Elaphocordyceps valvatostipitata (Kobayasi) G.H. Sung, J.M. Sung & Spatafora

Taxonomy
Authority: 
(Kobayasi) G.H. Sung, J.M. Sung & Spatafora
Citation: 
Studies in Mycology 57: 38.
Classification: 
Elaphocordyceps, Ophiocordycipitaceae, Hypocreales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Type Specimen: 
TNS F-230284
Type Locality: 
Sirahata, Yonezawa City, Yamagata prefecture, Japan
Morphology
Stroma: 

Stromata solitary or cespitose, 45-70 mm in height, capitate, arising from the fruiting body of Elaphomyces species.  Fertile part ovoid, oblong, or barrel shaped, 7-18 x 5-9 mm, mammilate with otioles, distinctly separated from stipe, pale blue to grayish-blue.  Stipe thick, columnar, 4-6 x 5-6 mm, pale lemon-yellow when young, becoming olivaceous, upwardly valvate.  Valve leathery lemon yellow, later the neck part of the head emerge and elongate through the valve, rupturing it, 2.5-3.5 mm thick, striated or smooth. 

 
Perithecia: 

Perithecia medium sized, with rather short neck, 630-700 x 240-270 um.

Asci: 

Asci 400-460 x 10-12 um.  Apical cap 6 um in diameter.

Ascospores: 

Ascospores disarticulate into partspore which are cylindrical with truncated ends, 7.5-16 x 2.5-3 um. 

Ecology
Host or Substrate: 

on the truffle Elaphomyces (Ascomycota, Fungi)

Known Distribution: 
Japan
Notes
Commentary: 

Specimens reported growing from Elaphomyces neoasperulus and E. granulatus

References
Page Author: 
Alisha Owensby