They appear to be charas. how about SEM photos showing different views? pl see attached reference if it is useful. Pl consult any college botany text book for morphological terms and evolution of plants. Take the help of a Prof of Botany if needed.
from microscopic view it appears a sex organ of certain species of Chara. for better reference plz google "samit ray charophytes". u will get several publications. regarding morphometry and chromosomal morphology.
Dear Kumar, is it thallus photograph or zygote of the observed Genus??? I am thinking most of the charophytes are stone worts because silica was deposited on the cell wall of the charales. Further these photos may not be similar to the globule and Nucule of the Chara. You please give details such as morphology of the species, anatomy of the species for further clarity in identification. As you mentioned that samples from subderbans, it is estuarine habitat, Chara baltica is estuarine alga. Before jumping to the conclusion you give above said details.
Thank you Rao sir, actually i am not a biologist but i will try to do what you have suggested. Presently i was doing foraminiferal study from the older mud flats to know the transgressive and regressive phase of sea. So we got several peat layers within the muds. Washed residue of the mud contains maximum number of these type of Charophytes. is it possible to find out the type of plants from which they belongs without doing pollen study?
Dear Sachin,
I agree with Dr. Rao. Even for the species level identification you details of cortcation(which is there for chara but not in Nitella and Nitellopsis. Definitely need the morphological details of the plant and structure and arrangement of globules and nucules etc..
To me the specimen in the photograph appears to be the oospore of Nitella as I can make out around 6 spiral ridges on its surface.
Good luck!
Dear Sir ! I also can identify visually that this is Chara, but in term of species I have no idea.
Sachin Sir, Yes It is charophytes. Image is not very much clear . See the apical , basal and lateral view morphology for identification...
This is most probably Nitella oospore because it is seems to be latterally compressed. Please check this feature. Surface ornamentation surveyed with scanning electron microscope will be useful for species identification.
Kindly go for a Petrological testing of these samples. The picture shows that the sample are bright yellow. It might be FeS2 (Pyrite) also.
Chalcopyrite in general remain associated with Pyrite and Pyrhotite. If you observe any such particle, yellow portion is Pyrite, Light reddish yellow is Chalcopyrite and darker reddish yellow (or you can say brownish yellow) is Pyrhotite. The colour and lusture of minerals also depends on the type of weathering it has faced over the years and so it is always better to go for a petrological analysis.
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