• Proposed
  • Under Assessment
  • Preliminary Assessed
  • VUAssessed
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Melanoleuca bataillei Malençon

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Scientific name
Melanoleuca bataillei
Author
Malençon
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Agaricales
Family
Tricholomataceae
Assessment status
Assessed
Preliminary Category
VU B2(a)
Proposed by
Odysseas Theodorou
Assessors
Claudia Perini, Odysseas Theodorou
Editors
Claudia Perini, Odysseas Theodorou
Contributors
ISPRA Network for the study of Mycological Diversity
Comments etc.
Anders Dahlberg

Assessment Notes

Justification

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)


Taxonomic notes

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)


Why suggested for a Global Red List Assessment?

 


Geographic range

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).

AOO:
1600 km2
EOO:
2055203 Km2


Population and Trends

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


Habitat and Ecology

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).

Temperate ForestMediterranean-type Shrubby VegetationTemperate GrasslandOther

Threats

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.

Other threat

Conservation Actions

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.

Site/area protection

Research 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.


Use and Trade

There are no uses reported.


Bibliography

Bas, C., Kuyper, T. W., Noordeloos, M. E., & Vellinga, E. C. (1988). Flora agaricina neerlandica. Vol 1. A.A. Balkema Publishers.
Bon M. 1991. Flore Mycologique d’Europe 2. Les Tricholomes et ressemblants. Documents Mycologiques Mémoire Hors Série Numéro 2.
Boekhout T. 1988. Notulae ad Floram Agaricinam Neerlandicam XVI. New taxa, new combinations in Melanoleuca Pat. and notes on rare species in the Netherlands. Persoonia 13(4): 397–431.
De Paz Canuria E .2018. Colección de hongos del Herbario “Jaime Andrés Rodríguez”. LEB-Fungi. Version 1.7. Herbarium LEB Jaime Andrés Rodríguez. Facultad de Ciencias Biológicas y Ambientales. Universidad de León.. Occurrence dataset https://doi.org/10.15470/bn9ydo accessed via GBIF.org on 2021-04-23. 
Dahlberg, A. and Mueller, G. 2011. Applying IUCN red-listing criteria for assessing and reporting on the
conservation status of fungal species. Fungal Ecology 4: 1-16.
Delivorias, P. & Gonou-Zagou, Z. 2000. A taxonomic study of macromycetes from the Aroania Mountains. Proceedings of the 8th Scientific Congress of the Greek Botanical Society, 139-142, Patra, Greece [in Greek]
Djelloul,R. 2014, Cartographie des champignons au niveau du Parc National d’El Kala (Nord Est Algérien). phD thesis. Département de Biologie, Université de Annaba - Badji Mokhtar. [in French]
Fontenla R, Gottardi M, Lavorato C, Para R. 2003b. Osservazioni sul genere Melanoleuca: Tre specie descritte da Malençon & Bertault. Rivista di Micologia 46(4): 337–350.
Gonou-Zagou, Z. & Delivorias, P. 2000. The genus Melanoleuca Pat. in Greece: Preliminary study. Proceedings of the 22nd Conference of the Hellenic Society of Biological Sciences (abstract), p. 69. Skiathos Isl., Greece
Malençon G, Bertault R. 1975. Flore des champignons supérieurs du Maroc. Tome II. Travaux de l’Institut Scientific Chérifien et de la Faculté des Sciences de Rabat. Série botanique et bologie végétale No 33, Rabat.
MNHN, Chagnoux S. 2021. Herbarium specimens of Université de Montpellier 2, Institut de Botanique (MPU). Version 71.205. Herbarium of Université de Montpellier 2, Institut de Botanique. Occurrence dataset https://doi.org/10.15468/gyvkrn accessed via GBIF.org on 2021-04-23.
Ranz J. 2017. Banco de Datos de la Biodiversidad de la Comunitat Valenciana. Biodiversity data bank of Generalitat Valenciana. Occurrence dataset https://doi.org/10.15468/b4yqdy accessed via GBIF.org on 2021-04-23. 
Vizzini, A., Para, R., Fontenla, R., Ghignone, S., Ercole, E. (2011). A preliminary ITS phylogeny of Melanoleuca
(Agaricales) with special reference to European taxa. Mycotaxon, 118, 361-381
Zuccherelli Α, Pezzi G &Melandri; M.2001.Funghi di Romagna: Il comprensorio Ravennate.checklist.Quad. Studi Nat. Romagna, 14: 29-67


Country occurrence

Regional Population and Trends

Country Trend Redlisted