Ophiocordyceps dipterigena (Berk. & Broome) G.H. Sung, J.M. Sung, Hywel-Jones & Spatafora

Taxonomy
Authority: 
(Berk. & Broome) G.H. Sung, J.M. Sung, Hywel-Jones & Spatafora
Citation: 
Studies in Mycology 57: 42.
Synonymy: 

Cordyceps dipterigena Berk. & Broome, J. Linn. Soc. 14: 111. 1875.
= Cordyceps muscicola A. Möller, Phycomyceten u. Ascomyceten, p. 221. 1901.
= Cordyceps surinamensis Henn., Hedwigia 41: 169 1902.    
= Cordyceps oumensis Höhn., Sitzungsber. Kaiserl. Akad.  Wiss. Wien 118: 309. 1909.
= Cordyceps ouwensii Höhn., Sitzungsber. Kaiserl. Akad.  Wiss. Wien 118: 309. 1909.  
= Cordyceps thwaitesii Lloyd, Mycol. Writ. 6: 1060. 1921.  
= Cordyceps opposita Syd., Bot. Jahrb. Syst. 57: 325. 1922.

Classification: 
Ophiocordyceps, Ophiocordycipitaceae, Hypocreales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Morphology
Stroma: 

Stromata one to several from the host, 2,5-8 mm long, capitate, the heads hemispherical to globoid, 1-2 mm wide, 0,5-1 mm wide, orange-cinnamon or cinnamon-brown, rough on the upper surface from the apices of the perithecia; the stipes cylindric, 0,2-0,5 mm thick, orange-cinnamon to light yellow, consisting of compact longitudinal interwoven hyphae continuing into the base of the head, becoming very loosely interwoven. The host is attached to the substratum by mycelium which spreads out forming crusts several mm wide.

 
Perithecia: 

Perithecia narrowly ovoid or conoid, 700-900 x 240-400 µm, vertical with the ostioles opening on the upper surface of the head; wall 15-25 µm thick, completely embedded.

Asci: 

Asci cylindric, 480-600 µm long, with a 4 µm thick cap.

Ascospores: 

Ascospores filiform, multiseptate, breaking up into cylindric or fusoid fragments 6-12 x 1-1,5 µm.

Anamorph
Genus: 
Hymenostilbe
Species: 
dipterigena
Authority: 
Petch
Citation: 
Transactions of British Mycological Society 16: 212, 1932.
Notes: 

Hymenostilbe dipterigena forms terete synnemata, sometimes forked, 4-12 mm long, 0,2-0,5 mm diam., brown, made up of longitudinal, interwoven, compacted hyphae with the conidiogenous cells forming a dense palisade layer, polyblastic, bearing solitary conidia on short denticles. Conidia clavate, differing in size with the strain according to the part of the world from which they were collected; Petch described a form from Ceylon with conidia 6-9 x 1,·5-2 µm; a form from Panama with conidia 4-7 x 2 µm and another 6-8 x 3-4 µm; another from Guyana 6-9 x 2·5-3 µm; Mains (1950) gives conidial measurements of strains from North and Central America as 4-9 x 2-4 µm but Samson & Evans point out that specimens from Ghana have larger conidia 9·5-13 x 2,5-3,5 µm.

Ecology
Host or Substrate: 

on adult of Diptera (Muscidae).

Known Distribution: 
Ghana, Indonesia, Japan, Sri Lanka, Thailand
References

Kobayasi, Science Reports of the Tokyo Bunrika Daigaku Section B, No. 84, 260 pp., 1941.

Kobayasi, Bulletin of the National Science Museum Series B, 4: 43-63, 1978.

Mains, Mycologia 42: 566-589, 1950; Mains, Mycologia 50: 169-222, 1958.

Morris, The Synnematous Genera of fungi Imperfecti, Western Illinois University Series in the Biological Sciences No. 3, 1963.

Samson & Evans, Proceedings, Koninklijke Nederlandse Akademie van Wetenschappen-Amsterdam Series C 78(1), 1975.

Page Author: 
Gi-Ho Sung