Three new species of Fomitiporia (Hymenochaetales, Basidiomycota) from tropical dry forests in Ecuador and Peru

Three new species in Hymenochaetaceae are illustrated and described from tropical Ecuador and Peru based on morphology and phylogenetic analyses. The species Fomitiporia robustiformis is characterized by perennial, pileate basidiocarps; ungulate pilei; brown and glabrous pileal surface; broad and rounded margin; yellowish-brown pore surface; circular to angular pores measuring 6–7 per mm; thick and entire dissepiments; a dimitic hyphal system; the presence of fusoid cystidioles; the presence of hymenial setae; and globose basidiospores measuring 5–6.4 × 4.7–6.1 µm.

Fomitiporia roseo-bubalina is characterized by annual to perennial, resupinate to pileate basidiocarps; ungulate to triquetrous pilei; grayish and glabrous pileal surface; blunt margin; pale gray and glossy pore surface; circular to angular pores measuring 4–5 per mm; thick and entire dissepiments; a dimitic hyphal system; the presence of hymenial setae and cystidioles; and globose basidiospores measuring 5.3–6.7 × 5–6.2 µm.

Fomitiporia triqueter is characterized by perennial, pileate, sessile basidiocarps; triquetrous pilei with sharp margins; grayish dark and cracked pileal surfaces with concentrically sulcate, pale yellowish brown pore surfaces; circular pores measuring 9–10 per mm; the absence of hymenial setae and cystidioles; the presence of large rhomboid crystals in the hymenium; and globose basidiospores measuring 3.4–5.5 × 3.2–5.4 µm.

The differences between the new species and morphologically similar and phylogenetically related species are also discussed.