Dibaeis baeomyces
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Pertusariales
Family: Icmadophilaceae
Genus: Dibaeis
Species:
D. baeomyces
Binomial name
Dibaeis baeomyces
(L.f.) Rambold & Hertel (1993)[1]
Synonyms
  • Baeomyces fungoides[2]
  • Baeomyces roseus Pers. (1794)[1][2]
  • Lichen baeomyces L.f. (1782)[1]

Dibaeis baeomyces, commonly known as pink earth lichen,[2] is a fruticose lichen belonging to the family Icmadophilaceae.[3]

Taxonomy

Carl Linnaeus the Younger described the pink earth lichen in his 1782 work Supplementum Plantarum as Lichen baeomyces.[4]

The genus Dibaeis was previously considered a synonym of genus Baeomyces, until genetic testing established that the genera were separate and not even especially closely related.[5][6] D. baeomyces was one of the species which had its rDNA sequenced by both the 1997 study by Stenroos and DePriest published in the American Journal of Botany,[5] and the 1999 study by Platt and Spatafora published in The Lichenologist,[6] which both established the genera as genetically and morphologically distinct. D. baeomyces was, however, found to belong to a clade that also includes Siphula ceratites and Thamnolia vermicularis.[5] Baeomyces rufus, in particular, was noted as having been determined to be phylogenetically distant from D. baeomyces by Stenroos's and DePriest's analysis of genetic data.[5] A subsequent study by Platt and Spatafora, published in the journal Mycologia in 2000, used further DNA sequencing assays to establish that "Baeomycetaceae [to which B. rufus belongs] is a distinct taxon from the Icmadophilaceae [to which D. baeomyces belongs] and the two families represent independent lichenization events."[7]

Description

D. baeomyces is characterized by bulbous pink apothecia, 1–4 mm in diameter, atop stalks no taller than 6 mm.[2] The thallus may be grey or white, and may have a pinkish tinge.[3]

Similar species

D. baeomyces is related to Icmadophila ericetorum, the candy lichen, and the two species superficially resemble one another.[2] Its appearance is also superficially similar to some Cladonia species, particularly Cladonia cristatella (common name British soldiers), which has red tips rather than pink;[8] and to multiple Baeomyces species, which typically have brown tips.[2] B. rufus, as mentioned above, has pinkish bulbs atop its stalks, like D. baeomyces, but like other Baeomyces species it has been established as not being closely related to D. baeomyces.[5]

Distribution and habitat

This lichen is found throughout eastern North America, from Alabama and Georgia in the south to the Arctic Circle in the north. While rare there, it does occur in both Alaska and the Northwest Territories.[3] It prefers to grow directly on unstable soils such as loose sand or dry clay, and in full sun.[2] It also prefers acid soils to neutral or alkaline.[1] On disturbed ground, a preferred habitat type, it is able to spread quickly for a lichen.[2]

References

  1. 1 2 3 4 Feige, Guido B.; Lumbsch, H. T. (1993). Phytochemistry and Chemotaxonomy of Lichenized Ascomycetes: A Festschrift in Honour of Siegfried Huneck. Science Publishers. pp. 224, 231. ISBN 978-3443580322. Retrieved 9 October 2015.
  2. 1 2 3 4 5 6 7 8 Brodo, Irwin M.; Duran Sharnoff, Sylvia; Sharnoff, Stephen (2001). Lichens of North America. Yale University Press. pp. 50, 55, 173–4, 299–300, 360. ISBN 978-0300082494. Retrieved 9 October 2015.
  3. 1 2 3 "CNALH — Dibaeis baeomyces". LichenPortal.org. Consortium of North American Lichen Herbaria. Retrieved 9 October 2015.
  4. ↑ Carolus Linnaeus the Younger (1782). Supplementum Plantarum. Brunsvigae: Orphanotrophei. p. 450.
  5. 1 2 3 4 5 Stenroos, Soili K.; DePriest, Paula T. (November 1998). "SSU rDNA phylogeny of cladoniiform lichens". American Journal of Botany. 85 (11): 1548–1559. doi:10.2307/2446481. JSTOR 2446481. PMID 21680313.
  6. 1 2 Platt, Jamie L.; Spatafora, Joseph W. (September 1999). "A Re-Examination of Generic Concepts of Baeomycetoid Lichens Based on Phylogenetic Analyses of Nuclear ssu and Lsu Ribosomal DNA". The Lichenologist. 31 (5): 409–418. doi:10.1017/S0024282999000572. Retrieved 9 October 2015.
  7. ↑ Platt, Jamie L.; Spatafora, Joseph W. (May 2000). "Evolutionary Relationships of Nonsexual Lichenized Fungi: Molecular Phylogenetic Hypotheses for the Genera Siphula and Thamnolia from SSU and LSU rDNA". Mycologia. Mycological Society of America. 92 (3): 475–487. doi:10.2307/3761506. JSTOR 3761506.
  8. ↑ "Dibaeis baeomyces". ConnecticutWilderness.com. Retrieved 9 October 2015.
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