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dot lichen

Scientific Name: Arthonia sexlocularis

Family: Arthoniaceae

Category: Lichen

Growth: Lichenous

Duration:

Other Names:

       

Dot Lichen

The term "Dot Lichen" is a common name applied to lichens belonging to either the genus Arthonia or the genus Micarea. "Dotted lichens" may refer to lichens in the genus Bacidia.

Nomenclature and Taxonomy

  • Group: Lichen
  • Family: Arthoniaceae (for Arthonia and related lichens), Icmadophilaceae (for Dibaeis absoluta), Micareaceae (for Micarea erratica)
  • Kingdom: Fungi

Some identified species and related information include:

  • Arthonia arthonioides - Dot Lichen
  • Arthonia asteriscus - Dot Lichen
  • Dibaeis absoluta (Pink Dot Lichen)
  • Leptorhaphis epidermidis (Birchbark Dot Lichen)
  • Leptorhaphis atomaria (Birchbark Dot Lichen)
  • Micarea globulosella (Globe Dot Lichen)
  • Mycobilimbia pilularis ('Dot Lichen')
  • Scoliciosporum chlorococcum (City Dot Lichen). Synonyms: Bacidia chlorococca
  • Micarea erratica (Erratic Dot Lichen)
  • Arthonia exilis
  • Arthonia dispersa (dispersed dot lichen)
  • Arthonia tuckermaniana (Tuckerman's dot lichen)
  • Micarea nitschkeana (Nitschke's dot lichen)
  • Arthonia glebosa (dot lichen)

Distribution and Habitat

  • Arguably, the most abundant lichen in the New Orleans area.
  • Found growing on rocks in Mt. Rainier National Park.
  • Arthonia rubella found on palm tree bark in Bahia Honda Key, Florida, USA.

Morphological Characteristics

  • Mycobilimbia pilularis has a grayish green crustose thallus and yellowy brown biatorine, convex apothecia.
  • Dibaeis absoluta has pink apothecia born on very short (ca. 1 mm) stalks.

Quirky Facts

  • There is a fabric design named "Kaffe Fassett Perennials Spot Dot Lichen."
  • Someone wrote "I'm lichen it!" in an article about eating oak moss.

Resources and Further Information

  • Encyclopedia of Life
  • Catalogue of Life
  • USDA
  • Smithsonian Institution, National Museum of Natural History, Department of Botany
  • ResearchGate