prl12612a

Genus Sarcodontia Schulzer

Verhandlungen der Zoologisch-Botanischen Gesellschaft Wien 16: 41 (1866)

Type: Sarcodontia mali Schulzer, Verhandlungen der Zoologisch-Botanischen Gesellschaft Wien 16: 41 (1866) = Sarcodontia setosa (Pers.) Donk, Mycologia 44 (2): 262 (1952)

Genus Crustodontia Hjortstam & Ryvarden

Synopsis Fungorum 20: 36 (2005)

Type: Corticium chrysocreas Berk. & M.A. Curtis, Grevillea 1(12): 178 (1873)

This is one of the six or more small clades in the broader Phlebia clade, which in turn is one of three major clades in the large Phlebioid clade (Floudas and Hibbett 2015). The genus Crustodontia was created for the pantropical crust Corticium chrysocreas, which is also found in the eastern United States (more common in the south). Phlebia uda, recently treated as Mycoacia uda, occurs across the United States, and is shown to be related to C. chrysocreas and an undescribed Phlebia sp. (Floudas and Hibbett 2015). But Justo et al. (2017) show it related more closely to Sarcodontia crocea, the type species of Sarcodontia, thus I am treating the species here as Sarcodontia uda.

  1. Crustodontia chrysocreas, hymenium is smooth to warted or with crowded blunt teeth, color is yellowish brown to yellow (or orange), the subiculum (layer under hymenium) and mycelium is often bright yellow; stains purple with KOH. Microscopically it possesses small cylindrical to ventricose-rostrate cystidia and two types of hyphae, some of which are coated with yellow granules that dissolve and turn KOH solution red (Lombard et al. 1975). In the USA this species was confused with Phlebia livida.
  2. Sarcodontia uda [PRL 12612: bright yellow teeth; dark purple with KOH.] Hymenium with pegs or teeth that are pallid (pale tan) to bright yellow; subiculum is whitish to yellow. It is distinguished by basidiomata that turn purple, red or brown in KOH, resinous covered hyphal-end cells in the teeth, short, fusiform cystidia [spindle-shaped; not encrusted], and ellipsoid basidiospores (Nakasone 1997). These characters that separate it from Mycoacia are actually similar to those of C. chrysocreas.
Taxonomy:
It is likely that the name Sarcodontia will be used for Phlebia uda. Sarcodontia has priority over Crustodontia if the two clades are treated as one genus. For a phylogeny see Floudas and Hibbett (2015) and Justo et al. (2017).
Related links:
Floudas D., D.S. Hibbett. 2015. Revisiting the taxonomy of Phanerochaete (Polyporales, Basidiomycota) using a four gene dataset and extensive ITS sampling. Fungal Biology 119(8): 679-719.
Justo, A., O. Miettinen, D. Floudas, B. Ortiz-Santana, E. Sjökvist, D. Lindner, K. Nakasone, T. Niemelä, K.-H. Larsson, L. Ryvarden, D.S. Hibbett, A revised family-level classification of the Polyporales (Basidiomycota), Fungal Biology (2017), doi: 10.1016/j.funbio.2017.05.010.
Nakasone, K. K. 1997. Studies in Phlebia. Six species with teeth. Sydowia 49(1): 49-79. (PDF)
Lombard, F.F., H.H. Burdsall, R.L. Gilbertson. 1975. Taxonomy of Corticium chrysocreas and Phlebia livida. Mycologia. 67(3): 495-510
Taxon links:
18502 MycoBank ; Index Fungorum ; Species Fungorum

Note. Work in the Chicago area is preliminary. We have additional unexamined toothed corticioid specimens.