Invictarx (meaning "unconquerable fortress") is a monospecific genus of nodosaurid dinosaur from New Mexico that lived during the Late Cretaceous (lower Campanian, 78.5 Ma) in what is now the upper Allison Member of the Menefee Formation. The type and only species, Invictarx zephyri, is known from three isolated, incomplete postcranial skeletons. It was named in 2018 by Andrew T. McDonald and Douglas G. Wolfe. Invictarx shares similarities with Glyptodontopelta from the Naashoibito member of the Ojo Alamo Formation, New Mexico.
Invictarx (meaning "unconquerable fortress") is a monospecific genus of nodosaurid dinosaur from New Mexico that lived during the Late Cretaceous (lower Campanian, 78.5 Ma) in what is now the upper Allison Member of the Menefee Formation. The type and only species, Invictarx zephyri, is known from three isolated, incomplete postcranial skeletons. It was named in 2018 by Andrew T. McDonald and Douglas G. Wolfe. Invictarx shares similarities with Glyptodontopelta from the Naashoibito member of the Ojo Alamo Formation, New Mexico.
== Discovery and naming == thumb|left|Stratigraphic occurrences of Invictarx and other ankylosaurs from New Mexico. In May 2011, an incomplete postcranial skeleton of an ankylosaur was discovered from the upper Allison Member of the Menefee Formation, San Juan Basin by Daniel Williamson. A second incomplete postcranial skeleton was discovered in October 2011 by Andrew T. McDonald while a third specimen was discovered in October 2015 by Keith Brockmann. The specimens were subsequently named and described in 2018 by Andrew T. McDonald and Douglas G. Wolfe.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).