Phylum：Basidiomycota　>>　Class： Basidiomycetes　>>　 Order： Russulales 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Gloeocystidiellum aculeatum
 
   
   
　Author：

Gloeocystidiellum aculeatum Sheng H. Wu, Mycotaxon 58: 29. 1996.
   
 
 
 
 
　Description： Basidiocarp resupinate, effuse, adnate, membranaceous (aculei subceraceous), 100-300 μm thick in section (aculei excluded). Hymenial surface light orange to "pale yellow", odontioid, cracked; margin paler, thinning, arachnoid. Aculei 3-5 per mm, mostly separate, conical or subulate, 120-250 μm wide, up to ca. 700 μm long. Hyphal system monomitic; hyphae simple-septate. Subiculum fairly uniform, composed of medullary layer, with fairly loose texture; hyphae colorless, variously oriented, sparsely ramified, distinct, fairly straight, 2.5-5 μm diam., with 0.5-1.2 μm thick walls. Hymenium thickening, with dense texture, differentiated from subiculum; hyphae colorless, vertical, 2-3 μm diam., thin-walled. Trama with compact texture; hyphae colorless, vertical. Gloeocystidia numerous, immersed or slightly emergent, colorless to yellowish, globose, clavate or cylindrical, with stalked bases, with small oil-drops, 7-20 μm diam., up to ca. 150 μm long, with 0.6-1.3 μm thick walls, SA+. Basidia subclavate, 15-23 × 4-4.5 μm, 4-sterigmate. Basidiospores subglobose, aculeate (smooth in KOH), thin-walled, 3-3.5 × 2.3-2.8 μm, IKI bluish black, CB–.
 
 
 
 
 
　Specimens：

Taiwan. Kaohsiung: Liukuei, Shanping, alt. 750 m, on rotten wood of angiosperm, 14 Jul 1989, Wu 890714-52 (TNM, holotype; isotype: LY).
 
 
 
　Habitat： null
 
 
 
　Distribution：

Known only from Taiwan.
 
 
 
　References：

Wu, SH. 1996.
   
   
   
　Provided：

S. H. Wu
 
 
　Note： Among Gloeocystidiellum s.l. species with an odontioid hymenial surface and simple-septate hyphae, this new species is similar to Gloiothele lamellosa (P. Henn.) Bres. but differs from the latter in having aculeate basidiospores. In addition, the projections on the hymenial surface of G. lamellosa are just hyphal pegs. This species is distinct from Gloeocystidiellum convolvens and G. laxum in lacking encrusted cystidia.