Squamarina degelii Poelt

Red list categories: Norway: , Sweden: , Finland: , EU:

By E. Timdal, - updated 11.08.1996.
[Map] Sources for map data: O (all relevant herbaria scanned)
Abbreviations, map symbols and standard references
Norwegian distribution: The species is restricted to areas with calcareous rock in southeastern Norway - Counties:: Ak-Bu. - Vegetation regions: Boreonemoral to low alpine. - Altitude: About sea-level to 1200 m

World distribution: The species is known from Norway and western North America (Alberta, Arizona, Colorado, Nevada, New Mexico, Utah)

Ecology: It grows on horizontal to steep faces of calciferous rock, often limestone, but also schists. The sites are exposed, and south- to west-facing. The most luxuriant sites are maritime rocks, but the species also occurs in inland habitats, mainly in the agricultural landscapes, as well as in low alpine screes

Threats: There are probably few threats except land development (limestone quarries, road construction, etc.)

Status: The Norwegian population is small, c. 30 localities are known. There is no indication of any increase or decrease

References:

  • Poelt,J (1958): Die lobaten Arten der Flechtengattung Lecanora Ach. sensu ampl. in der Holarktis. Mitt. der Bot. Staatssammlung Munchen 19-20: 411-589.
  • Ryan,BD (1990): A study of Lecanora valesiaca (lichenized Ascomycotina), with notes on L. dispersoareolata, L. albula, and Squamarina subg. Petroplaca in North America. Nova Hedwigia 50(1-2): 81-96.
  • Timdal,E (1983): The genus Squamarina in Scandinavia. Lichenologist 15: 169-179.

    Specimens in other herbaria, litterature, etc.

  • OPPLAND, VÅGÅ, Viste, Hänge nördlich des Hofes, UTM: NP 00-01 59, alt.: 450-480 m, Auf niedrigen Kalkschieferblöcken, meist an Schrägflächen, zerstreut, vergesellschaftet mit ..., 1976, Buschardt A. & Poelt J. (Poelt & Buschardt 1978: 131)