Name: Donkia pulcherrima
Author: (Berk. & M.A. Curtis) Pilát
Citation: Bulletin de la Société Mycologique de France 52 (3): 328 (1936) [MB#275622]
Type: S. Carolina
MORENO, GABRIEL, et al. “Reappraisal of Climacodon (Basidiomycota, Meruliaceae) and reinstatement of Donkia (Phanerochaetaceae) using multigene data.” Phytotaxa 291.3 (2017): 171-182.
Donkia pulcherrima is macroscopically characterized by its dimidiate basidiomata with a hydnoid hymenophore, a cream to white colour, and sometimes having orange tones (Fig. 3a–c). Microscopically, the main diagnostic character is the presence the septa with multiple clamps (2–4) on the context hyphae. The abundant vacuolar contents in the core of the spines (Fig. 3d–e), the absence of cystidia, and the small, hyaline, ellipsoid to allantoid spores (4–5 × 1.5–2 μm, Moreno et al. 2007) are also helpful for species identification.
Donkia pulcherrima was described in detail by Moreno et al. (2007) as Climacodon pulcherrimus. This broadly distributed and variable species has been treated under many different names (Maas Gesteranus 1971). Pilát (1937) described leptocystidia for Climacodon pulcherrinus, and did not mention multiple clamp connections in his description. Gibertoni et al. (2004) noted the presence of gloeocystidia, but did not observe multiple clamp connections either. Salcedo et al. (2006) and Moreno et al. (2007), described and photographed multiple clamps at septa. The placement of C. pulcherrimus in Climacodon was questioned by Moreno et al. (2007), who suggested Donkia or Phanerochaete to be more appropriate genera for it. Molecular studies by Larsson (2007) and Papp et al. (2014) showed D. pulcherrima is distantly related to C. septentrionalis, type of Climacodon, and hence, it should be accomodated in the monospecific genus Donkia.
Hydnum pulcherrimum has been combined in, Creolophus, Donkia, Dryodon and Steccherinum, but never in Phanerochaete, albeit the presence of multiple clamps on context hyphae (Nakasone, 1990). Phanerochaete calotricha (P. Karst.) J. Erikss. & Ryvarden, P. sanguinea (Fr.) Pouzar and P. laevis (Fr.) J. Erikss. & Ryvarden, for instance, possess septa with 2–3 clamps (Erikson et al. 1978). Burdsall (1985) cited this feature for 13 species of Phanerochaete.
Donkia pulcherrima has a mainly tropical to subtropical distribution. It has been reported from Japan, Java, Pakistan, Peninsula Malaysia, Philippines, Sikkim, Singapore and Thailand in Asia (Pilát, 1937; Maas Gesteranus, 1971), from France (Candoussau, 1981), Russia (Pilát, 1933; 1937), Spain (Salcedo et al. 2006; Moreno et al. 2007) and Hungary (Papp et al. 2014) in Europe. In America, Bononi (1979) and Gibertoni et al. (2004) cited it from Brazil, while Nakasone (1990) and Gilbertson et al. (1975) found it in North America. In the present work, Donkia pulcherrima is cited from North Africa (Morocco; AH 39127) for the first time.
Created: 2017-03-22 17:31:43 CST (-0600) by Erlon (Herbert Baker)
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