Phylum:Zygomycota >> Class: Trichomycetes >>  Order: Eccrinales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Enteropogon formosensis

Enteropogon formosensis C.Y. Chien & L.H. Hsieh 2001.

 Description: Four thallus types. First thallus type 69-251 long by 7.5-12 μm diam, terminal cell oar-shaped by 9-15 μm diam, proximal thalli evenly lobed or slightly asymenetrically expanded by 6-33 μm diam, and hold fast cell 1.5-6 × 4.5-9 μm. Secondary infestation spore differiated under the oar-shaped cell, producing thin-walled, uninucleate, obval 5-7 μm diam, square 7.5-12 × 6-7.5 μm or binucleate, thin-walled 21 × 9 μm. Attached to the cuticle of foregut or midgut, especially in midgut exuvium, two adjacent thalli fused in pair by the smaller and the larger spores to form uni- or binucleate spheres 9-18 μm diam. The second thallus type rarely found in the midgut of exuvia. Mature thalli 90-168 × 10.5-15 μm, proximal thalli strongly expanded asymmetrically, by 15-42 μm diam, producing ellipsoidal, thick-walled primary infestation sporangiospores 18-21 × 9-15 μm holdfast 7.5-15 × 3-7.5 μm. Third thallus type adjunct anterior rectum, very abundant, most thalli 800-2500 μm long, in exuvium up to 3.2 mm and by 6-15 μm diam. Secondary infestation sporangiospores binucleate 10.8-37.5 × 6-15 μm, quadrinucleate 75-132 × 6-10.5 μm, Base thallus prodominently inflated unilaterally, boot-shaped and protruding portion 6-36 × 9-21 μm, cell wall expanded. In exuvium, proximal portion strongly expanded up to 24 μm, than shrinking along thallus wide as Fourth thallus type, but enlarged at the terminal and producing uninucleate, square spores 21-24 × 15-18 μm, the end spore slightly contracted and with an empty sporangium. Fourth thallus type with third type, mature thalli up to 3.5 μm by 5-8 μm diam producing thick-walled, uninucleate spores 6-9 × 5-8 μm, the tip usually with an empty sporangium.

Taiwan, Changhua: Lukang, 30 Nov 1991, SH51SQ07, SH51SH10. Changhua: Shenkong, 01 Mar 1992, SH57SQ04, SH57SQ07, SH57SQ10, SH57SQ12, SH57SQ13, SH57SQ14 (Holotype), SH57SQ16, SH57SQ17.

 Habitat: Upogebia edulis Ngoc-Ho and Cham (Crustacea, Thalassinidea, Upogebiidae).



Chien, CY and Hsieh, LH. 2001.


C. Y. Chien and L. H. Hsieh

 Note: The monotypic Enteropogon was established by Hibbits (1978) for the multiple thallus forms each in a specific area of hindgut cuticle and scalariform fusion phenomenon. The single species E. sexuale was found in the hindgut of Upogebia pugettensis Dana, and the host of E. formosensis belongs to genus Upogebia which is a newly described species – U. edulis (Ngoc-Ho & Cham). E. formosensis attaches to the whole gut cuticle and forms four thallus types. The cells fusion between adjacent thalli was also observed and thick-walled primary infestation sporangiospores newly found in the midgut of an exuvium.