[D] Eolambia caroljonesa [Su] [sG] [T]
Describer
Kirkland, 1998
Time
Cretaceous Early Cretaceous Late Albian Cenomanian
Classification
Ornithischia Ornithopoda Hadrosauridae Lambeosaurinae
Diet
Herbivore
Fossilsite
Upper Cedar Mountain Formation, Mussentuchit Wash, Emery County, Utah, US
Info
Genus - Typespecies - Skull
Eolambia caroljonesa (Kirkland, 1998) > Eohadrosaurus caroljonesi (Kirkland, 1997)
The most primitive known lambeosaurine hadrosaurid. Skull enad postcranial elements os several individuals juvenile to adult, at least eight juvenile skeletons of Eolambia caroljonesa were discovered.
Kirkland, J. I. , 1998. \\\\\\\"A New Hadrosaurid from the Upper Cedar Mountain Formation (Albian Cenomanian: Cretaceous) of Eastern Utah the oldest known hadrosaurid (Lambeosaurine ?),\\\\\\\" in Lucas, Kirkland, & Estep, J. W. , eds., 1998: 283-295. This one describes the new genus and species Eolambia caroljonesa (whichmust be emended to Eolambia caroljonesae, with proper Latin feminine possessive ending on species epithet). Also noted in this paper is apreviously published Nomen Nudem for this taxon, \\\\\\\"Eohadrosaurus caroljonesi,\\\\\\\" which appeared in Kirkland\\\\\\\'s article on the Cedar Mountain formation in Currie & Padian\\\\\\\'s dinosaur encyclopedia.
Holoype
CEUM 5258 paratypes: CEUM5212, 27749 and 24389 Additional material: OMNH 28919, 28511, 27749, 04202
Phylogenetic analysis of Eolambia by Head (2001) let the author determine that Eolambia does not form a monophyletic relationship with Lambeosaurinae and should be also excluded from the Hadrosauridae.
Maxwell and Cifelli (2002) reported on new matrial from the Mussenttuchit Member of the Cedar Mountain Formation, Utah, consiting out of atleast 11 Eolamia individuals, according to the authors virtually every element of the appendicular skeleton of Eolambia is now known.
Bird, Burge and Cicconetti (2002) reported briefly on multiple disarticulated specimens, representing juvenile Eolambia individuals of varying sizes, from a bone bed in a lacustrine deposit of eastern Utah\\\\\\\'s Cedar Mountain Formation.
Carpenter & Ishida (2010) Early and “Middle” Cretaceous Iguanodonts in Time and Space Journal of Iberian Geology 36 (2) 145-164
Eolambia caroljonesa Kirkland 1998b
Locality
eastern Utah, USA.
Horizon
Mussentuchit Member, Cedar Mountain Formation.
Age
early Cenomanian (Garrison et al., 2007).
Comments
Known from several localities in the Mussentuchit. The ilium has a deep body, triangular postacetabular process with a lateral iliac crest, but no lateral process. The preacetabular process angles sharply down. The ischial peduncle is primitive, having to lateral expansion onto the lateral surface.
Kirkland, 1998
Time
Cretaceous Early Cretaceous Late Albian Cenomanian
Classification
Ornithischia Ornithopoda Hadrosauridae Lambeosaurinae
Diet
Herbivore
Fossilsite
Upper Cedar Mountain Formation, Mussentuchit Wash, Emery County, Utah, US
Info
Genus - Typespecies - Skull
Eolambia caroljonesa (Kirkland, 1998) > Eohadrosaurus caroljonesi (Kirkland, 1997)
The most primitive known lambeosaurine hadrosaurid. Skull enad postcranial elements os several individuals juvenile to adult, at least eight juvenile skeletons of Eolambia caroljonesa were discovered.
Kirkland, J. I. , 1998. \\\\\\\"A New Hadrosaurid from the Upper Cedar Mountain Formation (Albian Cenomanian: Cretaceous) of Eastern Utah the oldest known hadrosaurid (Lambeosaurine ?),\\\\\\\" in Lucas, Kirkland, & Estep, J. W. , eds., 1998: 283-295. This one describes the new genus and species Eolambia caroljonesa (whichmust be emended to Eolambia caroljonesae, with proper Latin feminine possessive ending on species epithet). Also noted in this paper is apreviously published Nomen Nudem for this taxon, \\\\\\\"Eohadrosaurus caroljonesi,\\\\\\\" which appeared in Kirkland\\\\\\\'s article on the Cedar Mountain formation in Currie & Padian\\\\\\\'s dinosaur encyclopedia.
Holoype
CEUM 5258 paratypes: CEUM5212, 27749 and 24389 Additional material: OMNH 28919, 28511, 27749, 04202
Phylogenetic analysis of Eolambia by Head (2001) let the author determine that Eolambia does not form a monophyletic relationship with Lambeosaurinae and should be also excluded from the Hadrosauridae.
Maxwell and Cifelli (2002) reported on new matrial from the Mussenttuchit Member of the Cedar Mountain Formation, Utah, consiting out of atleast 11 Eolamia individuals, according to the authors virtually every element of the appendicular skeleton of Eolambia is now known.
Bird, Burge and Cicconetti (2002) reported briefly on multiple disarticulated specimens, representing juvenile Eolambia individuals of varying sizes, from a bone bed in a lacustrine deposit of eastern Utah\\\\\\\'s Cedar Mountain Formation.
Carpenter & Ishida (2010) Early and “Middle” Cretaceous Iguanodonts in Time and Space Journal of Iberian Geology 36 (2) 145-164
Eolambia caroljonesa Kirkland 1998b
Locality
eastern Utah, USA.
Horizon
Mussentuchit Member, Cedar Mountain Formation.
Age
early Cenomanian (Garrison et al., 2007).
Comments
Known from several localities in the Mussentuchit. The ilium has a deep body, triangular postacetabular process with a lateral iliac crest, but no lateral process. The preacetabular process angles sharply down. The ischial peduncle is primitive, having to lateral expansion onto the lateral surface.