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dot lichen
Scientific Name: Arthonia xylographica
Family: Arthoniaceae
Category: Lichen
Growth: Lichenous
Duration:
Other Names:
Dot Lichen
Dot lichen is a common name applied to lichens in the genera Arthonia and Micarea. "Dotted lichens" may refer to lichens in the genus Bacidia.
Taxonomy and Nomenclature
- Group: Lichen
- Family: Arthoniaceae (for Arthonia and related species like ARGL17) or Icmadophilaceae (for Dibaeis absoluta). Micarea belongs to Micareaceae.
- Kingdom: Fungi
- Examples of species and their common names:
- Arthonia arthonioides - Dot Lichen
- Arthonia asteriscus - Dot Lichen
- Dibaeis absoluta - Pink Dot Lichen
- Micarea erratica - Erratic Dot Lichen
- Scoliciosporum chlorococcum (Synonym: Bacidia chlorococca) - City Dot Lichen
Distribution and Habitat
- Found in various locations, including the New Orleans area and Mount Rainier National Park.
- Observed on substrates like rocks (e.g., Protoblastenia rupestris - Orange Dot Lichen) and tree bark (e.g., Arthonia rubella - Dot Lichen on Palm tree bark).
- Leptorhaphis epidermidis and Leptorhaphis atomaria are Birchbark Dot Lichens.
Morphological Characteristics
- Some Dot Lichens (e.g., Mycobilimbia pilularis) are crustose lichens with a grayish-green thallus.
- Mycobilimbia pilularis has yellowy-brown biatorine, convex apothecia (fruiting bodies).
- Dibaeis absoluta (Pink Dot Lichen) has pink apothecia born on very short (ca. 1 mm) stalks.
Interactions with Other Organisms
- Observed growing on palm tree bark.
Further Information
- Catalogue of Life: 2012 Annual Checklist
- Encyclopedia of Life
- USDA Plants Database
- Smithsonian Institution, National Museum of Natural History, Department of Botany
- ResearchGate (for Conservation Assessment reports)