Tom Murray's image, identified as Odonteus liebecki seems to have a similar carina:



Maybe we are both wrong.

Ah, seeing your comment after a mere 16 years! I must have missed it at back in 2009. Phil Harpootlian agreed with the ID at the time, but perhaps we were both off-base.
Running through Phil's key (1) that would go to O. thoracicornis based on the carina on the clypeus.
I guess I was looking at Phil's illustrations of major males for those two species. Mine matches his fig. 69, showing Odonteus liebecki, i.e., no large pronotal horns, just ridges. I suppose that character could be variable. Too bad I did not save the specimen and do the dissection.
Edit. I see that I did try to get Phil's attention about your comment back then. Not sure how to resolve this.

Harpootlian (1) notes that the base of the pronotum is "distinctly sinuate" in Odonteus liebecki. That fits this specimen. I don't see that listed in the descriptions of the other similar species.
All for what it's worth!
This specimen is also posted at:
https://www.inaturalist.org/observations/288375090