This page lists the species of lichens that Committee on the Status of Endangered Wildlife in Canada (COSEWIC) recognizes as being at risk in Canada. Each at risk species is assessed and placed in one of the following categories, as defined by COSEWIC:[1]
- Endangered: A species facing imminent extirpation or extinction.
- Threatened: A species that is likely to become endangered if nothing is done to reverse the factors leading to its extirpation or extinction.
- Special Concern: A species that may become threatened or endangered because of a combination of biological characteristics and identified threats.
- Data Deficient: A category that applies when the available information is insufficient (a) to resolve a wildlife species' eligibility for assessment or (b) to permit an assessment of the wildlife species' risk of extinction.
Endangered edit
- Erioderma mollissimum[2]
- Erioderma pedicellatum (Atlantic population)[3]
- Heterodermia sitchensis[4]
- Physconia subpallida[5]
Threatened edit
Special concern edit
- Erioderma pedicellatum (boreal population)[7]
- Hypogymnia heterophylla[8]
- Nephroma occultum[9]
- Pseudevernia cladonia[10]
- Pseudocyphellaria rainierensis[11]
- Sclerophora peronella (Nova Scotia population)[12]
Data deficient edit
Species currently being assessed edit
High priority candidates for assessment edit
Rare lichens edit
Rare lichens in Canada list:[17]
Occuring entirely or mostly in Canada edit
Greatest risk edit
- Erioderma pedicellatum
- Heterodermia sitchensis
- Sticta oroborealis: foliose form is in danger of extirpation, shrubby form is vulnerable
Less risk edit
North America endemic species occurring equally in Canada and USA edit
Greatest risk edit
Less risk edit
- Amygdalaria continua
- Amygdalaria haidensis
- Brigantiaea fuscolutea
- Bryoria carlottae
- Bryoria cervinula
- Bryoria salazinica
- Cetrelia alaskana
- Cladonia schofieldii
- Cladonia thomsonii
- Heterodermia squamulosa
- Hydrothyria venosa
- Massalongia microphylliza
- Nephroma occultum
- Ophioparma rubricosa: Also listed as primarily in USA, and at greater risk
- Physconia thomsonii
- Pseudevernia cladonia
- Pseudocyphellaria rainierensis
- Psora tenuifolia
- Teloschistes arcticus
North America endemic species occurring primarily in the USA edit
Greatest risk edit
- Alectoria fallacina: Possibly extirpated in Canada
- Leptogium dactylinum: Possibly extirpated in Canada
Less risk edit
- Alectoria imshaugii
- Buellia dialyta
- Hypogymnia heterophylla
- Neofuscelia subhosseana
- Pertusaria globularis
- Physcia callosa
- Xanthoparmelia planilobata
Widespread species occurring in North America entirely or primarily within Canada edit
Greatest risk edit
- Acroscyphus sphaerophoroides
- Collema auriforme
- Collema callopismum
- Degelia plumbea
- Dictyonema moorei
- Pertusaria hakkodensis
- Psora vallesiaca
- Sclerophora peronella
- Stereocaulon depreaultii
- Sticta canariensis
Less risk edit
- Bactrospora brodoi
- Cliostomum leprosum
- Dermatocarpon linkolae
- Leptogium subtile
- Polychidium contortum
- Umbilicaria aprina
- Umbilicaria leiocarpa
Widespread species occurring in North America equally in Canada and the USA edit
Greatest risk edit
- Erioderma sorediatum
- Heterodermia hypoleuca: Possibly extirpated in Canada
- Hypogymnia pulverata
- Leioderma sorediatum
- Leptogium brebissonii
- Sticta arctica
- Sticta wrightii
- Usnea esperantiana
- Usnea rubicunda
Less risk edit
- Cetraria kamczatica
- Cladina ciliata
- Cladonia luteoalba
- Collema glebulentum
- Collema limosum
- Everniastrum catawbiense
- Fuscopannaria laceratula
- Fuscopannaria leucosticta: Not in list
- Glypholecia scabra
- Gypsoplaca macrophylla
- Heterodermia leucomela: syn. Heterodermia leucomelaena
- Lempholemma polyanthes
- Leptogium arcticum
- Leptogium laceroides
- Lithographa tesserata
- Lobaria retigera
- Pannaria hookeri
- Parmeliella arctophila
- Physcia dimidiata
- Pilophorus cereolus
- Pilophorus nigricaulis: Not in list
- Pilophorus robustus
- Pilophorus vegae
- Tuckermannopsis inermis
- Umbilicaria caroliniana
- Umbilicaria hirsuta
- Usnea ceratina
- Usnea sphacelata
- Zahlbrucknerella calcarea
Widespread species occurring primarily in the USA edit
Greatest risk edit
- Cladonia prolifica
- Erioderma mollissimum
- Leptogium byssinum: Possibly extirpated in Canada
- Leptogium corticola
- Leptogium rivulare: Possibly extirpated in Canada
- Parmelinopsis minarum
- Punctelia borreri
Less risk edit
- Agrestia hispida
- Anaptychia ulotrichoides
- Cladina subtenuis
- Coccocarpia palmicola
- Dermatocarpon moulinsii
- Heterodermia obscurata
- Hypotrachyna imbricatula
- Koerberia sonomensis
- Leptogium azureum
- Ochrolechia yasudae
- Parmotrema mellissii
- Stereocaulon tennesseense
Removed from rare list edit
- Cladonia subcervicornis: Reports in North America were misidentifications, found in Greenland.
- Phaeophyscia imbricata: synonymous with Phaeophyscia hispidula, which is not rare.
References edit
- ^ Status Categories as defined by COSEWIC
- ^ COSEWIC documentation on Erioderma mollissimum:
- Species profile
- No Status Report
- No Recovery Strategy
- ^ COSEWIC documentation on Erioderma pedicellatum (Atlantic population):
- ^ COSEWIC documentation on Heterodermia sitchensis:
- ^ COSEWIC documentation on Physconia subpallida:
- Species profile
- No Status Report
- No Recovery Strategy
- ^ COSEWIC documentation on Leptogium rivulare:
- Species profile
- Status Report
- No Recovery Strategy
- ^ COSEWIC documentation on Erioderma pedicellatum (boreal population)
- Species profile
- Status Report
- No Recovery Plan
- ^ COSEWIC documentation on Hypogymnia heterophylla:
- Species profile
- Status Report
- No Recovery Plan
- ^ COSEWIC documentation on Nephroma occultum:
- Species profile
- Status Report
- No Recovery Plan
- ^ COSEWIC documentation on Pseudevernia cladonia:
- Species profile
- Status Report
- No Recovery Plan
- ^ COSEWIC documentation on Pseudocyphellaria rainierensis:
- Species profile
- Status Report in progress
- No Recovery Plan
- ^ COSEWIC documentation on Sclerophora peronella (Nova Scotia population):
- Species profile
- Status Report
- No Recovery Plan
- ^ COSEWIC documentation on Chaenotheca servitii:
- ^ COSEWIC documentation on Phaeocalicium minutissimum:
- ^ a b c d e COSEWIC Status Reports in preparation
- ^ a b c d e Candidates for Assessment by COSEWIC
- ^ Goward, T, IM Brodo, SR Clayden. 1998. Rare lichens of Canada: A review and provisional listing. Committee on the Status of Endangered Wildlife in Canada. Ottawa. 74 pp.
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