Odontoefibula C.C. Chen & Sheng H. Wu

Chen, Che-Chih, Wu, Sheng-Hua & Chen, Chi-Yu, 2018, Hydnophanerochaete and Odontoefibula, two new genera of phanerochaetoid fungi (Polyporales, Basidiomycota) from East Asia, MycoKeys 39, pp. 75-96 : 75

Odontoefibula C.C. Chen & Sheng H. Wu gen. nov.

Type species.

Odontoefibula orientalis .

Etymology.

From odonto (= tooth-like) + efibula (= without clamp connection), referring to the odontioid hymenial surface and simple-septate hyphae of the genus.

Description.

Basidiocarps annual, resupinate, effused, adnate, membranaceous to ceraceous. Hymenial surface at first honey yellow, becoming ochraceous to pale brown with age, turning dark reddish in KOH, initially smooth to slightly tuberculate, becoming grandinioid to odontioid with age. Aculei conical to cylindrical, separate or fused, up to 0.3 mm long.

Hyphal system monomitic; hyphae normally simple-septate. Subiculum uniform, with dense texture; basal hyphae interwoven, somewhat horizontal or with irregular orientation, colourless, thin- to slightly thick-walled; subicular hyphae somewhat vertical, colourless, thin- to slightly thick-walled. Subhymenium not clearly differentiated from subiculum. Central trama of fairly dense texture; hyphae vertical, colourless, thin- to slightly thick-walled. Cystidia lacking, but projecting hyphal ends in the hymenium may be present. Basidia clavate to narrowly clavate, 4-sterigmate. Basidiospores ellipsoid, smooth, thin-walled, inamyloid, non-dextrinoid, acyanophilous.

Remarks.

Phaneroites Hjortstam & Ryvarden, a monotypic genus introduced to accommodate P. subquercinus (Henn.) Hjortstam & Ryvarden, resembles Odontoefibula in having odontioid hymenial surface and a monomitic hyphal system with ordinarily simple-septate hyphae. However, Phaneroites is distinguished from Odontoefibula by having thin-walled subicular hyphae, a few clamped septa on hyphae next to the substratum and subcapitate cystidia ( Hjortstam and Ryvarden 2010). Moreover, basidiocarps of Odontoefibula turn dark reddish in KOH, while this reaction was not reported from Phaneroites .