Punctelia missouriensis

Punctelia missouriensis, commonly known as the mealy speckled shield lichen, is a species of foliose lichen in the family Parmeliaceae. It is found in the southeastern United States, where it grows on tree bark and on rocks.

Punctelia missouriensis
in Eldersburg, Maryland
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Lecanorales
Family: Parmeliaceae
Genus: Punctelia
Species:
P. missouriensis
Binomial name
Punctelia missouriensis
G.Wilh. & Ladd (1992)

Taxonomy

edit

It was formally described as a new species in 1992 by Gerould Wilhelm and Douglas Ladd. The type specimen was collected by the authors in Crawford County, Missouri, in Onondaga Cave State Park. The specimen was found growing on a Juniperus virginiana in the Vilander Bluff Natural Area.[1] Mónica Adler interpreted the soredia of this species as tiny isidia, and proposed to synonymise the taxon with the South American species Punctelia punctata,[2] but other authorities considered it to have sufficient morphological differences to warrant distinction as an independent species.[3] It is colloquially known as the mealy speckled shield lichen.[4]

Habitat and distribution

edit

Punctelia missouriensis is found in the southeastern United States.[3] It occurs in the tallgrass prairie biome in the U.S. Interior Highlands. Here it occurs regularly on the trunks of oak trees in open prairie and open savanna. It also occurs on siliceous rock faces with partial shade.[1] Although it was reported to occur in South America,[2] the specimens that were analyzed were actually of Punctelia punctata.[3]

References

edit
  1. ^ a b Wilhelm, Gerould; Ladd, Douglas (1992). "A new species of the lichen genus Punctelia from the Midwestern United States". Mycotaxon. 44 (2): 495–504.
  2. ^ a b Adler, Mónica T. (1997). "Polymorphism of vegetative propagules in Punctelia punctilla (Parmeliaceae, Lecanorales), and the delimitation of the species". Mycotaxon. 63: 57–70.
  3. ^ a b c Aptroot, André (2003). "A new perspective on the sorediate Punctelia (Parmeliaceae) species of North America". The Bryologist. 106 (2): 317–319. doi:10.1639/0007-2745(2003)106[0317:ANPOTS]2.0.CO;2.
  4. ^ Hinds, James W.; Hinds, Patricia L. (2007). The Macrolichens of New England. Memoirs of the New York Botanical Garden. Vol. 96. pp. 429–430. ISBN 978-0-89327-477-1.