadian Journal of Zoology |
container_volume |
74 |
container_issue |
5 |
container_start_page |
926 |
op_container_end_page |
949 |
_version_ |
1811641488591814656 |