Open Paleo

Glishades

Prieto-Márquez, 2010 glee-SHAY-deez Nomen dubium

Concealed in mud; from Latin glis (mud) and Greek Hades (lord of the underworld, meaning unseen), referring to being found in sedimentary strata

83.6–72.2 million years ago Campanian, Late Cretaceous
Late Cretaceous stages

Glishades is a genus of hadrosauroid dinosaur that lived in the Late Cretaceous in North America. It is based on AMNH 27414, two partial premaxillae discovered in the Upper Cretaceous rocks of the upper Two Medicine Formation in Montana, dated to about 74.5 million years ago. Cladistic analysis conducted by Prieto-Márquez suggests that Glishades is a non-hadrosaurid hadrosauroid, probably a sister taxon to Bactrosaurus johnsoni. The type species is Glishades ericksoni. In 2012, Campione and colleagues suggest the holotype specimen of Glishades might actually be an indeterminate juvenile saurolophine hadrosaurid and consider it to be a nomen dubium.

Under dispute

Glishades ericksoni was described as a non-hadrosaurid hadrosauroid (Prieto-Márquez, 2010) but Campione and colleagues (2012) refer the holotype to an indeterminate juvenile saurolophine and regard the name as a nomen dubium.

Species

Glishades ericksoni Prieto-Márquez, 2010 Nomen dubium

Type species

Named for Gregory M. Erickson, an American paleontologist recognized for work on archosaur paleobiology.

Holotype
AMNH 27414 , American Museum of Natural History
Material
Partial left and right premaxillae.
Horizon
Two Medicine Formation, Campanian, Late Cretaceous , 83.6–72.2 million years ago
Locality
South Milk River, 30 miles west of Sweetgrass, Montana, United States Brown, Kaisen and Johnson collected the holotype around 1915, and Campione and colleagues (2012) record that its exact locality is unknown.

References

  1. Prieto-Márquez, A. (2010). Glishades ericksoni, a new hadrosauroid (Dinosauria: Ornithopoda) from the Late Cretaceous of North America. Zootaxa 2452(1). Magnolia Press. doi:10.11646/zootaxa.2452.1.1 prieto-márquez2010a
  2. Jones, B. (2026). The Princeton Encyclopedia of Dinosaurs: Ornithischians. Princeton University Press.

    Treats Glishades as a nomen dubium.

    jones2026a
  3. Campione, N. E.; Brink, K. S.; Freedman, E. A.; McGarrity, C. T.; Evans, D. C. (2012). Glishades ericksoni, an indeterminate juvenile hadrosaurid from the Two Medicine Formation of Montana: implications for hadrosauroid diversity in the latest Cretaceous (Campanian-Maastrichtian) of western North America. Palaeobiodiversity and Palaeoenvironments 93(1): 65-75. Springer Science and Business Media LLC. doi:10.1007/s12549-012-0097-1

    Referred the Glishades holotype to an indeterminate juvenile saurolophine and regarded the name as a nomen dubium.

    campione2012a