Halisaurus Jaw A

Still a fantastic jaw piece. And I'm still in the camp of it being Halisaurus walkeri. The position of the posterior teeth does not seem to fit with H.arambourgi. While it does with H. walkeri.

Hi LordTrilobite, thanks for your reply. I've saw the photo in your gallery. Walkeri photos are quite scarce however; do you have any photos of a complete jaw where I can compare the posterior tooth to?

You'll want the original description of the species. It includes a dentary. But it's under the now outdated name Pluridens walkeri. I can't find the pdf right away though.

Okay so I was wrong. I've been informed that the tooth count is not usable as an identifiable feature to judge whether it's H. walkeri or H. arambourgi.

Aparently young H. arambourgi have more teeth and the teeth extend to the back of the dentary. As it grows, it loses some of the teeth in the back. So what you have here, is not H. walkeri, but a younger H. arambourgi.

Thanks for the update! I will update my description accordingly then.