I would like to hear your opinion about this "Pseudocosmospora" on Biscogniauxia capnodes.

The sole species of this genus occuring in Biscogniauxia is P. joca (Mycologia 105(5): 1296) and it is reported from Brazilian Amazon and also from Rio Negro Province (northern edge of Patagonia/Argentina) and I found it in the middle (São Paulo State/Brazil). The problem is that the micromorphology doesn't fit with the description provided, in Mycologia, by Herrera et al.
The perithecia are much smaller and the asci and ascospores are also smaller:

                     Herrera et al.                    My specimen (measurements in water)
Perithecia:      375-384 x 317-349           188-264 x 146-222

Asci:               90.7–112.6 x 8.8–11.1      75-90 x 7.5-8.5

Ascospores:     10.9–14 x 6.4–7.7            9.5-12 x 5.5- 7.0

Herrera et al. mention that "perithecia and ascospores of the epitype are larger than those reported in the literature", but I was unable to find an additional description of this fungus and I was wondering if someone could send me a copy of the protologue of Nectria joca (Nectria joca Samuels, Mycol. Pap. 164:21. 1991), and, of course, yours comments.

Thanks in advance,

Dartanha

Christian Lechat, 23-07-2015 06:46

Re : Pseudocosmospora on Biscogniauxia

Dear Dartanha,
here is the description of Nectria joca in Samuels 1991.
Regards,
Christian

• joca-0001.docx

Dartanha Soares, 23-07-2015 21:00

Re : Pseudocosmospora on Biscogniauxia

Hi Christian, and Andrea Romero,
Thank you very much for sending the original description of "Nectria joca".
The micromorphology of my specimen and that of the orignal description fits much better, except for the lenght of the asci.

                  Herreral et al.                Orignal description                 My specimen
Perithecia:   375-384 x 317-349           210-270x180-240             188-264 x 146-222
Asci:           90.7–112.6 x 8.8–11.1       58-68x6.5-8.5                    75-90 x 7.5-8.5
Ascospores: 10.9–14 x 6.4–7.7       (9.3)9.5-11(11.8)x5.6-7(7.4)     9.5-12 x 5.5- 7.0

Now I'm wondering why Herrera et al. chose the epitype with so "deviated" size.

Well, for now I will accept Pseudocosmospora joca, based on the original description, but I think that I need to isolate the fungus and check the anamorph to be sure.
Anyway, thank you very much for the help.
All the best,
Dartanha