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Cabalodontia (Meruliaceae), a Novel Genus for Five Fungi Previously Placed in Phlebia

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Cabalodontia (Meruliaceae), a Novel Genus for Five Fungi Previously Placed in Phlebia Polish Botanical Journal 49(1): 1–3, 2004 CABALODONTIA (MERULIACEAE), A NOVEL GENUS FOR FIVE FUNGI PREVIOUSLY PLACED IN PHLEBIA MARCIN PIĄTEK Abstract: The new genus Cabalodontia M. Piątek with the type Odontia queletii Bourdot & Galzin is described, and new com- binations C. bresadolae (Parmasto) M. Piątek, C. cretacea (Romell ex Bourdot & Galzin) M. Piątek, C. livida (Burt) M. Piątek, C. queletii (Bourdot & Galzin) M. Piątek and C. subcretacea (Litsch.) M. Piątek are proposed. The new genus belongs to Meruliaceae P. Karst. and is closely related to Phlebia Fr. Key words: Cabalodontia, Phlebia, Steccherinum, Irpex, Meruliaceae, new genus, corticoid fungi, taxonomy Marcin Piątek, Department of Mycology, W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, 31-512 Kraków, Poland; e-mail: [email protected] The generic placement of Odontia queletii Bourdot genera should be accepted as subgenera or sections & Galzin has been much debated, and the spe- within Irpex. In addition to Flavodon, Flaviporus cies has had a very unstable taxonomic position. and Junghuhnia, Kotiranta and Saarenoksa (2002) Christiansen (1960) combined it into Phlebia Fr. as transferred to Irpex species of Steccherinum that Phlebia queletii (Bourdot & Galzin) M. P. Christ., possess a dimitic hyphal system, including Parmasto (1968) transferred the species to the genus Hydnum ochraceum Pers., the generitype of Stec- Metulodontia Parmasto as Metulodontia queletii cherinum (Maas Geesteranus 1974). Irpex is now (Bourdot & Galzin) Parmasto, and fi nally Hal- defi ned as a genus possessing a dimitic hyphal lenberg and Hjortstam (1988) reallocated Odontia system, with simple septate or clamped generative queletii to Steccherinum Gray as Steccherinum hyphae, relatively small spores, large encrusted queletii (Bourdot & Galzin) Hallenb. & Hjortstam cystidia, an irpicoid, hydnoid, odontoid or poroid with another species, Steccherinum albo-fi brillosum hymenophore, and white rot. (Hjortstam & Ryvarden) Hallenb. & Hjortstam, In their new concept of the genus Irpex, Koti- originally described as Phlebia albo-fi brillosa Hjort- ranta and Saarenoksa (2002) did not include two stam & Ryvarden, with which it shares a monomitic above-mentioned species of Steccherinum with hyphal system, in contrast to the remaining species a monomitic hyphal system, S. albo-fi brillosum of Steccherinum which are dimitic. and S. queletii. However, Steccherinum cannot The taxonomy of the genus Steccherinum and be restricted to the two species with a monomitic its relation to the genus Irpex Fr.: Fr. was discussed hyphal system, excluding its type. It should be by Niemelä (1998), who concluded that the two are noted that Steccherinum albo-fi brillosum is consid- very similar, and also closely related to Flavodon ered to be a typical member of the genus Phlebia Ryvarden, Flaviporus Murrill and Junghuhnia (Nakasone 1997); this was apparently overlooked Corda. The name Irpex has priority over the re- by Kotiranta and Saarenoksa (2002). Moreover, maining generic names. Following this conclusion, recent molecular data from Boidin et al. (1998) Kotiranta and Saarenoksa (2002) proposed a new indicated that Steccherinum queletii is but distantly concept of the genus Irpex, which they greatly related to other species of Steccherinum (or Irpex, expanded by including species of Flavodon, Fla- if the current concept is adopted); those authors viporus and Junghuhnia. This taxonomic conclu- considered it a member of the genus Phlebia, as sion is clear and well-explained, but perhaps these Christiansen (1960) long ago concluded. 2 POLISH BOTANICAL JOURNAL 49(1). 2004 On the basis of molecular analyses of 20 spe- Taken together, normal nuclear behavior in the cies of Phlebia, Parmasto and Hallenberg (2000) above-mentioned fi ve species, together with the re- concluded that Phlebia queletii forms a separate sults of molecular studies (Parmasto & Hallenberg clade together with Phlebia bresadolae Parmasto. 