Austropaxillus
Austropaxillus infundibuliformis
Scientific classification
Kingdom:
Fungi
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Boletales
Family:
Serpulaceae
Genus:
Austropaxillus

Bresinsky & Jarosch (1999)
Type species
Austropaxillus statuum
(Speg.) Bresinsky & Jarosch (1999)
Species
  • A. boletinoides
  • A. chilensis
  • A. contulmensis
  • A. infundibuliformis
  • A. macnabbii
  • A. muelleri
  • A. nothofagi
  • A. squarrosus
  • A. statuum

Austropaxillus is a genus of fungi in the family Serpulaceae, containing nine species found in Australia, New Zealand and South America.

Taxonomy and naming

In 1999, Andreas Bresinsky and colleagues studied the genus Paxillus, which appeared to have a centre of diversity in the Southern Hemisphere as a number of species had been described from Australia and New Zealand, and Chile and Argentina in southern South America. Genetic analysis revealed that members of what had been broadly construed as Paxillus fell into three distinct clades. The Southern Hemisphere species were found to be in a lineage that is most closely related to the brown rot genus Serpula.[1] Supporting this is the finding that the compound 2,4,5-trihydroxyphenylglyoxylic acid has been isolated from members of both Austropaxillus and Serpula.[1] Hence they moved these species into the new genus Austropaxillus.[1] Later analysis revealed a relationship to Gymnopaxillus, a small genus of truffle-like fungi known from south-eastern Australia, Argentina, and Chile.[2] Austropaxillus and Gymnopaxillus, both mycorrhizal genera, form a monophyletic clade that is sister to the saprotrophic genus Serpula. Using molecular clock analysis, the split between Austropaxillus and Serpula has been estimated to have occurred about 34.9 mya, roughly coinciding with the separation of South America and Australia from Antarctica.[3]

The prefix Austro is derived from the Latin word auster "south".[4] The type species is Austropaxillus statuum from South America.[5]

Description

Morphologically, the fruit bodies of these fungi resemble those of Paxillus, namely they have funnel-shaped caps with inrolled margins and decurrent gills. In the case of Austropaxillus, the gills are always forked. The spore print is brown. Microscopically they have long spindle-shaped spores from 7.8 to 16 μm long.[1]

Species

According to the Dictionary of the Fungi (10th edition, 2008), the genus contains nine species found in the temperate Southern Hemisphere.[6] Bresinsky and Jarosch defined the species Austropaxillus aurantiacus in their 1999 publication on the genus, but this is not a valid name because it is a homonym of Paxillus aurantiacus published by Job Bicknell Ellis in 1882. It is now known as Austropaxillus macnabbii.[7]

Name Authority  Year Basionym Distribution
A. boletinoides (Singer) Bresinsky & Jarosch 1999 Paxillus boletinoides
Singer (1952)[8]		 Argentina, Chile
A. chilensis (Garrido) Bresinsky & Jarosch 1999 Paxillus chilensis
Garrido (1988)[9]		 Chile
A. contulmensis (Garrido) Bresinsky 1999 Paxillus contulmensis
Garrido (1988)[9]		 Chile
A. infundibuliformis (Cleland) Bresinsky & Jarosch 1999 Paxillus infundibuliformis
Cleland (1927)[10]		 Australia
A. macnabbii (Singer, J. García & L.D. Gómez) Jarosch 2001 Paxillus macnabbi
Singer, J.García & L.D.Gómez (1990)[11]		 New Zealand
A. muelleri (Berk.) Bresinsky & Jarosch 1999 Paxillus muelleri
Berk. (1873)[12]		 Australia
A. nothofagi (McNabb) Bresinsky & Jarosch 1999 Paxillus nothofagi
McNabb (1969)[13]		 New Zealand
A. squarrosus (McNabb) Bresinsky & Jarosch 1999 Paxillus squarrosus
McNabb (1969)[13]		 New Zealand
A. statuum (Speg.) Bresinsky & Jarosch 1999 Agaricus staatum
Speg. (1888)[14]		 Argentina

Cleland described a Paxillus aureus and P. eucalyptorum but no type material or subsequent collections exist.[15]

