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arctomia lichen

Scientific Name: Arctomia

Family: Arctomiaceae

Category: Lichen

Growth:

Duration:

Other Names:

       

Arctomia Lichen

The genus Arctomia encompasses lichenized fungi belonging to the family Arctomiaceae. Several species and related taxa are mentioned, each with unique characteristics and distributions.

Taxonomy and Nomenclature:

  • Genus: Arctomia
  • Family: Arctomiaceae
  • Kingdom: Fungi
  • Synonyms/Related Names:
    • Lichen fascicularis L.
    • Collema fasciculare (L.) Weber ex F.H.Wigg. (Note: some literature suggests certain Collema species should be placed within Arctomia.)

Species Highlights:

  • Arctomia borbonica sp. nov.: A newly described species from Reunion, in the Mascarene archipelago.
  • Arctomia delicatula Th. Fr.:
    • Common Name(s): Delicate Arctomia Lichen
    • Taxon Version Key: NBNSYS0000018177
    • French Common Name: arctomie délicate
  • Arctomia teretiuscula sp. nov.: A minutely coralloid, bryophilous cyanolichen.
  • Arctomia fascicularis (L.) Otlora &amp Wedin (2013): Formerly known as Lichen fascicularis L.
  • Arctomia latispora
  • Arctomia interfixa: A related species found in Iceland.

Distribution and Habitat:

  • Arctomia borbonica is found in montane natural and secondary habitats in Reunion, in the Mascarene archipelago.
  • Arctomia teretiuscula shows a biogeographical link between the lichen biotas of the Himalayan region and the Arctic.
  • Arctomia delicatula has been observed in British Columbia (Fraser Plateau, Robson Valley) on the bark of dead Populus trees in antique boreal forests.

Morphological Characteristics:

  • Arctomia delicatula has a thallus that is crustose-gelatinous to coarsely granular, dispersed or in a crustose mass, rust-brown to rarely olive, with lobes less than 0.2 mm broad and a well-defined cortex.

Ecological Role:

  • Several Arctomia species, including Arctomia delicatula, are identified as Species of Concern by the Montana Natural Heritage Program.

Interactions with Other Organisms:

  • Arctomia teretiuscula is described as bryophilous, meaning it grows on mosses.

Resources:

  • Biodiversity Library: http://www.biodiversitylibrary.org/part/100491
  • Natural History Museum Publication: The Lichen Flora of Great Britain and Ireland.