An unusual 'shovel-billed' dinosaur with trophic specializations from the early Campanian of Trans-Pecos Texas, and the ancestral hadrosaurian crest

We describe a new genus and species of hadrosaurid dinosaur, Aquilarhinus palimentus, from the lower shale member of the Aguja Formation (lower Campanian) of Big Bend National Park, south-western Texas. This species is characterized by several autapomorphies of the facial skeleton and mandible, incl...

Descripción completa

Detalles Bibliográficos
Autores: Prieto-Márquez, Albert|||0000-0002-4836-4052, Wagner, Jonathan R.|||0009-0003-4907-190X, Lehman, Thomas
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:213095
Acceso en línea:https://ddd.uab.cat/record/213095
https://dx.doi.org/urn:doi:10.1080/14772019.2019.1625078
Access Level:acceso abierto
Palabra clave:Dinosauria
Hadrosauridae
Phylogeny
Evolution
Cretaceous
North America
id ES_47607cba737ebbb101a35fbf565ab7fe
oai_identifier_str oai:ddd.uab.cat:213095
network_acronym_str ES
network_name_str España
repository_id_str
spelling An unusual 'shovel-billed' dinosaur with trophic specializations from the early Campanian of Trans-Pecos Texas, and the ancestral hadrosaurian crestPrieto-Márquez, Albert|||0000-0002-4836-4052Wagner, Jonathan R.|||0009-0003-4907-190XLehman, ThomasDinosauriaHadrosauridaePhylogenyEvolutionCretaceousNorth AmericaWe describe a new genus and species of hadrosaurid dinosaur, Aquilarhinus palimentus, from the lower shale member of the Aguja Formation (lower Campanian) of Big Bend National Park, south-western Texas. This species is characterized by several autapomorphies of the facial skeleton and mandible, including a crest composed of broadly arched nasals. Notably, the symphyseal processes of the dentary are elongated and reflected dorsally, causing the dentaries to meet with a 'W'-shaped anterior profile. A hypothesized shovel-shaped 'bill', associated with widening of the skull, in A. palimentus might have been used in shovelling out and scooping up semiaquatic vegetation. This animal is otherwise superficially similar to kritosaurins like Gryposaurus but differs in the retention of key plesiomorphic character states in the maxilla and jugal. Phylogenetic analysis reveals Aquilarhinus to be a non-saurolophid hadrosaurid allied to Latirhinus from the late Campanian of Mexico, which bears a similar broadly arched nasal. The recognition of this lineage adds to the diversity of non-saurolophid hadrosaurids and points to the existence of a hitherto unknown diversity of 'duck-billed' dinosaurs outside of the saurolophine-lambeosaurine radiation. Cranial crests were ancestral for early hadrosaurids and evolved before the saurolophid radiation. Ancestrally, crests were 'solid', and consisted of arched nasals. These were retained among kritosaurins and subsequently modified into the diverse crest morphologies observed among derived saurolophines. Lambeosaurine 'hollow-crested' crest morphology departed from the ancestral, 'solid-crested' pre-saurolophid condition early following the origin of that clade.Universitat Autònoma de Barcelona 22019-01-0120192019-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/213095https://dx.doi.org/urn:doi:10.1080/14772019.2019.1625078reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengMinisterio de Economía y Competitividad https://doi.org/10.13039/501100003329 RYC-2015-17388Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 CGL2016-73230-Popen accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2130952026-06-06T12:50:31Z
dc.title.none.fl_str_mv An unusual 'shovel-billed' dinosaur with trophic specializations from the early Campanian of Trans-Pecos Texas, and the ancestral hadrosaurian crest
title An unusual 'shovel-billed' dinosaur with trophic specializations from the early Campanian of Trans-Pecos Texas, and the ancestral hadrosaurian crest
