''Sclerococcum serusiauxii'' is a species of

lichenicolous fungus A lichenicolous fungus is a parasitic fungus that only lives on lichen as the host. A lichenicolous fungus is not the same as the fungus that is the component of the lichen, which is known as a lichenized fungus. They are most commonly specific to ...

in the family

Dactylosporaceae The Dactylosporaceae or Sclerococcaceae are a family of lichen-forming fungi in the class Eurotiomycetes. It is the only family of the order Sclerococcales and subclass Sclerococcomycetidae. Taxonomy There are currently seven genera in the fami ...

. It was described as a new species in 1993 by Montserrat Boqueras and Paul Diederich. The type was collected in

Col de la Pierre St Martin Col de la Pierre Saint-Martin (elevation ) is a mountain pass on the France-Spain border in the western Pyrenees in the department of Pyrénées-Atlantiques (France) and Navarra (Spain). The climb from the Spanish side was used in the 2007 Tour ...

(Spanish

Pyrenees The Pyrenees (; es, Pirineos ; french: Pyrénées ; ca, Pirineu ; eu, Pirinioak ; oc, Pirenèus ; an, Pirineus) is a mountain range straddling the border of France and Spain. It extends nearly from its union with the Cantabrian Mountains to ...

Navarre Navarre (; es, Navarra ; eu, Nafarroa ), officially the Chartered Community of Navarre ( es, Comunidad Foral de Navarra, links=no ; eu, Nafarroako Foru Komunitatea, links=no ), is a foral autonomous community and province in northern Spain, ...

), at an altitude of . Here, the fungus was growing on the lichen '' Parmelina pastillifera'', which itself was growing on ''

Pinus uncinata ''Pinus mugo'', known as bog pine, creeping pine, dwarf mountain pine, mugo pine, mountain pine, scrub mountain pine, or Swiss mountain pine, is a species of conifer, native to high elevation habitats from southwestern to Central Europe and Sou ...

''. The

specific epithet In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

honours Belgian lichenologist Emmanuël Sérusiaux, who collected the type specimen in 1989. ''S. serusiauxii'' has also been recorded from Montenegro. In addition to ''Parmelina pastillifer'', it has also been recorded on '' Parmelina tiliacea''. The fungus forms convex dark brown to black sporodochia that typically measure 60–180 by 60–100

μm The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Unit ...

. The

mycelia Mycelium (plural mycelia) is a root-like structure of a fungus consisting of a mass of branching, thread-like hyphae. Fungal colonies composed of mycelium are found in and on soil and many other substrates. A typical single spore germinates in ...

of the fungus is embedded in the

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 ...

of the

host A host is a person responsible for guests at an event or for providing hospitality during it. Host may also refer to: Places * Host, Pennsylvania, a village in Berks County People *Jim Host (born 1937), American businessman * Michel Host ...

. The presence of the fungus does not cause damage to the host lichen.

References

Lecanorales Fungi described in 1993 Fungi of Europe Lichenicolous fungi Taxa named by Paul Diederich Fungus species {{Lecanorales-stub