Dear Joop!

Sporormiella cylindrospora has spores larger in size ((67)70-80x13-16). And why, for example, is not S. teretispora (ascospores 60-66x10-13)? What confuses you?

Vielen dank Peter.

Joop

Dear Joop.
Regarding the size of the spores of Sporormiella teretispora. 
According to different authors, it is quite different. 60-66 X 10-13 (Ahmed&Cain), 55-67 X 11-14 (Bell), (61.7-) 63.6-68.4 (-69.3) x 01.4-) 11.8-12.3 (-12.8) (Doveri). Mungai et al. give size 66–73.5 × 11–15.5 (as. S. aff. teretispora). Last size is similar to your measurements.
The morphology of the germ slits is also given different. 
Ahmed&Cain: germ slit nearly parallel, in some collections the germ slit is curved at each end;
Doveri: germ slit an imperceptibly oblique to almost parallel, often flexuous; and besides, indicates that germ slits almost parallel. rather than oblique, germ slits.
Mungai et al.: germ slit diagonal, sigmoid to oblique.
In this regard, I would like to ask a question both to you and all my colleagues in this forum.
What do you think, is the morphology of germ slits in some species of Sporormiella a reliable diagnostic sign? How important should it be considered in the identification Sporormiella species?

Check your mail Yulia.

Joop