Monoblepharidales--Key to Families and Genera

 


 

A. Reproducing by dividing within parent cells, not producing motile spores; unbranched thallus

Single species; Hyaloraphidium curvatum Korsh.

 

A. Reproducing sexually and/or by zoospores

a. Reproducing only by zoospores; thalli simple, unbranched....B

a. Reproducing sexually and by zoospores; thalli mycelial.....C

 

B. Zoospores formed in simple thalli; exiting from an apical or subapical pore; sporangia proliferating internally from basal protoplasm

Harpocytriaceae

Single genus; ~9 species; Harpochytrium

 

B. Thalli large, 20 37 m dia , 0.5 - 1 cm long; sporangia formed by division of thalli into segments by cross walls starting at the distal end; thalli not proliferating internally

Oedogoniomycetaceae

Single genus, single species; Oedogoniomyces lymnaeae Kobayashi and Okubo

 

 

C. Hyphae without pseudoseptations

Monoblepharidaceae

a. Mycelium robust (usually 916 m dia); mature oospores remaining inside or at the mouth of the oogonium

810 species; Monoblepharis

 

a. Mycelium finer (17.5 m; typically 23 m dia); oospheres emerging from the oogonium propelled by the flagellum of the partially absorbed male gamete. Fertilization completed and oospore formed at a distance from origin.

5 species; Monoblepharella

 

C. Hyphae pseudoseptate

Gonapodyaceae

One genus; Gonapodya

Two species; G. prolifera (Cornu) Fischer and G. polymorpha Thaxter

 

 

 

 


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zoospore drawing

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