Longistriata Sulzbacher, Orihara, Grebenc, M.P. Martin & Baseia, 2020

Sulzbacher, Marcelo A., Orihara, Takamichi, Grebenc, Tine, Wartchow, Felipe, Smith, Matthew E., Martin, Maria P., Giachini, Admir J. & Baseia, Iuri G., 2020, Longistriata flava (Boletaceae, Basidiomycota) - a new monotypic sequestrate genus and species from Brazilian Atlantic Forest, MycoKeys 62, pp. 53-73 : 53

Longistriata Sulzbacher, Orihara, Grebenc, M.P. Martin & Baseia gen. nov.

Etymology.

Longis (Latin), with or from the long; striatus (Latin), striate, fluted; in reference to the distinctive series of thin longitudinal striations on the surface of the basidiospores.

Diagnosis.

Distinguished from other genera in Boletaceae by a combination of the following characters: Basidiomata hypogeous to subhypogeous, sequestrate, subglobose, with a short stipe (Fig. 3A-B ). Peridium bright yellow, smooth, with a cutis of interwoven and gelatinized inflated hyphae. Subgelatinous sterile base (a short stipe) present. Gleba loculate, white when immature to yellowish brown at maturity, turning dark green to black when cut in older basidioma, columella absent. Basidiospores broadly ellipsoid, hyaline to light brown at maturity, dextrinoid, with a series of thin, irregular longitudinal ridges across the spore surface; in some places these ridges are fused together. Cystidia are lageniform with rounded apices. Clamp connections absent. Found in white sand habitat in tropical ectotrophic forests. Potentially mycorrhizal with tropical ectomycorrhizal plants from genera Coccoloba ( Polygonaceae ) and Guapira ( Nyctaginaceae ).

Type species.

Longistriata flava Sulzbacher, Orihara, Grebenc, M.P. Martín & Baseia, sp. nov.

Figures

Figure 3. A-G Longistriata flava (UFRN-Fungus 1756, holotype) A-B fresh mature basidioma C hymenophoral trama mounted in 3 % KOH with Congo Red D interwoven hyphae of peridium (upper left) and hymenophoral trama mounted in 3 % KOH with Congo Red E hymenial cystidia mounted in 3 % KOH with Congo Red F basidiospores mounted in Melzer's reagent G basidiospores mounted in 3 % KOH.