Rapid neck elongation in Sauropterygia (Reptilia: Diapsida) revealed by a new basal pachypleurosaur from the Lower Triassic of China.
Body plan
Eosauropterygia
Marine reptile
Mesozoic
Nanzhang-Yuan’an Fauna
Journal
BMC ecology and evolution
ISSN: 2730-7182
Titre abrégé: BMC Ecol Evol
Pays: England
ID NLM: 101775613
Informations de publication
Date de publication:
31 08 2023
31 08 2023
Historique:
received:
05
12
2022
accepted:
16
08
2023
medline:
1
9
2023
pubmed:
31
8
2023
entrez:
30
8
2023
Statut:
epublish
Résumé
Neck elongation has appeared independently in several tetrapod groups, including giraffes and sauropod dinosaurs on land, birds and pterosaurs in the air, and sauropterygians (plesiosaurs and relatives) in the oceans. Long necks arose in Early Triassic sauropterygians, but the nature and rate of that elongation has not been documented. Here, we report a new species of pachypleurosaurid sauropterygian, Chusaurus xiangensis gen. et sp. nov., based on two new specimens from the Early Triassic Nanzhang-Yuan'an Fauna in the South China Block. The new species shows key features of its Middle Triassic relatives, but has a relatively short neck, measuring 0.48 of the trunk length, compared to > 0.8 from the Middle Triassic onwards. Comparative phylogenetic analysis shows that neck elongation occurred rapidly in all Triassic eosauropterygian lineages, probably driven by feeding pressure in a time of rapid re-establishment of new kinds of marine ecosystems.
Identifiants
pubmed: 37648992
doi: 10.1186/s12862-023-02150-w
pii: 10.1186/s12862-023-02150-w
pmc: PMC10469986
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
44Informations de copyright
© 2023. BioMed Central Ltd., part of Springer Nature.
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