Fomitiporia roseo-bubalina Jian Chen, Yuan Yuan, K. Y. Luo, Y. C. Dai & Vlasák, 2025

Chen, Jian, Vlasák, Josef, Luo, Kai-Yue & Yuan, Yuan, 2025, Three new species of Fomitiporia (Hymenochaetales, Basidiomycota) from tropical dry forests in Ecuador and Peru, MycoKeys 118, pp. 267-287 : 267-287

Fomitiporia roseo-bubalina Jian Chen, Yuan Yuan, K. Y. Luo, Y. C. Dai & Vlasák sp. nov.

Figs 4 , 5

Diagnosis.

Fomitiporia roseo-bubalina is related to F. ovoidospora Y. C. Dai & F. Wu , but F. ovoidospora differs from F. roseo-bubalina by perennial basidiocarps, the presence of fusoid cystidioles, smaller pores (9–10 per mm vs. 4–5 per mm), and smaller basidiospores (4.7–5.5 × 3.8–5 µm vs. 5.3–6.7 × 5–6.2 µm).

Holotype.

Ecuador • Arenillas , dry tropical forest, on the base of living Acacia , 17.II.2024, leg J. Vlasák, JV 2402/1 ( BJFC 053710 ).

Etymology.

Roseo-bubalina (Lat.) refers to the new species characterized by pink-buff pores when dry.

Description.

Basidiomata annual to perennial, resupinate to pileate, inseparable, growing around bark fissures at the base of living trees in shelf-like, vertical assemblages of triquetrous pilei, without distinctive odor or taste when fresh, woody hard in consistency; pilei slightly ungulate, projecting up to 2.5 cm, 3 cm wide, and 0.5 cm thick at base; pileal surface grayish, glabrous; margin blunt. Pore surface pink buff when dry, glossy; sterile margin cream, up to 1 mm wide; pores circular to angular, 4–5 per mm; dissepiments thin, entire. Context very thin; tubes yellowish brown, paler than pore surface, woody hard, up to 2 mm long, annual layers indistinct.

Hyphal structure. Hyphal system dimitic, generative hyphae simple septate; all hyphae IKI -, CB -; tissue becoming dark brown in KOH.

Tubes. Generative hyphae pale yellowish, slightly thick-walled, rarely branched, frequently septate, 2.5–3.5 µm in diam; skeletal hyphae dominant, yellowish, thick-walled, unbranched, more or less straight, parallel along the tubes, 3.5–4.8 µm in diam. Hymenial setae absent; cystidia and cystidioles absent; basidia subglobose to clavate, with four sterigmata and a simple septum at the base, 10–18 × 6–9 µm; basidioles dominant in hymenium, in shape similar to basidia, but slightly smaller.

Basidiospores globose, hyaline, thick-walled, smooth, IKI [+], CB +, (5 -) 5.3–6.7 (- 7.4) × (4.9 -) 5–6.2 (- 6.6) µm, L = 6.01 µm, W = 5.60 µm, Q = 1.07 (n = 30 / 1).

Type of rot. White rot.

Additional specimen (paratype) examined.

Ecuador • Arenillas , dry tropical forest, on the base of living Acacia , 17.II.2024, leg J. Vlasák, JV 2402/10A .

Figures

Figure 4. Basidiomata of Fomitiporia roseo-bubalina (Holotype, JV 2402 / 1). Scale bar: 1 cm.

Figure 5. Microscopic structures of Fomitiporia roseo-bubalina (Holotype, JV 2402 / 1) a basidiospores b basidia and basidioles c hyphae from the tube trama.