In 2019, due to poor preservation of holotype specimen, Tusoteuthis was considered likely to be a nomen dubium, and it was proposed that later described species are better to included in genus Enchoteuthis instead.

[1] American paleontologist William N. Logan did not directly explain the etymology of Tusoteuthis when he named it in 1898.

[1] Fossils that are described as Tusoteuthis were found to be preyed on by other animals, especially the many, various predatory fish of the Western Interior Seaway.

A fossil of the predatory aulopiform, Cimolichthys nepaholica, was found with the gladius of T. longa in its gullet.

The back portion of the gladius was in the stomach region, while the mouth of C. nepaholica had remained opened, suggesting that the fish had died in the middle of swallowing the cephalopod, tail first.