Phylum:Anamorphic fungi >> Class: Anamorphic fungi >>  Order: Anamorphic fungi 
 BCRC Number NO BCRC Number!  
 Scientific Name: Harposporium leptospira

Harposporium leptospira Drechsler, Sydowia 22: 189. 1969..

 Description: Colonies on CMA 1–1.1 cm diam. in 7 days at 27 ℃, densely powdery, brown, with entire margins, reverse brown. Mycelium spreading, floccose, vegetative hyphae hyaline, septate, branched, 2.5–6 μm wide. Assimilative hyphae developing within nematodes, 5–7 μm wide. Conidiophores protruding from dead nematodes, 33–110 μm long and 3–4 μm wide, 1–6 septate, simple, scattered. Conidiogenous cells discrete, lateral, phialidic, usually 2–4 in groups and verticillately arranged, each phialidic cell globose at base, 3–4 μm diam., provided with a cylindrical neck of 2–5 × 1.5 μm. Conidia hyaline, nonseptate, 2–9 individuals gathering at the neck of phialides, coiled into a spiral and left-handed rotation, 8–10 μm long straightly between two ends, 1–1.5 μm in width. Accessory conidia occurring only in culture of more than one month, hyaline, one or two-celled, broadly clavate, 8–12 × 2–5 μm, borne on phialidic, collarette cylindrical conidiogenous cells, which are integrated and terminal on simple or apically branched conidiophores. Accessory and spiral conidia arising from the same conidiophore, with the former on the top, while the later along the axis. Chlamydospores not observed.

Taiwan, Penghu County, from soil, 20 Apr. 2007, F.C. Liao, PH05.

 Habitat: From soil.

Taiwan, U.S.A.


Drechsler, CE. 1968; Li, TF et al. 2000.


C. Y. Chen and C. C. Kuo

 Note: Three species of Harposporium produce spiral-sphaped conidia (Li et al., 2000). They are H. drechsleri, H. cycloides and H. leptospira. H. leptospira differs in having conidiogenous cells in obviously verticillate arrangement.