Eutardigrada from Vancouver Island, British Columbia, Canada, including a description of <i>Platicrista cheleusis</i> n.sp.

Kathman, R. Deedee

doi:10.1139/z90-268

Cited by 25 publications

(13 citation statements)

References 6 publications

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“…Based on descriptions and diagrams in Argue (1971Argue ( , 1972Argue ( , 1974, Morgan and King (1976), Ramazzotti and Maucci (1983), Kathman (1989Kathman ( , 1990, Bertolani and Rebecchi (1993), and Kinchin (1994), 4 types of eggs were recovered and identified as belonging to Macrobiotus crenulatus, M. harmsworthi, M. cf. hufelandi, and Minibiotus cf.…”

Section: Resultsmentioning

confidence: 99%

“…Identification of the specimens was based primarily on the work of Ramazzotti and Maucci (1983) with additional information on individual species from Bertolani and Rebecchi (1993), Kathman (1989Kathman ( , 1990, and Kathman and Cross (1991). The microscope slides containing the adults and eggs (K2005: numbers 001-415) are held in the Biology Department, Memorial University.…”

Section: Methodsmentioning

confidence: 99%

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The Timing of Egg-laying in Macrobiotid Species (Tardigrada) on the Island of Newfoundland

Brake¹,

Collins²

2016

Can Field Nat

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Brake, Kyla K., and Michael A. J. Collins. 2016. The timing of egg-laying in macrobiotid species (Tardigrada) on the island of Newfoundland. Canadian Field-Naturalist 130(1): 34-37.Previous sampling of lichens and mosses on the island of Newfoundland has not located any macrobiotid (family Macrobiotidae) eggs, which are often crucial to the positive identification of adults of this family, particularly Macrobiotus and Minibiotus species. Because recent studies have established that egg-laying in macrobiotid species in the more northerly Labrador part of the province occurs in late summer and early fall, it was hypothesized that egg-laying on the more southerly island of Newfoundland would take place later in the year. In this study, conducted on the Burin Peninsula from September to December 2005, moss samples were taken every 2 weeks and macrobiotid adults and eggs were extracted. The eggs of 3 species of Macrobiotus and 1 species of Minibiotus were recovered later in the fall after the first frost.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

The Timing of Egg-laying in Macrobiotid Species (Tardigrada) on the Island of Newfoundland

Brake¹,

Collins²

2016

Can Field Nat

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“…islandicus. Platicrista cheleusis has only ever been recorded previously in British Columbia (Kathman 1990). Table 1 shows the distribution patterns of the nine tardigrades identified to species and locations in Canada where they have been previously recorded.…”

Section: Resultsmentioning

confidence: 99%

“…Ramazzotti and Maucci (1983) describe this species as neither frequently found nor hard to find suggesting that it may have a widespread distribution but generally low abundance. Platycrista cheleusis has previously found only on Vancouver Island, British Columbia (Kathman 1990). The remaining seven species are reported to have widespread to cosmopolitan distributions and therefore it is not surprising to identify them from Alberta mosses.…”

Section: Discussionmentioning

confidence: 98%

Water-bears from the Rocky Mountains: A First Look at Alberta's Tardigrade Fauna

Boeckner

Proctor

2005

Can Field Nat

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There is no information in the published literature regarding Alberta’s terrestrial water-bear (Tardigrada) fauna. We surveyed across an elevational gradient (1100 – 1800 ft) on Black Cat Mountain in the Alberta Rocky Mountain range. Ten taxa were identified from 902 specimens, all of which are new records for Alberta and one species is new for Canada: Macrobiotus cf. islandicus Richters, 1904. There was no clear relationship between elevation and tardigrade distribution, possibly owing to patchiness of these animals in the field and lack of adequate replication at each elevation.

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“…It was recorded from various northern areas, such as the Svalbard Archipelago (Dastych 1985;Maucci 1996;Zawierucha et al 2013), Greenland (Petersen 1951), Taimyr Peninsula and Novaya Zemlya (Biserov 1996(Biserov , 1999, Vancouver Island (Kathman 1990), and Colorado (Beasley 1990). Another group of records constitute mountain populations (possibly postglacial relicts), e.g., Töw Province in Mongolia (Iharos 1965(Iharos , 1968 or the Elburz Range in Iran (Dastych 1972).…”

Section: Geographic Distribution Of the Speciesmentioning

confidence: 99%

Integrative redescription of a common Arctic water bear Pilatobius recamieri (Richters, 1911)

et al. 2017

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Tardigrada are a group of microscopic metazoans that inhabit a variety of ecosystems throughout the world, including polar regions, where they are a constant element of microfauna with densities exceeding hundreds of individuals per gram of dry plant material. However, despite a long history of research and their ubiquity in tundra ecosystems, the majority of tardigrade species have limited and outdated diagnoses. One such example is Pilatobius recamieri, a common tardigrade that is widely distributed in the Arctic. The aim of this study is to redescribe this species using new material from the type locality and tools of integrative taxonomy, viz. by combining classical imaging and morphometry by light microscopy and scanning electron microscopy imaging with DNA sequencing of four markers with various mutation rates: three nuclear (18S rRNA, 28S rRNA, and ITS-2) and one mitochondrial (COI). The sequences of the three latter markers are also the first to be presented for the genus Pilatobius. This study therefore provides the first necessary step towards the verification of the geographic range of P. recamieri, which is currently assumed to be very broad. A detailed comparison of P. recamieri with Pilatobius secchii (Bertolani and Rebecchi, 1996) from Italy revealed no morphological or morphometric differences between the two species, thus we designate P. secchii as a nomen inquirendum until molecular data for the taxon become available. Finally, we propose to replace the term ''lunula'' in the superfamilies Hypsibioidea and Isohypsibioidea with the more appropriate ''pseudolunula'' to differentiate it from the true lunula in other parachelans.

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Eutardigrada from Vancouver Island, British Columbia, Canada, including a description of Platicrista cheleusis n.sp.

Cited by 25 publications

References 6 publications

The Timing of Egg-laying in Macrobiotid Species (Tardigrada) on the Island of Newfoundland

The Timing of Egg-laying in Macrobiotid Species (Tardigrada) on the Island of Newfoundland

Water-bears from the Rocky Mountains: A First Look at Alberta's Tardigrade Fauna

Integrative redescription of a common Arctic water bear Pilatobius recamieri (Richters, 1911)

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