Is it Chaetophora?

[Juan Martin]

Hello, I´m so happy for getting with this forum. I´m studing epilithic algae from Argentina. I´ve a lot of pictures of algae, if somebody can to help me to identify, I would be so gratefull. the pictures has been took at 40x and 65x.Thanks!

[André]

Hi Juan

Microscopic ,can this Chaetophora be.
The end cells have often a long hyalin hair,multicellular .Have he this?
Cheatophora have pyrenoids : have you see this?
Macroscopic is Chaetophora easily recognizable : The Thalli are forming a green sphérical ,cushion -like, or nodulos mucilage...

[Juan Martin]

Hi André! Thanks for responding. How can I do to see the Pyrenoids? I didn´t see the hyalin hairs, but I will try of watching better. Have you got any idea what another genus may it be?. I took this sample from a cathedral's wall. Regards and thanks you so much!

[André]

Hi Juan

Chaetophora on walls from a cathedral ?? HUm,Hum!!....Chaetophora are freshwater algal !!! ( http://www.lenaturaliste.net/forum/view ... =157&t=741 )
For Pyrenoides an example: http://www.lenaturaliste.net/forum/view ... 157&t=3068

[Juan Martin]

Hi Andre!

There are a lot of chaetophorales in subaereal environment, maybe not Chaetophora. The wall of the cathedral are so humid, and it is possible that freshwater species colonize them. Nevertheless, I think that this species is a Trentepholial, this order is more common in this environment and they are too branched filament forms. What do you think about that?. Furthermore I found in the same sample`s site Physolinum, a genus of Trentepholiales commun in this enviroment.