Stypellopsis is a genus of fungi belonging to the family Stypellaceae, within the order Auriculariales (commonly known as jelly fungi and their relatives), class Agaricomycetes, and phylum Basidiomycota. Members of this genus are characterized by their typically resupinate (crust-like) growth form and often gelatinous or waxy consistency, commonly found growing on decaying wood.
Taxonomy and History
The genus Stypellopsis was formally described by the British mycologist D.A. Reid in 1956, with Stypellopsis crystallina as its designated type species. It is classified within the order Auriculariales, an diverse group of fungi that includes many "jelly fungi" known for their often gelatinous textures. While historically there might have been some taxonomic discussions or reclassifications, Stypellopsis is currently recognized as a distinct genus within the family Stypellaceae, which also encompasses related genera such as Stypella.
Characteristics
The fruiting bodies (basidiocarps) of Stypellopsis species typically exhibit the following characteristics:
- Growth Habit: They are primarily resupinate, meaning they grow as a thin, flattened crust that closely adheres to the surface of the substrate, usually the underside or sides of dead logs, branches, or stumps.
- Consistency: When fresh, the texture is often gelatinous, waxy, or cartilaginous, sometimes becoming firm and horny upon drying.
- Hymenophore: The spore-bearing surface (hymenophore) can vary among species, ranging from smooth to granular, merulioid (forming net-like folds), or hydnoid (featuring small teeth or spines).
- Coloration: Colors are generally subtle, often whitish, pallid, yellowish, or light brownish.
- Microscopic Features: Key microscopic characteristics include simple-septate hyphae (lacking clamp connections), deeply embedded probasidia, and generally ellipsoid to subglobose basidiospores.
Habitat and Ecology
Species of Stypellopsis are saprobic, meaning they derive their nutrients from decomposing organic matter. Their primary habitat is dead wood of various tree species in forested ecosystems. They play an important ecological role as decomposers, contributing to the breakdown of lignocellulose and the recycling of nutrients in forest environments. The genus has a wide distribution, with species found in diverse temperate and tropical regions across the globe.
Selected Species
Some recognized species within the genus Stypellopsis include:
- Stypellopsis crystallina (Reid)
- Stypellopsis bizoniformis (M.P. Christ.) A.L. Welden
- Stypellopsis pallida (G. Cunn.) A.L. Welden
- Stypellopsis coralloides (Welden)