Cordyceps takaomontana Yakush. & Kumaz. 1941

Taxonomy
Authority: 
Yakush. & Kumaz.
Citation: 
Kobayasi (1941). The genus Cordyceps and it allies. Science Reports of the Tokyo Bunrika Daigaku (Section B, No. 84). 5: 53-260.
Classification: 
Cordyceps s. s., Cordycipitaceae, Hypocreales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Type Locality: 
Island of Honshu, Japan Musashi Province (now Tokyo, Saitma and Kanagawa Prefectures), Mt. Takao
Morphology
Stroma: 

Mycelia not covering the outside of the host, forming a fleshy whitish sclerotium formed from hyphae 2 – 5 um thick which are multiseptate, thin walled and irregularly joined.
Stromata solitary or forming aggregations of 2 – 8 or cespitose cylindrical or clavate 1 – 4 cm tall flesh almost fragile.
Stipes cylindrical single or almost forked 0.7 - 2.5 cm long 0.5 – 2.5 mm thick, equal, tapering or mature subcompressed, base rarely oppressed-thickened, at first pallid-yellowish (Maritius Yellow) then pallid-ochraceous (light Ochraceous Buff) or luteus (Orange Buff) not quite pale. Exterior slightly smooth-hairless, interior yellow, solid rarely hollow in maturity composed of hyphae compact and longitudinally arranged, 2.5 – 5.5 ?m thick which are multisepatate, thin walled, subhyaline and joined none.
Fertile parts terminal, distinctly clavate to cylindric 2 – 20 mm (typically 10-15 mm) long tapering 1.5 -3.5 mm thick, apice obtuse or subattenuate on high ostioles of the perithecia on the upper portion densely punctuated to covering the sides at maturity, Ochraceous Buff-Ocraceous-Orange otherwise Cream Colored. Medulla about 1.5 mm thick opaque and the hyphae arranged longitudinally 4 -8 um thick opaque thin walled with simple septa, interwoven.

 
Perithecia: 

Perithecia superficial to pseudoimmersed, upright, densely ordered, ovoid, 500 – 570 um long 230 – 300 um thick, ostioles mammiform protruding, peridium internally flavescent (Picric Yellow) 8 – 12 um wide and many spread (prostrate) compressed becoming yellow/gold cellular composition, peridium externally is cells vesicle-shaped in one layer, hyaline joined, upper part on the surface of the perithecia thin and lying down, hyaline, around 1.5 um thick septation loosely covered. Part between perithecia is cellular vesicle shaped, chained or hyphae twisting and spiraling 2.8 – 7 um thick thin-walled, hyaline, irregularly not closely packed easily pierced through water.

 
Asci: 

Asci cylindrical, nearly 360 um long 3.5 -4.5 um thick, apical cap hemispherical 2.5 – 3.5 4.2 um high by 3.5 – 4.5 um wide, canal axil short or obscure.

 
Ascospores: 

Partspores small, cylindrical truncate on both sides 3.8 7 × 0.8 – 1 um (usually 4 – 5 um long).

Anamorph
Genus: 
Isaria
Species: 
tenuipes
Authority: 
Peck
Notes: 

The original description lists the anamorph as I. japonica, however this name has been shown to be a synonym of I. tenuipes.

Ecology
Host or Substrate: 

Pupae of Lepidoptera larvae

Page Author: 
Ryan Kepler