Phylum:Zygomycota >> Class: Zygomycetes >>  Order: Mucorales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Utharomyces epallocaulus

Basionym: Utharomyces epallocaulus Boedijn, Sydowia 12: 342. 1959, nomen invalidum . 1959.

Utharomyces epallocaulus Boedijn ex Kirk & Benny, Trans. Br. mycol. Soc. 75: 123-131. 1980.

 Description: Colonies on corn meal agar (CMA) growing rapidly, filling the Petri dish (9 cm) in 10 days at 24°C, turf composed entirely of sporangiophores without aerial mycelium. Trophocysts forming under the agar medium surface, light brown, broadly ellipsoid to ovoid, with granular cytoplasm. Sporangiophores 12-13 µm diam, originating from trophocysts, at first erect and ascending, later recumbent, up to 2 cm or more in length. Mature sporangia hemispherical, flattened near the base, dark brown to black, wall echinulate, 32.5-75.0 µm high by 42.4-112.5 µm wide, not easily to break. Subsporangial vesicles broadly ellipsoid, transparent, thin walled, 50-118 µm high by 42.5-60 µm wide. The subsporangial stalk 22.5- 42.5 µm in length, 6.25-12.5 µm diam below the sporangium, becoming wider downward, 7.5-25 µm diam immediately above the subsporangial vesicle, dark brown, wall thickened upon maturity. When the sporangium contacted with a surface, the thin subsporagnial vesicle collapsed and affixed in place the upper half of the vesicle, upon which the subsporangial stalk and sporangium are attached. Columellae obovate, narrower near the base, thin-walled and readily collapsing, 30,1-67.5 µm high by 17.4-64 µm wide. Sporangiospores doliiform, subhyaline, 6.3-7.5 µm diam, 4.4-5.5 µm thick. Zygospores not observed.

DFI0101, isolated from frog dung from Fusan, Yilan county, Jan. 2001; DWH0101, from lizard dung from Hsintin, Taipei County, May, 2002; DMML0102, from mouse dung from MiaoLi, April, 2002.

 Habitat: null

Ghana; India; Indonesia; Mexico; Taiwan; USA.


Boedijn, KB. 1959; Chien, CY. 1994; Kirk, PM. & GL. Benny. 1980.


H. M. Ho

 Note: This genus composed of only one species. It is easy to be identified by the distinct characters such as black, hemispherical sporangia; transparent subsporangial vesicles and the long sporangiophores.