Dermatosorus Sawada ex L. Ling

Type

Dermatosorus eleocharidis Sawada ex L. Ling on Eleocharis dulcis Trin.

Synonyms

Zundelula Thirum. & Naras.

Description

Sori in ovaries of Cyperaceae, swollen, covered by a peridium that ruptures irregularly revealing the dark mass of spore balls and a ±distinct central columella.

Spore balls composed of a cortex of empty sterile cells and a central mass of numerous fertile spores separated by small empty compartments formed by the reticulate spore wall ornamentation of neighbouring spores.

Spores dark, medium-sized.

Spore germination resulting in phragmobasidia with sessile basidiospores.

Host-parasite interaction by intracellular hyphae coated by an electron-opaque matrix.

Mature septa poreless.

Comments

This genus contains six species, with two represented in Australia. Begerow et al. (2006) used DNA molecular analyses to demonstrate that species of Anthracoidea, Cintractia, Dermatosorus, Farysia, Heterotolyposporium, Moreaua, Planetella, Schizonella, Stegocintractia, Tolyposporium and Trichocintractia formed a monophyletic clade. They considered that Ustilaginales on Cyperaceae and Juncaceae were best placed in the Anthracoideaceae. However, a comprehensive molecular study towards an internal classification of Ustilaginaceae sensu Bauer et al. (1997) has yet to be carried out (Begerow et al., 2006).

Species in Australia
 
Dermatosorus eleocharidis
Dermatosorus schoenoplecti

Key based on host taxonomy
 
On EleocharisDermatosorus eleocharidis
On SchoenoplectusDermatosorus schoenoplecti