... I just remembered that I have the paper:
Deraniyagala, P.E.P. (1945) Some new races of the python, Chrysopelea, binocellate cobra and Tith Polonga inhabiting Ceylon and India. Spolia Zeylanica, 24: 103 113.
His dichotomous key is as follows:
(a) 62-72 scales at midbody, ventrals 244-254, subcaudals 66-67 - molurus
(b) 63-69 scales at midbody, ventrals 248-257, subcaudals 57-65 - pimbura.
The subcaudal differences look impressive until one realises from further reading that his "pimbura" data are based on 5 specimens, and his "molurus" data on 3, sex undetermined for all. A bit meagre, to put it mildly, although he did at least take the trouble to look at some specimens himself.
If other Indian/Sri Lankan reptiles (e.g., Naja naja, Daboia russelii) are anything to go by, I would suspect that Sri Lankan molurus and S. Indian molurus will be more similar to each other, and more closely related, than N. and S. Indian populations to each other.
Cheers,
Wolfgang
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