How to differentiate Araucariaceae from Cheirolepidiaceae based on epidermal characters?

Chinnappa Chopparapu @Chinnappa-Chopparapu

05 February 2016 1 4K Report

We have in India, Classopollis pollen assigned to Cheirolepidiaceae by many previous workers, but never reported any megafossils of this family. The fossil leaf axes of Brachyphyllum and Pagiophyllum, usually considered under Araucariaceae (Bose and Maheshwari, 1974) are reported from the early Cretaceous of India. What is interesting is, these fossils are usually found to be associated with the sediments, which have yielded Classopollis pollen. But it has been shown that pollen of this type is produced by the Araucariaceae and Cheirolepidiaceae (Srivastava, 1976, Tosolini et al., 2015).

Mike Pole

Hi Chinnappa, have a look at this paper. I reference some other research in that. I think it can be done on features like the papillae.

Cheers

Article Mid-Cretaceous conifers from the Eromanga Basin, Australia

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