Ecology

Austropaxillus species form mycorrhizal relationships with trees of the genus Nothofagus and less commonly Eucalyptus.[1]

References

  1. 1 2 3 4 5 Bresinsky A, Jarosch M, Fischer M, Schönberger I, Wittmann-Bresinsky B (1999). "Phylogenetic relationships within Paxillus s. l. (Basidiomycetes, Boletales): Separation of a Southern Hemisphere genus". Plant Biology. 1 (3): 327–33. doi:10.1111/j.1438-8677.1999.tb00260.x. ISSN 1435-8603.
  2. ↑ Claridge AW, Trappe JM, Castellano MA (2001). "Australasian truffle-like fungi. X. Gymnopaxillus (Basidiomycota, Austropaxillaceae)". Australian Systematic Botany. 14 (2): 283–81. doi:10.1071/SB00012.
  3. ↑ Skrede I, Engh IB, Binder M, Carlsen T, Kauserud H, Bendiksby M (2011). "Evolutionary history of Serpulaceae (Basidiomycota): molecular phylogeny, historical biogeography and evidence for a single transition of nutritional mode". BMC Evolutionary Biology. 11: 230. doi:10.1186/1471-2148-11-230. PMC 3199774. PMID 21816066. Open access icon
  4. ↑ Simpson DP (1979). Cassell's Latin Dictionary (5th ed.). London: Cassell Ltd. p. 69. ISBN 978-0-304-52257-6.
  5. ↑ "Austropaxillus Bresinsky & Jarosch, Plant Biology, 1: 331, 1999". MycoBank. International Mycological Association. Retrieved 28 May 2013.
  6. ↑ Kirk PM, Cannon PF, Minter DW, Stalpers JA (2008). Dictionary of the Fungi (10th ed.). Wallingford, UK: CAB International. p. 70. ISBN 978-0-85199-826-8.
  7. ↑ "Austropaxillus aurantiacus Bresinsky & Jarosch, in Bresinsky, Jarosch, Fischer, Schönberger & Wittmann-Bresinsky, Pl. Biol. 1(3): 332 (1999)". Index Fungorum. CAB International. Retrieved 29 May 2013.
  8. ↑ Singer R. (1952). Pródromo de la Flora Agaricina Argentina. Lilloa (in Spanish). Vol. 25. Vaduz: Cramer. p. 431.
  9. 1 2 Garrido N. (1988). Agaricales s.l. und ihre Mykorrhizen in den Nothofagus-Wäldern Mittelchiles. Bibliotheca Mycologica (in German). Vol. 120. Berlin: J. Cramer. p. 118. ISBN 978-3-443-59021-5.
  10. ↑ Cleland JB. (1927). "Australian fungi: notes and descriptions. – No. 6". Transactions and Proceedings of the Royal Society of South Australia. 51: 298–306.
  11. ↑ Singer R, García J, Gómez LD (1990). The Boletineae of Mexico and Central America. I and II. Beihefte zur Nova Hedwigia. Vol. 98. J. Cramer. p. 4. ISBN 978-3-443-51020-6.
  12. ↑ Berkeley MJ. (1873). "Australian fungi, received principally from Baron F. von Mueller and Dr. R. Schomburgk". Botanical Journal of the Linnean Society. 1 (67): 155–77 (see p. 159). doi:10.1111/j.1095-8339.1872.tb02397a.x.
  13. 1 2 McNabb RFR. (1969). "The Paxillaceae of New Zealand". New Zealand Journal of Botany. 7 (4): 349–62. doi:10.1080/0028825x.1969.10428850.
  14. ↑ Spegazzini C. (1888). "Fungi Fuegiani". Boletín de la Academia Nacional de Ciencias en Córdoba. 11 (2): 135–311 (see p. 146).
  15. ↑ Watling, Roy; Gregory, Norma M. (1991). "Observations on the boletes of the Cooloola Sand-mass, Queensland and notes on their distribution in Australia: Part 3. Lamellate taxa". Edinburgh Journal of Botany. 48 (3): 353–91. doi:10.1017/S0960428600003085.
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