Triassic paleoclimate and paleofloristic trends of southwestern Gondwana (Argentina)

Pedernera, Tomás Ezequiel; Mancuso, Adriana Cecilia; Ottone, Eduardo G.

doi:10.1016/j.jsames.2022.103852

Cited by 5 publications

(3 citation statements)

References 108 publications

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“…2021; Pedernera et al . 2022), although would not have formed part of the diet of Laurasian rhynchosaurs. These floral changes may relate to major climatic perturbations in the mid‐Carnian, although there is dating uncertainty in many cases (Kustatscher et al .…”

Section: Discussionmentioning

confidence: 99%

Unique dentition of rhynchosaurs and their two‐phase success as herbivores in the Triassic

2023

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Rhynchosaurs were key herbivores over much of the world in the Middle and Late Triassic, often dominating their faunas ecologically, and much of their success may relate to their dentition. They show the unique ankylothecodont mode of tooth implantation, with deep roots embedded in the bone of the jaw and low crowns that were rapidly worn down in use. During growth, the main area of oral food processing, located in the middle and posterior portions of the occlusal surfaces of the jaws, moved posteriorly relative to the anterior tips of the jaws, which curved up. As the maxilla and dentary grew by addition of new bone posteriorly, the dental lamina fed in new teeth at the back of the tooth rows. CT scanning of the holotype skull of Bentonyx sidensis from the Middle Triassic of England reveals previously concealed details of the dentition. Together with new dentary material from the same location, this has enabled us to examine the tooth replacement process and elucidate ontogenetic changes in dentition and jaw morphology as the animals aged. There were major changes in rhynchosaur anatomy and function through their evolutionary history, with the early forms of the Middle Triassic dying out before or during the Carnian Pluvial Episode (233-232 Ma), and the subclade Hyperodapedontinae, with broad skulls and adaptations to chop tough vegetation, subsequently diversifying worldwide in a successful ecological expansion until their global extinction 227-225 Ma.

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Section: Discussionmentioning

confidence: 99%

Unique dentition of rhynchosaurs and their two‐phase success as herbivores in the Triassic

2023

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“…±9 Ma. According to these data, recently Mancuso et al (2021) and Pedernera et al (2022) referred the QdlF Fm to Early to Middle Triassic, and more precisely they constrained the age of the lower unit of the Puesto Viejo Group to Middle Triassic (mid-?upper Anisian to ?mid-?late Ladinian) (see Pedernera et al, 2022, tab. 1) and the RSdlQ Fm to Middle Triassic (?mid-?late Ladinian) to early Late Triassic (?early Carnian) (see Pedernera et al, 2022, fig. 2).…”

Section: Geological Settingmentioning

confidence: 99%

Evidences of Teratology and Mutagenensis in Palynological Assemblages from the Middle Triassic Puesto Viejo Group, San Rafael Depocenter, Argentina. Implications of Volcanism and Regional Environmental Stress

Zabattieri

Gutiérrez

2023

Ameghiniana

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“…The Dicroidium flora (Fig. 2) is abundant and diverse in many sites and localities of Triassic basins (e.g., Morel et al, 2015;Bodnar et al, 2020;Pedernera et al, 2022). They were the first seed plants to appear.…”

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confidence: 99%

Gondwanan Perspectives: Triassic Ecosystems. Paleobiological Aspects and the Context of Recovery From the Great Extinction

Arcucci

Mancuso

2023

AMGH

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Triassic paleoclimate and paleofloristic trends of southwestern Gondwana (Argentina)

Cited by 5 publications

References 108 publications

Unique dentition of rhynchosaurs and their two‐phase success as herbivores in the Triassic

Unique dentition of rhynchosaurs and their two‐phase success as herbivores in the Triassic

Evidences of Teratology and Mutagenensis in Palynological Assemblages from the Middle Triassic Puesto Viejo Group, San Rafael Depocenter, Argentina. Implications of Volcanism and Regional Environmental Stress

Gondwanan Perspectives: Triassic Ecosystems. Paleobiological Aspects and the Context of Recovery From the Great Extinction

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