Frosted glass-whiskers (Sclerophora peronella) COSEWIC assessment and status report: chapter 1

Assessment Summary

Assessment Summary – May 2005

Common name: Frosted glass-whiskers (Nova Scotia population)

Scientific name: Sclerophora peronella

Status: Special Concern

Reason for designation: This tiny cryptic stubble lichen is very rare or threatened over much of its global range. Two of the three known locations of this species in Canada are in Nova Scotia. Despite considerable efforts to locate this and other rare calicioid lichens in the province, this lichen is known only from the exposed heartwood of red maple trees in mature/old growth hardwood forest. Threats include potential habitat loss and degradation associated with the decline of old growth forest ecosystems. However, in Nova Scotia each of the two populations appear healthy and are situated within large protected areas on Cape Breton Island.

Occurrence: Nova Scotia

Status history: Designated Special Concern in May 2005. Assessment based on a new status report.

 

Assessment Summary – May 2005

Common name: Frosted glass-whiskers (British Columbia population)

Scientific name: Sclerophora peronella

Status: Data Deficient

Reason for designation: This tiny cryptic stubble lichen is very rare or threatened over much of its global range. The species is known from only one site in the north-central part of the province where it was found once on a large cottonwood. Although search effort for stubble lichens has been extensive in regions farther south within the province, search effort in the northern region where the species was found was inadequate.

Occurrence: British Columbia

Status history: Species considered in May 2005 and placed in the Data Deficient category. Assessment based on a new status report.

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