''Haematomma'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

crustose lichen Crustose lichens are lichens that form a crust which strongly adheres to the Substrate (biology), substrate (soil, rock, tree bark, etc.), making separation from the substrate impossible without destruction. The basic structure of crustose lichen ...

s established by

Abramo Bartolommeo Massalongo Abramo Bartolommeo Massalongo (13 May 1824 – 25 May 1860) was an Italian paleobotanist and lichenologist. He was born in Tregnago in the Province of Verona and took a great interest in botany as a young man. Massalongo joined the faculty of med ...

in 1852. It is the sole genus in the Haematommataceae, a family

circumscribed In geometry, a circumscribed circle for a set of points is a circle passing through each of them. Such a circle is said to ''circumscribe'' the points or a polygon formed from them; such a polygon is said to be ''inscribed'' in the circle. * Circum ...

Josef Hafellner Josef Hafellner (1951– ) is an Austrian mycologist and lichenologist. He was awarded the Acharius Medal in 2016 for his lifetime contributions to lichenology. Before his retirement, he was a professor at the Karl-Franzens-Universität in Graz ...

in 1984. Commonly called bloodstain lichens, the species assigned to this genus are widely distributed in

tropical The tropics are the regions of Earth surrounding the equator, where the sun may shine directly overhead. This contrasts with the temperate or polar regions of Earth, where the Sun can never be directly overhead. This is because of Earth's ax ...

and

temperate In geography, the temperate climates of Earth occur in the middle latitudes (approximately 23.5° to 66.5° N/S of the Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ran ...

areas. The genus name ''Haematomma'' means "bloody eye", a reference to the color of the lichen's

apothecia An ascocarp, or ascoma (: ascomata), is the fruiting body ( sporocarp) of an ascomycete phylum fungus. It consists of very tightly interwoven hyphae and millions of embedded asci, each of which typically contains four to eight ascospores. As ...

Species

Species Fungorum ''Index Fungorum'' is an international project to index all formal names (Binomial nomenclature, scientific names) in the fungus Kingdom (biology), kingdom. As of 2015, the project is based at the Royal Botanic Gardens, Kew, one of three partn ...

accepts 22 species in the genus ''Haematomma'': *'' Haematomma accolens'' *'' Haematomma africanum'' *'' Haematomma alborussulum'' *'' Haematomma caperaticum'' *'' Haematomma collatum'' *'' Haematomma eremaeum'' *'' Haematomma fenzlianum'' *'' Haematomma flexuosum'' *'' Haematomma fluorescens'' *'' Haematomma gallowayi'' *'' Haematomma infuscum'' *'' Haematomma nicoyense'' *'' Haematomma nothofagi'' *'' Haematomma ochroleucum'' *'' Haematomma parda'' *'' Haematomma persoonii'' *'' Haematomma pluriseptatum'' *'' Haematomma puniceum'' *'' Haematomma rubidum'' *'' Haematomma rufidulum'' *'' Haematomma similis'' *'' Haematomma sorediatum'' *''

Haematomma staigeriae ''Haematomma staigeriae'' is a species of corticolous (bark-dwelling) lichen in the family Haematommataceae. Found in Costa Rica, it was formally described as a new species in 2006 by Matthew Nelsen, Robert Lücking, and Loengrin Umaña. The typ ...

'' *'' Haematomma stevensiae''

References

Lichen genera Lecanorales genera Taxa described in 1852 Taxa named by Abramo Bartolommeo Massalongo {{Lecanorales-stub