Genus
Valid Extinct

Eolambia

Kirkland 1998
Etymology Lambéosaure de l’aurore

Eolambia is a genus of herbivorous hadrosauroid dinosaur from the early Late Cretaceous of the United States. It contains a single species, E. caroljonesa, named by paleontologist James Kirkland in 1998. The type specimen of Eolambia was discovered by Carole and Ramal Jones in 1993; the species name honors Carole. Since then, hundreds of bones have been discovered from both adults and juveniles, representing nearly every element of the skeleton. All of the specimens have thus far been found in Emery County, Utah, in a layer of rock known as the Mussentuchit Member of the Cedar Mountain Formation.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
12
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Eolambia
click to enlarge
Reconstruction and restoration of the skull of Eolambia. (A) Skull reconstruction of Eolambia in left lateral view by the lead author. Bones in white are unknown, bones in dark grey are based primarily upon the adult holotype (CEUM 9758) or paratype (CEUM 5212), and bones in light grey are based primarily upon juvenile elements from the Eo2 and WS8 bonebeds. Sutures and points of contact between bones are marked in black. Scale bar equals 10 cm; scale is calibrated with the dentary of CEUM 9758. (B) Life restoration of the head of Eolambia by Lukas Panzarin. Abbreviations: an, angular; d, dentary; f, frontal; j, jugal; l, lacrimal; mx, maxilla; na, nasal; pd, predentary; pmx, premaxilla; po, postorbital; prf, prefrontal; q, quadrate; qj, quadratojugal; sa, surangular; sq, squamosal. © Lukas Panzarin and Andrew T. McDonald · CC BY 2.5 · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
›
Ornithischia Unranked clade
›
Neornithischia Unranked clade
›
Pyrodontia Unranked clade
›
Cerapoda Unranked clade
›
Ornithopoda Suborder
›
Iguanodontia Infraorder
›
Euiguanodontia Unranked clade
›
Dryomorpha Unranked clade
›
Ankylopollexia Unranked clade
›
Styracosterna Unranked clade
›
Hadrosauriformes Unranked clade
›
Hadrosauroidea Unranked clade
›
Eolambia Genus
Fossil sites 12 geolocated sites
Distribution
Top countries
🇺🇸 United States
12
Geological formations
Cedar Mountain
12
Temporal distribution
Cenomanian (100.5–93.9 Ma)
11
Albian (113.2–100.5 Ma)
1
Species (1)
Eolambia caroljonesa 121 Ma
Images 1
Bibliography
Original description
J. I. Kirkland. 1998. A new hadrosaurid from the upper Cedar Mountain Formation (Albian-Cenomanian: Cretaceous) of eastern Utah - the oldest known hadrosaurid (lambeosaurine?). Lower and Middle Cretaceous Terrestrial Ecosystems, S. G. Lucas, J. I. Kirkland & J. W. Estep (eds.). New Mexico Museum of Natural History and Science Bulletin 14:283-295
Bibliography (4)
A. T. McDonald, J. Bird, and J. I. Kirkland, P. Dodson. 2012. Osteology of the basal hadrosauroid Eolambia caroljonesa (Dinosauria: Ornithopoda) from the Cedar Mountain Formation of Utah. PLoS One 7(10):e45712:1-38 DOI ↗
J. R. Garrison, Jr., D. B. Brinkman, and D. J. Nichols, P. Layer, D. L. Burge, D. Thayn. 2007. A multidisciplinary study of the Lower Cretaceous Cedar Mountain Formation, Mussentuchit Wash, Utah: a determination of the paleoenvironment and paleoecology of the Eolambia caroljonesa dinosaur quarry. Cretaceous Research 28:461-494 DOI ↗
J. I. Kirkland and S. K. Madsen. 2007. The Lower Cretaceous Cedar Mountain Formation, Eastern Utah: the view up an always interesting learning curve. Utah Geological Association Publication 35
J. I. Kirkland. 1998. A new hadrosaurid from the upper Cedar Mountain Formation (Albian-Cenomanian: Cretaceous) of eastern Utah - the oldest known hadrosaurid (lambeosaurine?). Lower and Middle Cretaceous Terrestrial Ecosystems, S. G. Lucas, J. I. Kirkland & J. W. Estep (eds.). New Mexico Museum of Natural History and Science Bulletin 14:283-295