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Ophiocordyceps sphecocephala (Klotzsch ex Berk.) G.H. Sung, J.M. Sung, Hywel-Jones & Spatafora

Taxonomy
Authority: 
(Klotzsch ex Berk.) G.H. Sung, J.M. Sung, Hywel-Jones & Spatafora
Citation: 
Studies in Mycology 57: 47.
Classification: 
Ophiocordyceps, Ophiocordycipitaceae, Hypocreales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Morphology
Stroma: 

Stromata usually simple, 2-5 cm long, stipitate, arising from any joint but often between the head and thorax of infected adult wasp (Hymenoptera). Stipe ochraceous to cream yellow, slender, fibrous, often slightly twisted, 0.5-1 mm thick. Fertile head usually fusoid , 5-8 mm in length and 1.5-2 mm in thickness,  ochraceous to cream yellow, rough on the upper surface from the apices of the perithecia.

 
Perithecia: 

Perithcia immersed, conoid, oblique with a curved neck, 900-1000 x 200-250 um, with the ostioles opening on the upper surface of the head.

 
Asci: 

Asci hyaline, cylindrical, 500-600 x 4-6 um, possessing a prominent apical cap, 4-5 um thickness.

 
Ascospores: 

Ascospores filiform, nearly as long as ascus, multiseptate, easily breaking into hyaline part-spores. Partspores fusoid, 10-14 x 1.5-2.5 um.

 
Anamorph
Genus: 
Hymenostilbe
Species: 
sphecocephala
Notes: 

conidiogenous cells  variable, cylindrical, 10-20 x 3-6 um with one to three stout denticles. Conidia broadly clavate, strongly apiculate, 3-10 x 3-4.5 um.

Ecology
Host or Substrate: 

on adult of wasps (Hymenoptera)

Known Distribution: 
China, Colombia, Jamaica, Japan, Korea, Nepal, Taiwan, Thailand, United States of America
References
Page Author: 
Mingjun Chen, Gi-Ho Sung