''Phoma candelariellae'' is a species of

lichenicolous 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 ...

(

lichen A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.fungus 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 th ...

in the family

Didymellaceae The Didymellaceae are a family of fungi in the order Pleosporales. The have a world-wide distribution. Recent phylogenetic examination of some of the larger genera of the Pleosporales, particularly ''Phoma'', has led to considerable reorganisat ...

. It is found in the

Central Anatolia Region The Central Anatolia Region ( tr, İç Anadolu Bölgesi) is a geographical region of Turkey. The largest city in the region is Ankara. Other big cities are Konya, Kayseri, Eskişehir, Sivas, and Aksaray. Located in Central Turkey, it is bordered ...

of Turkey and in Ukraine, where it grows parasitically on the

apothecia An ascocarp, or ascoma (), 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. Ascocarps are mo ...

(fruiting structures) of the

saxicolous A saxicolous lichen is a lichen that grows on rock. The prefix "sax" from the Latin means "rock" or "stone". Characteristics Saxicolous lichens exhibit very slow growth rates. They may develop on rock substrates for long periods of time, give ...

(rock-dwelling) lichen ''

Candelariella aurella ''Candelariella aurella'', the hidden goldspeck lichen or eggyolk lichen, is a yellow crustose lichen in the family Candelariaceae. It is commonly found on calcareous rock or wood or bark exposed to sunlight and which may have calcareous dust in ...

''.

Taxonomy

The fungus was formally described as a new species in 2016 by Zekiye Kocakaya and Mehmet Gökhan Halıcı. The

type specimen In biology, a type is a particular wiktionary:en:specimen, specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to a ...

was collected northwest of

Sivrihisar Sivrihisar ( tr, Sivrihisar, "a pointed castle") is a town and district of Eskişehir Province in the Central Anatolia Region of Turkey. According to 2010 census, population of the district is 23 488 of which 9,817 live in the town of Sivrihisar. ...

(

Eskişehir Eskişehir ( , ; from "old" and "city") is a city in northwestern Turkey and the capital of the Eskişehir Province. The urban population of the city is 898,369 with a metropolitan population of 797,708. The city is located on the banks of the ...

) at an altitude of , where it was found growing on the

of the

saxicolous lichen A saxicolous lichen is a lichen that grows on rock. The prefix "sax" from the Latin means "rock" or "stone". Characteristics Saxicolous lichens exhibit very slow growth rates. They may develop on rock substrates for long periods of time, give ...

'', which itself was growing on

calcareous Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines. In zoology ''Calcareous'' is used as an adje ...

rocks. ''Phoma candelariellae'' is the only member of ''

Phoma ''Phoma'' is a genus of common coelomycetous soil fungi. It contains many plant pathogenic species. Description Spores are colorless and unicellular. The pycnidia are black and depressed in the tissues of the host. ''Phoma'' is arbitrarily lim ...

'' that grows on lichen genus '' Candelariella''. David Hawksworth and colleagues later expressed doubt about the placement of the

taxon In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular nam ...

in genus ''

'', suggesting that a transfer may be necessary, "as the species does not appear to be

congeneric Congener may refer to: * A thing or person of the same kind as another, or of the same group. * Congener (biology), organisms within the same genus. * Congener (chemistry), related chemicals, e.g., elements in the same group of the periodic table. ...

with 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 ...

of the genus".

Description

The

conidiomata Conidiomata (singular: Conidioma) are blister-like fruiting structures produced by a specific type of fungus called a coelomycete. They are formed as a means of dispersing asexual spores call conidia, which they accomplish by creating the blister-l ...

of ''Phoma candelariellae'' are in the form of

pycnidia A pycnidium (plural pycnidia) is an asexual fruiting body produced by mitosporic fungi, for instance in the order Sphaeropsidales ( Deuteromycota, Coelomycetes) or order Pleosporales (Ascomycota, Dothideomycetes). It is often spherical or inve ...

—spherical to pear-shaped reproductive structures, that begin more or less immersed in the host tissue, but later burst partially through the surface. These black spots are covered by a clear gelatinous sheath; their dimensions are typically in the range 98.5−117 by 74−103 μm. A 12 μm-diameter

ostiole An ''ostiole'' is a small hole or opening through which algae or fungi release their mature spores. The word is a diminutive of "ostium", "opening". The term is also used in higher plants, for example to denote the opening of the involuted ...

provides an opening for the release of abundant

conidia A conidium ( ; ), sometimes termed an asexual chlamydospore or chlamydoconidium (), is an asexual, non-motile spore of a fungus. The word ''conidium'' comes from the Ancient Greek word for dust, ('). They are also called mitospores due to the ...

, which themselves are more or less spherical with a smooth wall and a gelatinous sheath, contain a single internal oil droplet, and measure about 5 μm across.

Habitat and distribution

The only known

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 ...

of ''Phoma candelariellae'' is ''Candelariella aurella''. Infection by the fungus is pathogenic, causing discolouration (blackening) of the host tissue, and diminishing and ultimately destroing the

hymenium The hymenium is the tissue layer on the hymenophore of a fungal fruiting body where the cells develop into basidia or asci, which produce spores. In some species all of the cells of the hymenium develop into basidia or asci, while in others some ...

of the infected apothecia. At the time of its original publication, ''Phoma candelariellae'' had been documented from only two localities in the Central Anatolia Region of Turkey. The authors suggested that the fungus likely has a wider distribution, as the host is widely distributed in the Northern Hemisphere. This was confirmed when it was reported from the

Zhytomyr Zhytomyr ( uk, Жито́мир, translit=Zhytomyr ; russian: Жито́мир, Zhitomir ; pl, Żytomierz ; yi, זשיטאָמיר, Zhitomir; german: Schytomyr ) is a city in the north of the western half of Ukraine. It is the Capital city, a ...

Kherson Kherson (, ) is a port city of Ukraine Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers appr ...

, and

Mykolaiv Mykolaiv ( uk, Миколаїв, ) is a List of cities in Ukraine, city and List of hromadas of Ukraine, municipality in Southern Ukraine, the Administrative centre, administrative center of the Mykolaiv Oblast. Mykolaiv city, which provides U ...

regions of Ukraine.

References

{{Taxonbar, from=Q108186719 candelariellae Fungi described in 2016 Lichenicolous fungi Fungi of Europe