These Chlorophytes are collected from a freshwater body in Thiruvananthapuram.
a) Cosmarium sp- 26x22 μm (LXB).
b) Desmodesmus sp- 6x2 μm (LXB). Polar spines 3-4.6 μm in length.
c) Pediastrum sp - 50-52 μm in diameter; marginal cells 13-16.5 μm long, 8-10 μm broad; inner cells 12.5-14.5 μm long, 9.5-13.5 μm broad.
d) Tetrastrum sp- 3-6 μm in diameter, colony 7-14 μm wide, setae 4-5 μm long.
Thanks in Advance
Anila Ajayan
Hello Anila,
I have the same idea as you and all the algae identified by you are correct.
Regards.
Dear Reza, Thank you.
What I actually need is the species level identification. :)
These conjectures might be true:
Cosmarium nymannianum
Pediastrum gracillium
But I have no idea about Desmodesmus sp. and Tetrastrum sp.
Hello. What about the idea of Pediastrum duplex var gracillium and Cosmarium hammeri var protuberances???
Dear Anila
I think it will be very very difficult and almost impossible for anybody to identify up to species level with just viewing one picture. If you add more pics with the scale, you will have lots of experts here to identify.
Regards
Dear Aparna,
Here is my identification of your images b) and d):
"b" is Desmodesmus bicaudatus (Dedusenko) Tsarenko 2000
"d" is Tetrastrum staurogeniaeforme (Schroder) Lemmermann 1900
Good luck!
Dear Anila,
The above suggestions could be good, but I also agree that determination on the species level based on one image can be difficult. As for the names, I suggest that you check the currently accepted ones in AlgaeBase (http://www.algaebase.org/).
Dear Dr Jackson,
Thank you for your kind reply. Tetrastrum staurogeniforme is my opinion too.
But how about Desmodesmus intermedius var.acuminatus.
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