Mortierella atrogrisea T.H. Beyma, Verh. K. Akad. Wet., tweede sect. 26(4): 24 1929.
Description：
Colonies growing fast on Potato Dextrose Agar at 25℃, effuse to villose, white to yellowish- brown, zonate, reverse pale gray. Mycelium mostly superficial, composed of branched, sparsely septate, smooth, hyaline to light brown hyphae, 2.3 – 8.5 μm wide. Sporangia globose, 7 - 10 μm in diameter. Sporangiophores erect, hyaline, branched, mostly in group of 2, slightly swollen at base, 88 – 277 × 2.3 – 9 μm, tapering at tip, in 1.5 – 3 μm, leaving a less distinct columella and collar. Sporangiospores hyaline, globose or subglobose, smooth, inconspicuously truncated, 2.5 – 3 μm in diam. Chlamydospores globose, subglobose, 30 – 40 μm in diam.
Specimens：
Taiwan, Ilan County, on a decaying wood, 18 Jun. 2009.
Habitat：
On a decaying wood.
Distribution：
Taiwan, Japan, world wide.
References：
Watanabe, T, Y. Watanabe, T. Fukatsu and R. Kurane, 1998.
Provided：
S. S. Tzean and T. W. Huang
Note：
The Umbelopsis genus is erected more recently by Gams, based on the basionym Micromucor isabellinus. Our isolate superficially is very similar to the isolate Mortierella turficola described by Ling (1930), also resemble to U. isabellina describe by Watanabe (Watanabe et al, 1993, 1998) and Turner (Turner, 1963), respectively. However, we prefer classifying our isolate as U. isabellina rather than M. turficola, mainly due to the conspicuous difference in sporangia size, even through Taiwan’s isolate exhibiting higher ITS identity to the latter, while blasting the NCBI GenBank database.
Phylum：Zygomycota >> Class： Zygomycetes >> Order： Mucorales 
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