Melanoleuca bataillei is only known from the Mediterranean basin from a few scattered sites in Morocco, Algeria, Spain, France, Italy and Greece (Malençon & Bertault 1975, Bon 1991, Delivorias & Gonou-Zagou 2000, Fontenla et al. 2003b). It is a rare fungus, being an easily observable, sizeable and distinct species but sure overlooked, been recorded in grassy clearings and in coniferous forests in only in 16 localities.
Considering the mapping of records and the limit of 500 km, we can conclude that there are 6 severely fragmented subpopulations. Taking into account the unknown sites and according to standards (Dahlberg and Mueller 2011), could be considered to equal a maximum of 160 localities in total for this species. Assuming there are two fungal genotypes per site and the total number of localities to be fewer than 200, the estimated total number of mature individuals will not exceed 1000.
The species assessment is proposed as VULNERABLE B2(a)
Melanoleuca is found to be monophyletic genus (Vizzini et al. 2011), characterized by the production of small to large fleshy basidiocarps, convex to piano-convex pileus, light-colored gills, central stipe and hyaline, amyloid, apical spores (Bon 1978, Boekhout 1988). Although recognition of Melanoleuca is generally unproblematical, many controversies exist concerning the distinction and nomenclature of species and the interpretation of old descriptions and names. ( Bas, C. et al. ,1988). M. bataillei is identified because of its medium-sized fruiting bodies with the gray-brown pileus, the light-colored stipe, the whitish gills and the mainly lageniform cystidia. Melanoleuca oreina, which is phenetically similar, differs principally on cystidial shape. Molecularly, they are quite distinct (P%IV = 92.5). (Vizzini et al. 2011)
It is a species which currently presents Mediterranean distribution, as recorded in Morocco, Algeria, Spain, France,Italy and Greece (Malençon & Bertault 1975, Bon 1991, Delivorias & Gonou-Zagou 2000, Fontenla et al. 2003b).
Melanoleuca bataillei is only known from a few scattered sites in Morocco (3), Algeria (1), Spain (1), France (1), Italy (8) and Greece (2) (Malençon & Bertault 1975, Bon 1991, Delivorias & Gonou-Zagou 2000, Fontenla et al. 2003b). It is safe to assume that Melanoleuca bataillei is a rare fungus, being an easily observable, sizeable and distinct species , and yet has been recorded only in 16 localities.Considering the mapping of records and the limit of 500 km, we can conclude that there are 6 severely fragmented subpopulations. Taking into account the unknown sites and according to standards (Dahlberg and Mueller 2011), could be considered to equal a maximum of 160 localities in total for this species. Assuming there are two fungal genotypes per site and the total number of localities to be fewer than 200, the estimated total number of mature individuals will not exceed 1000.
Current Population Trend: Unknown
Population Trend: Uncertain
Melanoleuca bataillei is a saprtrophic fungus growing individually or in small groups scattered in humus, grasslands, coniferous and mixed woods.
It is recorded in sites ranging from 600- 1750 m altitude.
It is significantly correlated with a high level of decomposition, whereas it has also been characterized as an acid-tolerant species (Djelloul 2014).
The main threats to the species, are the intensification and change in land-use, particularly in forestry, as well as the impoverishment and decline of old semi-natural grasslands.
There is no evidence that relevant conservation actions take place.
The distribution of the species seerms to be very fragmented and severe local action for its protecion are needed.
The current distribution of the species should be further investigated, to identify if there are more localities. Reexamination of herbarium specimens may disclose additional records of the species and facilitate the clarification of its distribution. Enhanced knowledge about its habitat requirement would be advantageous to assess its conservation status. It is essential habitat conservation and better management.
There are no uses reported.
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