''Astrochapsa'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

lichen A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.fungi A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from ...

in the subfamily Graphidoideae of the family

Graphidaceae The Graphidaceae are a family of lichens in the order Ostropales. Distribution and ecology The vast majority of Graphidaceae species are restricted to the tropics. Most Graphidaceae species are epiphytic (i.e. they grow only on plants). Gener ...

. It has 28 species. The genus was

circumscribed In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius. Not every polyg ...

by Sittiporn Parnmen,

Robert Lücking Robert Lücking (born 1964) is a German lichenologist. He is a leading expert on foliicolous lichens–lichens that live on leaves. Life and career Born in Ulm in 1964, Lücking earned both his master's (1990) and PhD degree (1994) at the Univ ...

, and H. Thorsten Lumbsch in 2012, with '' Astrochapsa astroidea'' assigned as the

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ...

. It was segregated from the genus '' Chapsa'', from which it differs in having a more frequently densely corticate

thallus Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms wer ...

, an apothecial margin that is mostly recurved, and the almost exclusively subdistoseptate (with slightly thickened

septa The Southeastern Pennsylvania Transportation Authority (SEPTA) is a regional public transportation authority that operates bus, rapid transit, commuter rail, light rail, and electric trolleybus services for nearly 4 million people in five coun ...

and angular

lumina Lumina may refer to: Arts, entertainment, and media Literature * ''Lumina'', a literary journal published by Sarah Lawrence College * ''World of Lumina'' or ''Lumina'', a graphic novel by Emanuele Tenderini and Linda Cavallini Music * "Lumina", ...

), non-

amyloid Amyloids are aggregates of proteins characterised by a Fibril, fibrillar morphology of 7–13 Nanometer, nm in diameter, a beta sheet (β-sheet) Secondary structure of proteins, secondary structure (known as cross-β) and ability to be Staining, ...

ascospore An ascus (; ) is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually contains eight ascospores (or octad), produced by meiosis followed, in most species, by a mitotic cell division. However, asci in some genera or s ...

Species

*'' Astrochapsa albella'' *'' Astrochapsa alstrupii'' *'' Astrochapsa amazonica'' *'' Astrochapsa astroidea'' *'' Astrochapsa calathiformis'' *'' Astrochapsa columnaris'' *'' Astrochapsa elongata'' *'' Astrochapsa fusca'' *'' Astrochapsa graphidioides'' *'' Astrochapsa kalbii'' *'' Astrochapsa lassae'' *'' Astrochapsa lobata'' *'' Astrochapsa magnifica'' *'' Astrochapsa martinicensis'' *'' Astrochapsa mastersonii'' *'' Astrochapsa megaphlyctidioides'' *'' Astrochapsa meridensis'' *'' Astrochapsa mirabilis'' *'' Astrochapsa platycarpella'' *'' Astrochapsa pseudophlyctis'' *'' Astrochapsa pulvereodiscus'' *'' Astrochapsa recurva'' *'' Astrochapsa sipmanii'' *'' Astrochapsa stellata'' *'' Astrochapsa submuralis'' *'' Astrochapsa verruculosa'' *'' Astrochapsa waasii'' *'' Astrochapsa wolseleyana'' *'' Astrochapsa zahlbruckneri''

References

Graphidaceae Lichen genera Taxa described in 2012 Ostropales genera Taxa named by Helge Thorsten Lumbsch Taxa named by Robert Lücking {{Ostropales-stub