User blog comment:Kogath/Monster Hunter Generations Discussion/@comment-24734669-20160305001625/@comment-5020152-20160305022331

This is just a guess, but I think Larinoth = "larynx" and "-oth"

I think that "larynx" refers to the fact that the sauropods are described as having "a unique cry"... and also, the larynx is found in the neck. As for "-oth", it is just a common suffix used in MH (Aptonoth, Plesioth, etc.).