2000), support the description of a new genus, for The other clade is formed by Phlebia s. str. (central which the name Cabalodontia is proposed. group or core), including the type of the generic name, Ph. radiata Fr., plus Ph. acerina Peck, Ph. Cabalodontia M. Piątek, gen. nov. lindtneri (Pilát) Parmasto, Ph. livida (Pers.: Fr.) Genus Meruliacearum, generibus Irpex et Phlebia Bres., Ph. rufa (Pers.: Fr.) M. P. Christ., Ph. sub- simile, sed systemate hypharum monomitico a genere ochracea (Bres.) J. Erikss. & Ryvarden, Ph. sub- Irpex, attitudine nucleari normali a genere Phlebia serialis (Bourdot & Galzin) Donk, Ph. tremellosa discedens. (Schrad.: Fr.) Burds. & Nakasone and Ph. uda (Fr.: TYPE: Cabalodontia queletii (Bourdot & Galzin) Fr.) Nakasone. Parmasto and Hallenberg (2000) M. Piątek (Odontia queletii Bourdot & Galzin). thought that the Ph. bresadolae-Ph. queletii clade might be recognized as a separate genus, but they Basidiomes resupinate, ceraceous to subge- refrained from formally describing it. They also latinous, odontoid, tuberculate or smooth; hyphal pointed out the diffi culty of characterizing such system monomitic, hyphae with clamps; cystidia a genus morphologically. Indeed, both species share lacking or present; basidia narrowly clavate; ba- many important characteristics with Phlebia s. str., sidiospores non-amyloid, allantoid or ellipsoidal; such as ceraceous basidiomes, a monomitic hyphal nuclear behavior normal. system, narrowly clavate basidia, and ellipsoidal, ETYMOLOGY. Named in honor of Jolanta non-amyloid basidiospores. Phlebia queletii has an Cabała, Polish phycologist, my friend and illus- odontoid hymenophore and numerous encrusted trator of my mycological papers; όδώυ, –όυτος, cystidia, while Phlebia bresadolae has a tubercu- tooth, in reference to the odontoid hymenophore late hymenium and lacks cystidia, but such differ- of the type species. ences can be observed between other species of Phlebia. However, both Ph. bresadolae and Ph. NOTE. The genus Cabalodontia is closely queletii differ from the central group of Phlebia by related to Phlebia, and belongs to the family having normal nuclear behavior, whereas the core Meruliaceae P. Karst. The genus comprises fi ve show astatocoenocytic (exceptionally heterocytic species occurring in the Northern Hemisphere. It is or holocoenocytic) behavior, which according to not impossible that Phlebia albo-fi brillosa, which Boidin (1971) characterizes the genus Phlebia. is very similar morphologically to Cabalodontia There are also three other species with normal queletii, will have to be transferred to it later, but nuclear behavior: Phlebia cretacea (Romell such a transfer should be supported by an exami- ex Bourdot & Galzin) J. Erikss. & Hjortstam, nation of its nuclear behavior. Phlebia segregata (Bourdot & Galzin) Parmasto Cabalodontia bresadolae (Parmasto) M. Piątek, and Phlebia subcretacea (Litsch.) M. P. Christ. comb. nov. (Hallenberg 1987, 1990; Wu & Chen 1992). These three species have been also included in the genus Basionym: Phlebia bresadolae Parmasto, Eesti NSV Jacksonomyces Jülich (Jülich 1982; Wu & Chen Tead. Akad. Toim. Biol. 16(4): 390. 1967. 1992), but the type of this genus, Peniophora ‘Corticium defl ectens’ sensu Bres. [non (P. Karst.) phlebioides H. S. Jacks. & Dearden, on the basis P. Karst., Ann. Mycol. 1(1): 94. 1903]. of morphological characters and interfertility tests, is considered to be synonym of Phlebia subserialis Cabalodontia cretacea (Romell ex Bourdot (Nakasone et al. 1982), which has astatocoenocytic & Galzin) M. Piątek, comb. nov. nuclear behavior. Therefore, the genus Jacksono- Basionym: Peniophora cretacea Romell ex Bourdot myces is probably a synonym of Phlebia s. str. & Galzin, Hymen. France: 288. 1928. = Phlebia cre- M. PIĄTEK: CABALODONTIA, GEN. NOV. 3 tacea (Romell ex Bourdot & Galzin) J. Erikss. & Hjort- (Madison, U.S.A.) for explaining the identity of Penio- stam, Cort. N. Europe 6: 1105. 1981. = Jacksonomyces phora phlebioides, to Professor Erast Parmasto (Tartu, cretaceus (Romell ex Bourdot & Galzin) Sheng H. Wu Estonia) and Dr. Sheng Hua Wu (Taichung, Taiwan) & Z. C. Chen, Bull. Nat. Mus. Nat. Sci 3: 261. 1992. for kind donations of reference material, and to Dr. = Peniophora romellii Litsch., in Bourdot, Bull. Soc. Krzysztof Pawłowski (Kraków, Poland) for latinizing Mycol. France 48(2): 212. 1932. = Phlebia romellii the diagnosis. (Litsch.) Parmasto, Eesti NSV Tead. Akad. Toim. Biol. 16(4): 393. REFERENCES Cabalodontia livida (Burt) M. Piątek, comb. nov. BOIDIN J. 1971. Nuclear behavior in the mycelium and the evolution of the basidiomycetes. In: R. H. PETERSEN (ed.), Basionym: Peniophora livida Burt, Ann. Missouri Bot. Evolution in the higher basidiomycetes, pp. 129–148. The Gard. 12: 239. 1926. = Jacksonomyces lividus (Burt) University of Tennessee Press, Knoxville. Jülich, Persoonia 11(4): 427. 1982. = Peniophora BOIDIN J., MUGNIER J. & CANALES R. 1998. Taxonomie mo- segregata Bourdot & Galzin, Hymen. France: 284. leculaire des Aphyllophorales. Mycotaxon 66: 445–491. 1928. = Phlebia segregata (Bourdot & Galzin) CHRISTIANSEN M. P. 1960. Danish resupinate fungi. Part II. Parmasto, Eesti NSV Tead. Akad. Toim. Biol. 16(4): Homobasidiomycetes. Dansk Bot. Ark. 19(2): 61–388. 393. = Jacksonomyces segregatus (Bourdot & Galzin) HALLENBERG N. 1987. Culture studies in Corticiaceae (Basidi- Sheng H. Wu & Z. C. Chen, Bull. Nat. Mus. Nat. Sci omycetes) II. Windahlia 17: 43–47. 3: 261. 1992. HALLENBERG N. 1990. Culture studies in Corticiaceae (Basidi- omycetes) III. Windahlia 18: 25–30.
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