[3] The type species, Moros intrepidus, was named and described by Lindsay E. Zanno, Ryan T. Tucker, Aurore Canoville, Haviv M. Avrahami, Terry A.

The generic name is derived from the Greek term Moros (an embodiment of impending doom), in reference to the establishment of the tyrannosauroid lineage in North America that would soon dominate the continent by the end of the Cretaceous.

The specific name is the Latin word intrepidus ("intrepid"), referring to the hypothesized dispersal of tyrannosauroids from Asia throughout North America following the arrival of Moros.

[1] In their 2019 phylogenetic analyses, Zanno and colleagues recovered Moros as a basal pantyrannosaurian alongside Asian taxa from the middle of the Cretaceous, such as Xiongguanlong and Timurlengia.

[1] This phylogenetic affinity with Asian basal tyrannosauroids suggests that Moros was part of a transcontinental exchange between the biotas of Asia and North America during the mid-Cretaceous that is well-documented in other taxa.