Phylum:Zygomycota >> Class: Zygomycetes >>  Order: Endogonales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Peridiospora spinosa

Peridiospora spinosa Wu & Lin, sp. nov.

 Description: Zygosporae fulvae, cum tunica hypharum intertextarum 2.5-9 μm diam, adpressarum ad spora, usque ad 30 μm crassa. Zygosporae singulae vel aggregatae in solo. Gametangia tenuiter tunicata, ephemera. Zygosporae globosae, subglobosae, 170-220 μm diam; vel ellipsoideae 160-190 × 170-230 μm (cum tunica hypharum). Tunicae sporarum stratis quatuor in turmis duabus: Turma A cum tunica pallide fulvae 1.5-2 μm crassa (Tunica 1). Turma B cum tunica tribus. Tunica 2 & Tunica 3, membranacea 1 m crassa disjuncte; Tuncia 4, amorpha, <0.5 μm crassa. Pagina tunicae unius (Tuncia 1) ornata cum projecturis rotundatis, usque ad 5 m altis. Tunica 4, in solutioni Melzeri pallide rosea. Typus: Wu-830924(TAI). Zygosporocarps borne singly in the soil and containing one zygosporangium. Zygosporangia pale yellow brown, with a mantle of interwoven hyhae appressed to the sporothecium, 2.5-9 μm diam. forming layers of hyphae up to 30 m thick. Gametangia thin-walled and ephemeral. Zygosporangia globose or subglobose 170-220 μm diam.; elliposoid 160-190 × 170-230 μm (including hyphal mantle). Zygosporangium consisting of four walls in two groups. Group A, wall 1, a unit wall, pale yellow brown, 1.5-2 μm thick, bearing round projections up to 5 μm high on surface; Group B, wall 2 & wall 3, membranous, 1 m thick separately; wall 4, amorphous, < 0.5 m thick. Wall 4 reacting to become pale pink in Melzer's reagent. Holotype: Wu-830924(TAI).

TAIWAN: Hualien, Kuan-fu peanut field. HOLOTYPE: From the rhizosphere of Arachis hypogaea L., Wu-830924 (TAI). ISOTYPE: From the rhizosphere of the same host, Wu-84020701 (TAI), Wu-84020702(TAI). TAIWAN: Pingtung, Hsi-chung River. From the rhizosphere of onion (Allium cepa L.), Wu-840327(TAI).

 Habitat: Hypogeous. Spores of Peridiospora spinosa were associated mainly with peanut in Eastern and Western Taiwan, although it was also found in the rhizosphere of onion.





C. G. Wu

 Note: Etymology: Latin, spinosa refers to the spiny spore surface. Peridiospora spinosa is characterized by producing zygospores ornamented with projections. The unique habitat with peanut, ornamented spores and complicate wall structure segregate P. spinosa from the other two species.