What are Lobulomycetalean Chytrids?
- The Lobulomycetales is a monophlytic order with one monophylytic family and five genera.
- Two species formerly formerly classified in Chytriomyces (1) have been transferred to the recently established order (4).
Another species of Chytriomyces (7) is most likely a member of this order based on zoospore ultrastructure.
- This is one of two orders of chytrids that include members that inhabit dung (the other order is the Spizellomycetales).
- Phylotypes which place in this clade are commonly found in molecular analyses of environmental samples, suggesting
a great deal of undescribed biodiversity in this order. It is of special interest that some of the sites of these phylotypes are harsh environments (4, 5).
Current systematic synthesis of the order Lobulomycetales:
The Order Lobulomycetales includes five genera and six species:
Lobulomycetaceae D.R. Simmons
Lobulomyces angularis (Longcore) D.R. Simmons
Lobulomyces poculatus (Willoughby & Townley) D.R. Simmons
Clydaea vesicula D.R. Simmons
Maunachytrium keaense D.R. Simmons
Alogomyces tanneri D.R. Simmons & P.M. Letcher (Alogomycetaceae Doweld)
Cyclopsomyces plurioperculatus K. Seto & Y. Degawa
Lobulomycetalean Chytrids are Found in Diverse Habitats:
Lobulomycetalean chytrids are common in the soil and have been found in horse dung (Alogomyces tanneri). Cyclopsomyces plurioperculatus, isolated from forest soil in Japan, is unusual within this group because the sporangium forms multiple operculate discharge openings (3). Ultrastructural chacterization of the zoospore of Chytriomyces multioperculatus indicates that this taxon is a member of this order (7).
- 1. Letcher, P.M. and M.J. Powell. 2002. A taxonomic summary of Chytriomyces (Chytridiomycota) Mycotaxon 84: 447-487.
- 2. Longcore, J.E. 1992. Morphology and zoospore ultrastructure of Chytriomyces angularis sp. nov. (Chytridiales). Mycologia 84(3): 442- 451.
- 3. Seto, S. and Y. Degawa. 2015. Cyclopsomyces plurioperculatus: a new genus and species of Lobulomycetales (Chytridiomycota, Chytridiomycetes) from Japan. Mycologia 107: 633-640.
- 4. Simmons, D.R., T.Y. James, A.F. Meyer, and J. E. Longcore. 2009. Lobulomycetales, a new order in the Chytridiomycota. Mycological Research 113: 450-460.
- 5. Simmons, D.R., P.M. Letcher, M.J. Powell, and J.E. Longcore. 2012. Alogomyces tanneri gen. et sp. nov., a chytrid in Lobulomycetales from horse manure. Mycologia 104: 157-163. DOI:10.3852/11-043
- 6. Willoughby, L.G. and P.J. Townley. 1961. Two new saprophytic chytrids from the lake district. Transaction of the British Mycological Society 44(2): 177-184.
- 7. Chen, S. 2014. Morphology and zoospore ultrastructure of Chytriomyces multioperculatus (Chytridiales). Taiwania 59(4): 287-291.