Phylum:Zygomycota >> Class: Zygomycetes >>  Order: Mucorales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Choanephora conjuncta

Choanephora conjuncta Couch, Jour. Elisha Mitchell Sci. Soc. 41:141-150. pl. 8-11. 1925.

 Description: Hyphae 2.8-8.8 µm in diameter. Only “+” strain isolated. Dried weight of “+” strain 0.285 gm after 5 days’ culture. Conidiophores ending in a primary vesicle from which secondary vesicles are produced on short stalks. Secondary vesicles bearing conidia, persisting on the primary vesicle and becoming funnel shape after conidia maturing. Conidia light brown, smooth, 12-22 × 13-18 µm in diameter. Sporangia oval, smooth, light brown, 30-72 µm. Sorangiospores light brown, oval, with appendages on both ends and with striations on the wall, 15-30 × 10-13 µm.

Taiwan, Taipei: from fading flowers of Malvavicus aborens L. 01 and 08 Sep. 1985, strains 031-1, 031, 032, 032-1, 038. Houlong: from fading flowers of Hibiscus rosaesinensis L. var. rubroplenus, 01 Sep. 1985 and 08 Sep. 1985, culture strains 040-1, 040-2, 041, from fading flowers of Hibiscus schizopetalus Hook. f., 01 Sep. 1985 and 08 Sep. 1985, strains 039, from fading flowers of Homordica charantia L., 08 Sep. 1985, strains 043, from fading flowers of Luffa cylindrica (L.) Roem., 01 and 26 Sep. 1985, strains 030-1, 035-1. Tamshui: from fading flowers of Hibiscus tiliaceus L., 03 April 1986, strain 042-2.

 Habitat: Saprobic on fading flowers. On fading flowers of Luffa cylindrical (L.) Roem., Malvavicus aborens L., Hibiscus rosaesinensis L. var. rubroplenus, Hibiscus schizopetalus Hook., Homordica charantia L. and Hibiscus tiliaceus L. from Taiwan.

Warm-temperate to tropical regions, such as: Ameican, Asia, and only from Houlong and Tamshui area of Taiwan.


Wu, ML and Chien, CY. 1980; Wu, ML. 1975.


M. L. Wu

 Note: Choanephora conjuncta Couch, Choanephora infundibulifera (Currey) Sacc. and Choanephora cucurbitarum (Berk. & Rav.) Thaxter, can form zygospores among interspecies (Wu and Chien, 1980). Sizes of zygospores formed from C. conjuncta with C. infundibulifera and C. cucurbitarum were respectively 43-51 × 41-56 µm and 23-65 × 39-61 µm.