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I had a question about the ID of croc teeth from the Solo River, Java, Indonesia. While the bigger tooth is more easily identifiable as Crocodylus siamensis (syn. Crocodylus ossifragus) just on the size and shape, I was unsure about the smaller one. Croc teeth from the Pleistocene deposits (not sure what formation it's called) are usually just sold as Crocodylus ossifragus, but Gavialis bengawanicus also appears to have been present. The smaller tooth does have prominent fluting, but I'm not sure if that's even a distinguishing feature. I haven't really seen a whole lot of Crocodylus teeth, fossil or extant. Not sure if smaller teeth from this region are even identifiable. If anyone has any knowledge of distinguishing gharial from crocodile, help would be appreciated. Measurement in centimeters. Last image here is just a comparison with a Thecachampsa americana (left) from Bone Valley, Florida.

How were there so many mosasaur species in the same place? Niche partitioning. This one looked like a gharial with long interlaced teeth. https://phys.org/news/2020-10-paleontologists-species-mosasaur.amp