Can anybody recommend papers with the image of Protobothrops tokarensis palatine bone and with the detailed image of Deinagkistrodon acutus skull?

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James M. Long

Have you checked out Digimorph?

http://digimorph.org/listbygroup.phtml?grp=Lizards,%20S&sort=SpeciesName

Pavel B. Snetkov

Unfortunately, these species are absent here. Pictures of some close species I have seen in some Chinese publications but not these.

Gordon W Schuett

UC Berkeley has a large collection of viperid skulls. You might want to entertain the idea of having them shoot a quick but functional digital pic of their specimens. At a minimun they can probably help you locate where osteo specimens of these species are deposited. Good luck!

Shohei Komaki

Studies on the terrestrial snakes in the Ryukyu Archipelago

http://ir.lib.u-ryukyu.ac.jp:8080/bitstream/123456789/23110/7/No9p001_3.pdf

There are images of skull of tokarensis.

Thank you!!