Austropaxillus mcnabbii (Singer, J. García & L.D. Gómez) Jarosch 2001
Details
Biostatus
Nomenclature
Classification
Synonyms
Associations
Descriptions
COLLECTIONS EXAMINED: Under (1) N. fusca. Nelson: Lake Daniels Track, 15.v.1969, R. F. R. McN.; (2) N. fusca and N. menziesii. Nelson: Maruia, 6.v.1968, R. F. R. McN.: (3) N. menziesii and N. solandri, Canterbury: Lewis Pass near Dan's Bridge, 7.v.1968, R. F. R. McN.; Boyle River, 25.iv.l969, R. F. R. McN.: (4) N. menziesii and N. solandri var. cliffortioides, Canterbury: near Cass, 31.iii.l968, M. J. Noonan
(ISOTYPE, PDD 26294).
Paxillus aurantiacus belongs in sect. Defibulati and is closely related to P. squarrosus. It differs in the yellow pileus, structure of the cuticle, white unchanging context, presence of sterile structures in the hymenium, and the finely velutinate to subglabrous stipe. The unchanging context, repeatedly dichotomously branched lamellae, and differences in chemical characters distinguish it from the South American P. statuum.
Singer (1962) indicated that if the Australian species P. muelleri (Berk.) Sacc. lacked clamp connections, it also should be included in sect. Defibulati. Subsequent examination of authentic material by Pegler (1965) showed that clamp connections were absent in this species, and the section now contains four species endemic to the South Temperate Zone.
Recently, Bresinsky & Jarosch (Bresinsky et al.1999) created a new bolete genus Austropaxillus to accommodate Southern Hemisphere species of Paxillus, including three New Zealand endemic species described by McNabb (1969). One of McNabb's names, Paxillus aurantiacus, is an illegitimate later homonym; consequently, Bresinsky & Jarosch's binomial Austropaxillus aurantiacus must be treated as a nomen novum dating from 1999 rather than a combinatio nova based on a 1969 basionym (Greuter et al. 2000, Article 58). Thus, the nomen novum Paxillus macnabbii previously published by Singer et al. (1990) has priority, and it is here recombined in Austropaxillus.
Austropaxillus macnabbii (Singer, J.García & L.D.Gómez) Pennycook, comb. nov.ç Paxillus aurantiacus McNabb, N.Z. J. Bot. 7, 357 (1969), nom. illegit., non Ellis 1882. ç Paxillus macnabbii Singer, J.García & L.D.Gómez, Beih. Nova Hedwigia 98, 4 (1990), nom. nov., as "mcnabbii".ç Austropaxillus aurantiacus Bresinsky & Jarosch, in Bresinsky et al., Plant Biology 1, 332 (1999), nom. nov. superfl., as "comb. nov."
NOTES: Index of Fungi 6: 442, 1994, is mistaken in attributing the misspelt epithet "auranticus" to McNabb (1969); the origin of this misspelling is a typographic error in Index of Fungi 3: 561, 1970.