Sistotremastrum chilensis Telleria, M. Dueñas & M.P. Martín, 2014

Telleria, M. Teresa, Dueñas, Margarita & Martín, María P., 2014, Sistotremastrum chilensis (Trechisporales, Basidiomycota), a new species from Chilean Patagonia, Phytotaxa 158 (1), pp. 93-98 : 94-97

Sistotremastrum chilensis Telleria, M. Dueñas & M.P. Martín , sp. nov. ( Fig. 2 )

Mycobank MB804754

Type:— CHILE, Los Lagos (X Region), Palena province, Comuna Hualaihué, Comau fjord, Huinay Reserve, path to Cerro del Tambor , 100 m, 42º22’44.5”S 72º24’25.8”W, on unidentified wood, 26 April 2012, M. Dueñas, M.P. Martín & M.T. Telleria, 19610Tell. (holotype, MA-Fungi 86368 !)

Diagnosis:—This new species is closely related to S. guttuliferum but differs by the shape of subicular and subhymenial hyphae and its unique ITS sequence.

Basidioma resupinate, adnate, very thin; hymenophore whitish, under the lens reticulate to porose; margin indeterminate. Hyphal system monomitic, hyphae with clamps, distinct; subicular hyphae up to 6 µm wide, irregular and sometimes arranged parallely next to the substrate; subhymenial hyphae thinner, 3−4 µm wide, straighter and with vertical direction; both with small oil drops in the cytoplasm, and loosely interwoven. Cystidia absent. Basidia subclavate to subtubular, thin-walled, with a basal clamp, (16−)21−27 × 6.5−8 µm, and six to eight short, 3 µm long sterigmata. Spores narrowly ellipsoid, thin walled, 5−6.5 × 2.5−3 µm, inamyloid, indextrinoid and acyanophilous.

Etymology:—Relating to Chile

Known distribution:—Valdivian temperate rainforest in Chilean Northern Patagonian region.

Additional specimens examined: — CHILE. Los Lagos (X Region), Palena province, Comuna Hualaihué, Comau fjord, Huinay Reserve, path to Cerro del Tambor , 100 m, 42º22’44.5”S 72º24’25.8”W, on unidentified wood, 26 April 2012, M. Dueñas, M.P. Martín & M.T. Telleria, 19594Tell. ( MA-Fungi 86366 !) . Los Lagos (X Region), Palena province, Comuna Hualaihué, Comau fjord, Huinay Reserve , 147 m, 42º22’9.0”S 72º24’42.7”W, on Lophosoria quadripinnata , 30 April 2012, M. Dueñas, M.P. Martín & M.T. Telleria, 19709Tell. ( MA-Fungi 86367 !) .

Figures

FIGURE 2. Sistotremastrum chilensis MA-Fungi 86368. a. Section through basidiome; bar = 25 µm. b. Basal hyphae. c. Subhymenial hyphae. d. Detail of hymenium with basidia and probasidia. e. Spores. bar = 10 µm (19610Tell., MA-Fungi 86368, holotypus)