Anders Nordin

Aspicilia cyanescens (bluish sunken disk lichen) is a rough surfaced, bluish-tinged pale gray rimose to areolate crustose lichen, endemic to California. It mostly grows on rock. It is unique among California members of its genus in that it can sometimes be found on growing on bark or wood, especially incense cedar and sometimes on white fir or giant sequoias in the central Sierra Nevada range and southern California mountains. It has a black or bluish or greenish prothallus. The prothallus is usually absent when growing on rock. Each areole commonly has 1–7 roundish to angular apothecia that

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Aspicilia pacifica (pacific sunken disk lichen) is a white to grayish, brownish, or ocher crustose areolate lichen that commonly grows on siliceous rock or basalt along the seashore and in higher coastal mountains of California and Baja California. It has numerous small (0.1–.8 mm), round to angular apothecia toward the middle of the thallus, with concave to flat black discs that are sometimes lightened with white pruina. Lichen spot test on the cortex and medulla are I−, K+ yellow to red, P+ orange, and C−. Secondary metabolites include much stictic acid, and some norstictic acid.

Aspicilia cuprea, the copper sunken disk lichen, is a large 1–20-centimeter (0.4–7.9 in) diameter copperish-tan to brown crustose areolate lichen that forms large patches of adjacent lichens on rock (saxicolous). It grows only from northern California to Baja California. It is common and characteristic of siliceous rock in interior valley and western mountains of California. One to many irregularly shaped black apothecia are sunken into the thallus. Lichen spot tests are K+ red, C−, P+ orange, and I−.

Aspicilia confusa is a pale gray (sometimes brownish) crustose areolate lichen that grows mostly on rock in southern and central California mountains, from 250 to 3,170 metres (820 to 10,400 ft). Areoles may be contiguous or dispersed. It has a dark, fringed prothallus. Each areole commonly has 1–4 round to angular aspicilioid apothecia that are 0.1–1.5 mm in diameter, sunken into it. Each apothecia has a usually concave, black disc. Lichen spot tests are all negative. It grows on rock in chaparral or forests in central and southern California, including the Sierra Nevadas, but not in the

Tetramelas pulverulentus is a species of lichenicolous (lichen-dwelling) fungus in the family Caliciaceae. Originally described from Italy in 1860, this inconspicuous fungus lives hidden within the white inner tissue (medulla) of its host lichen rather than forming a visible crust on the surface. It produces tiny black fruiting bodies that contain brown ascospores and is distinguished from related species by having spores divided into three compartments (septa).

Tetramelas phaeophysciae is a species of lichen-forming fungus in the family Caliciaceae. It is a lichenicolous (lichen-dwelling) species that grows on other lichens, primarily Phaeophyscia and Physcia species on rocks. Found in arctic to subalpine climates, records are documented from Scandinavia, Greenland, Iceland, and parts of central and northern Asia. The species was described in 2005 after DNA evidence showed it was distinct from the closely related Tetramelas pulverulentus.

Aspicilia phaea (dusky sunken disk lichen) is a grayish brown to tan areolate crustose lichen commonly found on rock in coastal to inland parts of central and southern California. Described as new to science in 2007, it is endemic to (only found in) California. It grows on exposed or partially shaded siliceous rock, with a few known occurrences on serpentine rock. In rare cases full areolas do not form, and it appears as being cracked (rimose). There are often grayish or whitish spots on the areolas. The thallus is 2–8 cm in diameter, and 0.1– 1.2 mm thick. The areolas are irregularly sized

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Circinaria calcarea is a species of crustose lichen in the family Megasporaceae. It was first described as a new species by Carl Linnaeus in his 1753 work Species Plantarum. Linnaeus named it Lichen calcareus, as he classified all lichens in the eponymously named genus. The species has had an extensive taxonomic history, resulting in dozens of synonyms. In 2010, it was placed in its current genus, Circinaria, following molecular phylogenetic analysis of the Megasporaceae. Circinaria calcarea has a cosmopolitan distribution, having been recorded from the Arctic, Asia, Australasia, Europe,

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Tetramelas confusus is a species of crustose lichen in the family Caliciaceae. Found in the South Island of New Zealand, it was formally described as a new species in 2002 by Anders Nordin. The lichen is only known to occur in the Central Otago mountains, where it grows in alpine grasslands on dead grass, plant detritus, and old rabbit droppings. It has a thin, creamy-white to greyish-white thallus that spreads irregularly. Secondary chemicals found in the lichen include 6-O-methylarthothelin (major) and atranorin (minor). Similar species include T. papillatus, T. insignis, and T.

Megaspora rimisorediata is a species of crustose lichen in the family Megasporaceae. Found in Iran, it was described as a new species in 2011. It is distinguished by its distinctive network of dark blue-green powdery granules that develop along cracks in the lichen's surface, which gives the species its name meaning 'crack-sorediate'. The lichen grows primarily on oak bark in mountainous steppe regions across northern Iran, where it appears to grow better during wetter winter months than in summer.

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Circinaria caesiocinerea is a species of crustose lichen belonging to the family Megasporaceae. It was first described as Lecanora caesiocinerea in 1869 by William Nylander, but was transferred to the genus Circinaria in 2010 by Anders Nordin, Sanja Savić, and Leif Tibell.