Circinella umbellata van Tieghem & Le Monnier, Ann. Sci. Nat., ser. V.17: 300, Pl. XXI, Figs. 18-23. 1873.
Description：
Colonies on PDA at 24℃ at first white, later dark gray, becoming brown with age, with aerial mycelium. Short branched rhizoid-like structures form where sporangiophore touches the surface of the medium. Sporangial colonies usually present. Sporangiophores up to 25 μm in diam. and over 2 cm in height, hyaline to light brown with pigmentation and roughening near the sporangia. Sporangia singly or in umbels of up to 14 on short circinate and often bi-septate stalks. These umbels are produced from successive branching along the sporangiophores, and sometimes terminate the sporangiophores. Sporangia at first hyaline then turn to black in reflected light, and light brown in transmitted light, spherical or dorsiventrally flattened, usually 45-70 μm up to 85 μm. Sporangial wall persistent when breaking. Columellae smooth, pyriform, measuring 30-38 μm × 50-63 μm, with a collar. Sporangiospores globose to short oval, 6.0-7.5 μm.
Specimens：
D00401, from deer dung, Ken-Ting National Park, Pingtung, July 1995; D00201, from rabbit dung, Campus of The Affiliated Senior High School of National Taiwan Normal Univ., Taipei, March 1993. (leg. C. H. Chung).
Habitat：
null
Distribution：
Australia; China; France; Germany; Holland; India; Java; Taiwan; USA.
References：
Hesseltine CW. and Fennell, DI. 1955; Ho, HM.1995; Zycha, H. et al. 1969.
Provided：
H. M. Ho
Note：
This fungus has been reported and isolated from rabbit dung in Taipei. This species is recognized by the sporangia produced on umbels of at least 8 or 10 in a umbel. The specimens examined in this study are confirmed with the previous descriptions except in that the sporangiospores are not clearly ridged as described by Little and Young (1987).
Phylum：Zygomycota >> Class： Zygomycetes >> Order： Mucorales 
BCRC Number：