Misplaced Pages

Thelomma santessonii
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Caliciales
Family:	Caliciaceae
Genus:	Thelomma
Species:	T. santessonii
Binomial name
Thelomma santessonii Tibell (1976)

Thelomma santessonii, the tan nipple lichen, is a species of saxicolous (rock-dwelling), crustose lichen in the family Caliciaceae. Found in northern North America, it was formally described as a new species in 1976 by lichenologist Leif Tibell. It is endemic to the coast and islands of Southern California and Baja California in Mexico.

Thelomma santessonii has a yellowish tan color, and is areolate. The thallus has verrucae that measure up to 2.5 mm (0.10 in) broad. The expected results of chemical spot tests are KC− on the thallus, and K+ (red), P+ (yellow) on the mazaedia. When a long-wavelength UV light is lit on the thallus, it fluoresces a blue-white color. The ascospores of the lichen are spherical and lack any septa; they measure 14–16 μm.

Endococcus thelommatis is a lichenicolous fungus that parasitizes Thelomma santessonii.

References

1. ^ Sharnoff, Stephen (2014). A Field Guide to California Lichens. New Haven/London: Yale University Press. p. 357. ISBN 978-0-300-19500-2.
2. Tibell, L. (1976). "The genus Thelomma". Botaniska Notiser. 129: 221–249.
3. ^ Kocourková, Jana; Knudsen, Kerry (2011). "Endococcus thelommatis, a new lichenicolous fungus from Southern California". Bibliotheca Lichenologica. 106: 173–178.

This Caliciales-related article is a stub. You can help Misplaced Pages by expanding it.

• v
• t
• e

• Caliciales
• Lichen species
• Lichens described in 1976
• Lichens of the Southwestern United States
• Lichens of Mexico
• Taxa named by Leif Tibell
• Caliciales stubs