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COSEWIC assessment and status report on the Alkaline Wing-nerved Moss in Canada


Global Range

Pterygoneurum kozlovii has been reported from western Canada in North America (Figure 3; first reported by McIntosh 1986, 1989), central Europe (Czechoslovakia and the Ukraine), and China (Missouri Botanical Garden 2002). It has not, surprisingly, been reported yet from the United States, even though potentially supportive habitats are common (many of these habitats in adjacent areas in Washington State have been searched; it may also have been collected by T. McIntosh in 1990 from North Dakota, but this collection has been misplaced and it cannot be confirmed).

Figure 3: North American Distribution of Pterygoneurum kozlovii

 North American distribution of Pterygoneurum kozlovii

Canadian Range

The species has a scattered distribution. One population of Pterygoneurum kozlovii has been reported from Saskatchewan (reported here for the first time; Collection Examined #10) and 24 populations have been reported from British Columbia (Figure 4; Table 1). In the latter province, it is restricted to the drier portions of the province where seasonally wet alkaline habitats are characteristic components of the local ecosystems. Twenty-two populations have been reported from three areas in the south-central part of the province: nine in the south Okanagan Valley, concentrated around Osoyoos, six in the North Thompson River valley from Kamloops to the Ashcroft area, and seven in the Cariboo Region west and south-west of Williams Lake. Two additional populations have been reported from the Rocky Mountain Trench.

Figure 4: Canadian Distribution of Pterygoneurum kozlovii (Excluding the Potential Population in the Yukon)

Canadian distribution of Pterygoneurum kozlovii (excluding the potential population in the Yukon).

Numbered points correspond to the population numbers from Table 2. Filled circles represent locations that were confirmed in 2002, hollow circles are earlier records that were not confirmed in 2002, and hollow squares are locations that are possibly extirpated. In the cluster of dots south of Penticton, the numbers corresponding to filled circles are on the left side of the cluster only. Note also that populations 2, 3 and 4 are indistinguishable at this scale.

Major collection efforts contributing to our present knowledge of the Canadian distribution include the following: 1) surveys conducted as part of the Ph.D. research of T. McIntosh from 1980 to 1983, 2) a provincial arid-land survey conducted by T. McIntosh (1997-2001), and 3) field work conducted by T. McIntosh in 2002-2003, in support of a COSEWIC assessment.

Table 1: Estimated Numbers of 'Potential Habitat' Alkaline Areas in British Columbia, Including Visitation and Collection Information
RegionNumber of potential sitesaApproximate number of sites visitedNumbers of known sites
Kootenay8 - 1072
Okanagan (from Osoyoos to the SE base of Richter Mountain westwards and to just north of Kaledon to the north)20 - 2518 - 209
Kamloops (from just east of the city to Spences Bridge/Cache Creek, and including the Pavilion and Clinton areas, although somewhat disjunct)28 -3222 - 256
Cariboo (mainly in areas along the Fraser and Chilcotin Valleys, but also north and east of Chasm north of Clinton)37 - 4428 -327

Potential sites are defined as sites separated by at least .5 km, (but usually much more) and separated by landscapes that do not contain the potential habitats.

a A number of individuals who have expert knowledge about the geographical extent and ecological condition of provincial alkaline areas were consulted, including Ray Coupe, Hans Roemer, Fred Knezevich, Don Gayton, and Kent Watson. See also section on Authorities Contacted.