Invictarx (meaning unconquerable fortress) is a genus of nodosaurid from the Late Cretaceous Menefee Formation of New Mexico. The type and only species is Invictarx zephyri.
Discovery and Naming[]
In May 2011, an incomplete postcranial fossil of an ankylosaur was discovered by Daniel Williamson. A second incomplete postcranial skeleton was discovered in October 2011 by Andrew T. McDonald, and a third specimen was discovered in October 2015 by Keith Brockmann. The three species were prepared and housed at Natural History Museum of Utah in Salt Lake City and Western Science Center, California. The generic name combines invictus (meaning invincible or unconquerable) and arx (meaning fortress), while the specific name is zephyri, meaning "of the western wind", due to the extremely windy conditions at its discovery site.
Description[]
Mcdonald and Wolfe diagnosed it based on the osteoderms exhibiting an overall smooth surface texture, and its osteoderms have almost no rugosity. The dorsal vertebra are incomplete but well-preserved, One of the osteoderms associated with the holotype specimen is identified as a right pectoral or cervical osteoderm based on the pectoral osteoderms of Edmontonia, Panoplosaurus and Glyptodontopelta.The osteoderm is broken, and it is a rectangular shape. The holotype (WSC 16505) is consisted of fragmentary dorsal rib, complete osteoderms, and fragments of it. two specimens (UMNH VP 28350 and UMNH VP 28351) is also assigned to Invictarx.
Classification[]
It is classified as a member of nodosauridae.
Paleoecology[]
It coexisted with Dynamoterror.
Gallery[]
