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Collybiopsis

From Wikipedia, the free encyclopedia

Collybiopsis
Collybiopsis quercophila, the oak-leaf pinwheel
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Omphalotaceae
Genus: Collybiopsis
(J.Schröt.) Earle (1909)
Type species
Collybiopsis ramealis
(Bull.) Millsp. (1913)
Synonyms[1]
  • Marasmius III Collybiopsis J.Schröt. (1889)
  • Marasmiellus Murrill (1915)

Collybiopsis is a resurrected genus of mushroom-forming fungi in the family Omphalotaceae.

Taxonomy

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Collybiopsis is a genus of fungi in the family Omphalotaceae, order Agaricales. It was established by Franklin Sumner Earle in 1909 with Agaricus ramealis as the type species.[2] The genus encompasses a large clade of non-typical Gymnopus species and includes elements previously classified under Gymnopus, Marasmius, and Marasmiellus. While some researchers have used the name Marasmiellus for this group, Collybiopsis has nomenclatural priority. The Collybiopsis ramealis complex has been shown to be genetically diverse. Molecular phylogenetics studies have led to the reclassification of numerous tax within this genus. As of 2024, several new species have been proposed within Collybiopsis.[3] Some mycologists argue that the genus Collybiopsis may not encompass all species currently classified under Marasmiellus. As a result, they advocate for continued use of Singer's concept of Marasmiellus until the taxonomic relationships are more definitively resolved.[4]

Description

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Species of Collybiopsis have a diverse range of fruiting body forms, including shapes reminiscent of the genera Collybia, Gymnopus, Marasmiellus, Omphalina, and Pleurotus. Their gills may be free or extend down the stipe (decurrent). The stipe can be centrally or eccentrically positioned and may grow directly from the substrate (insititious) or have a slightly wider base (subinsititious). Microscopically, Collybiopsis is characterised by ellipsoid to oblong spores that are transparent (hyaline) and do not react with iodine stain (inamyloid). These spores produce white spore prints. The stipe surface features specialised cells called caulocystidia. The cap's outer layer (pileipellis) is distinguished by coral-like or branching (diverticulate) structures at the tips of its fungal filaments.[5]

Species

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As of October 2024, Species Fungorum (in the Catalogue of Life) accept 60 species of Collybiopsis.[6]

Collybiopsis confluens
Collybiopsis peronata
Collybiopsis californica
Collybiopsis villosipes

References

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  1. ^ "Synonymy. Current Name: Collybiopsis (J. Schröt.) Earle, Bull. New York Bot. Gard. 5: 415 (1909)". Species Fungorum. Retrieved 19 October 2024.
  2. ^ Earle, F.S. (1909). "The genera of North American gill fungi". Bulletin of the New York Botanical Garden. 5 (18): 373–451 [415].
  3. ^ Petersen, Ronald H.; Hughes, Karen W. (2021). "Collybiopsis and its type species, Co. ramealis". Mycotaxon. 136 (2): 263–349. doi:10.5248/136.263.
  4. ^ Lu, Wenhua; Nutaratat, Pumin; Kumla, Jaturong; Tibpromma, Saowaluck; Elgorban, Abdallah M.; Karunarathna, Samantha C.; Suwannarach, Nakarin (2024). "Morphological and molecular identification of two new Marasmiellus species (Omphalotaceae, Agaricales) from Thailand". MycoKeys. 109: 31–48. doi:10.3897/mycokeys.109.129791.
  5. ^ a b c d e f g h Kim, Ji Seon; Cho, Yoonhee; Park, Ki Hyeong; Park, Ji Hyun; Kim, Minkyeong; Kim, Chang Sun; Lim, Young Woon (2022). "Taxonomic study of Collybiopsis (Omphalotaceae, Agaricales) in the Republic of Korea with seven new species". MycoKeys. 88: 79–108. doi:10.3897/mycokeys.88.79266.
  6. ^ "Collybiopsis". Catalogue of Life. Species 2000: Leiden, the Netherlands. Retrieved 19 October 2024.
  7. ^ a b Petersen, Ronald H.; Hughes, Karen W. (2024). "Two new species of Collybiopsis (Agaricales, Omphalotaceae) from Eastern North America". MycoKeys. 107: 95–124. doi:10.3897/mycokeys.107.122634.
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