Phylum:Basidiomycota >> Class: Basidiomycetes >>  Order: Tremellales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Tremella resupinata

Tremella resupinata C. J. Chen, Bibliotheca Mycologica 174: 1-225. 1998.

 Description: Basidiocarps resupinate, crumpled on the surface, 0.3-0.5 cm ø, whitish gray when young, whitish cream when old, dry becoming hyaline with grayish reflection; on stromata of Hypoxylon sp. Basidia ±globose, subglobose, ellipsoid to pyriform, 27-40 × 22-31(-35) μm [Q=(0.82-) 0.97-1.36(-1.59)], with or without stalks, if with stalks, short, 1-2(-7) μm in length, longitudinally or obliquely cruciate-septate, 2- or 4-spored; sterigmata up to 150 μm in length, 6-9 μm ø, frequently apically swollen up to 13 μm ø, sometimes apically fork-shaped, but normally only forming one basidiospore; new basidial hyphae frequently originating from basidial clamps. Spores two types: type I ±globose to subglobose, 13-17 × 14-16 μm [Q=0.93-1.07 (-1.14)]; type II ellipsoid to oval, 19-24 × (12-)14-17 μm [Q=(1.18-)1.24-1.50(-1.92)]; hyaline, smooth, germinating by budding or repetition, occasionally germinating to forked hyphae by germ tubes, then producing secondary spores by repetition; sometimes budding spores not detached but immediately producing secondary spores by repetition. Conidia absent. Vesicles absent. Swollen cells absent. Hyphidia absent. Hyphae hyaline, smooth, gelatinous thick-walled, 3-5 μm ø; often originating from basidial clamps. Haustoria small, globose to subglobose, ca. 2 μm ø, clamped, often growing from clamped hyphae.

Taiwan, Hsinchu County, Kuanwu Forest, leg. C.-J. Chen, 02. VII. 1996, CCJ 1458, on stromata of Hypoxylon sp. on branches of decayed wood.

 Habitat: null



Chen, CJ. 1998.


C. J. Chen

 Note: A resupinate Tremella growing on the stromata of Hypoxylon sp. was not reported before. Tremella resupinata is quite different from Fuciformis group macromorphologically, but ecologically it is growing from stromata of Hypoxylon sp. like in T. fuciformis. The extremely large and thick-walled basidia are rare in Tremella. The only two reported species with this feature are T. brasiliensis Lloyd and T. grandibasidia Olive. However, Tremella resupinata has resupinate and whitish basidiocarps, while the basidiocarps of T. brasiliensis are foliaceous and yellow, and those of T. grandibasidia are pulvinate, nodulated and straw-yellow. Although macroscopically T. resupinata is unlike the characters of Tremella, however, the hymenium consisting of tremelloid basidia and basidiospores budding off yeasts, are typical Tremella. The rDNA sequences alignment proved it is a real Tremella and is clustered to the Fuciformis group. Although its subhymenium is not so firm like T. fuciformis, however, it has numerous hyphal anastomoses and associates with Hypoxylon sp. like in T. fuciformis. Those similarities explain why it is clustered to the Fuciformis group when analyzed by ITS and LSU rDNA sequences (Chen, 1998).