Bright Cobblestone Lichen

(Acarospora socialis)

               
Conservation Status

IUCN Red List

not yet assessed

Bright Cobblestone Lichen

NatureServe

GNR - Unranked

Minnesota

not listed

Occurrence

Very common in southwestern United States, uncommon in Minnesota

Substrate

On sandstone and on granite rocks or outcrops; rarely on soil

Growth Form

Crusticose

Chemistry

 


Identification

The vegetative body (thallus) is up to 4 wide and somewhat variable in form (squamulose). It may be crusty (crusticose), in such close contact with the rock surface (substrate) that it appears sprayed on like paint; more or less leaf-like (foliose), with thin, flat, lobes that are free from the substrate; or cracked (areolate), broken up into pieces (areoles), appearing somewhat like cracked paint, that can be individually removed from the substrate. The areoles may be round or somewhat polygonal, and may form lobes. The upper surface of the thallus is usually bright yellow or greenish-yellow when fresh but may be bleached white with age.

The spore-producing body (apothecia) are tiny, about 1 32 (1 mm) in diameter, and have reddish-brown, concave disks.

 
Similar
Species

 


Distribution Distribution Map  

Sources: 4, 7, 29.


Comments

Uncommon
Bright Cobblestone Lichen is very common in southwestern United States. It is the most common yellow member of its genus in the southwest, and one of the most common lichens of any kind in the deserts of Arizona and southern California. It is uncommon in Minnesota, where it has been recorded only in Cottonwood County.


Taxonomy

Division:

Ascomycota (sac fungi)

 

No Rank:

saccharomyceta

 

Subdivision:

Pezizomycotina

 

No Rank:

leotiomyceta

 

Class:

Lecanoromycetes

 

Subclass:

Acarosporomycetidae

 

Order:

Acarosporales

 

Family:

Acarosporaceae

 
Synonyms

 

 
Common
Names

Bright Cobblestone Lichen

Cracked Lichen


 

 

 

 

 

 

Glossary

apothecia

An open, disk-shaped or cup-shaped, reproductive structure, with spore sacs on the upper surface, that produces spores for the fungal partner of a lichen.

 

areole

On plants: A woolly, hairy, or cushion-like structure, unique to cacti, from which arise spines or glochids. On lichens: a small, irregular patch of thallus.

 

crusticose

Crusty; referring to lichens in such close contact with the rock surface (substrate) that it appears sprayed on like paint.

 

foliose

Leaf-like; referring to lichens with thin, flat, leaf-like growths divided into lobes which are free from the substrate.

 

substrate

The surface on which a lichen grows.

 

thallus

The vegetative body of a lichen composed of both the alga and the fungus.

       

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Published on Jan 23, 2015

Acarospora socialis - fungi kingdom

 
     
  Acarospora socialis Top #10 Facts
Rishika Janaki
 
   
 
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Published on Jan 31, 2016

 
     

 

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