spellingShingle An unusual 'shovel-billed' dinosaur with trophic specializations from the early Campanian of Trans-Pecos Texas, and the ancestral hadrosaurian crest
Prieto-Márquez, Albert|||0000-0002-4836-4052
Dinosauria
Hadrosauridae
Phylogeny
Evolution
Cretaceous
North America
title_short An unusual 'shovel-billed' dinosaur with trophic specializations from the early Campanian of Trans-Pecos Texas, and the ancestral hadrosaurian crest
title_full An unusual 'shovel-billed' dinosaur with trophic specializations from the early Campanian of Trans-Pecos Texas, and the ancestral hadrosaurian crest
title_fullStr An unusual 'shovel-billed' dinosaur with trophic specializations from the early Campanian of Trans-Pecos Texas, and the ancestral hadrosaurian crest
title_full_unstemmed An unusual 'shovel-billed' dinosaur with trophic specializations from the early Campanian of Trans-Pecos Texas, and the ancestral hadrosaurian crest
title_sort An unusual 'shovel-billed' dinosaur with trophic specializations from the early Campanian of Trans-Pecos Texas, and the ancestral hadrosaurian crest
dc.creator.none.fl_str_mv Prieto-Márquez, Albert|||0000-0002-4836-4052
Wagner, Jonathan R.|||0009-0003-4907-190X
Lehman, Thomas
author Prieto-Márquez, Albert|||0000-0002-4836-4052
author_facet Prieto-Márquez, Albert|||0000-0002-4836-4052
Wagner, Jonathan R.|||0009-0003-4907-190X
Lehman, Thomas
author_role author
author2 Wagner, Jonathan R.|||0009-0003-4907-190X
Lehman, Thomas
author2_role author
author
dc.contributor.none.fl_str_mv Universitat Autònoma de Barcelona
dc.subject.none.fl_str_mv Dinosauria
Hadrosauridae
Phylogeny
Evolution
Cretaceous
North America
topic Dinosauria
Hadrosauridae
Phylogeny
Evolution
Cretaceous
North America
description We describe a new genus and species of hadrosaurid dinosaur, Aquilarhinus palimentus, from the lower shale member of the Aguja Formation (lower Campanian) of Big Bend National Park, south-western Texas. This species is characterized by several autapomorphies of the facial skeleton and mandible, including a crest composed of broadly arched nasals. Notably, the symphyseal processes of the dentary are elongated and reflected dorsally, causing the dentaries to meet with a 'W'-shaped anterior profile. A hypothesized shovel-shaped 'bill', associated with widening of the skull, in A. palimentus might have been used in shovelling out and scooping up semiaquatic vegetation. This animal is otherwise superficially similar to kritosaurins like Gryposaurus but differs in the retention of key plesiomorphic character states in the maxilla and jugal. Phylogenetic analysis reveals Aquilarhinus to be a non-saurolophid hadrosaurid allied to Latirhinus from the late Campanian of Mexico, which bears a similar broadly arched nasal. The recognition of this lineage adds to the diversity of non-saurolophid hadrosaurids and points to the existence of a hitherto unknown diversity of 'duck-billed' dinosaurs outside of the saurolophine-lambeosaurine radiation. Cranial crests were ancestral for early hadrosaurids and evolved before the saurolophid radiation. Ancestrally, crests were 'solid', and consisted of arched nasals. These were retained among kritosaurins and subsequently modified into the diverse crest morphologies observed among derived saurolophines. Lambeosaurine 'hollow-crested' crest morphology departed from the ancestral, 'solid-crested' pre-saurolophid condition early following the origin of that clade.
publishDate 2019
dc.date.none.fl_str_mv 2
2019-01-01
2019
2019-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/213095
https://dx.doi.org/urn:doi:10.1080/14772019.2019.1625078
url https://ddd.uab.cat/record/213095
https://dx.doi.org/urn:doi:10.1080/14772019.2019.1625078
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 RYC-2015-17388
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 CGL2016-73230-P
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869407290565591040
score 15,300719

Similares en LA Referencia