Phylogeny of Paleozoic limbed vertebrates reassessed through revision and expansion of the largest published relevant data matrix

PeerJ, Journal Year: 2019, Volume and Issue: 6, P. e5565 - e5565

Published: Jan. 4, 2019

The largest published phylogenetic analysis of early limbed vertebrates (Ruta M, Coates MI. 2007.

Language: Английский

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Bufadienolides from amphibians: A promising source of anticancer prototypes for radical innovation, apoptosis triggering and Na+/K+-ATPase inhibition

Toxicon, Journal Year: 2017, Volume and Issue: 127, P. 63 - 76

Published: Jan. 7, 2017

Language: Английский

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An Updated Review of the Middle‐Late Jurassic Yanliao Biota: Chronology, Taphonomy, Paleontology and Paleoecology

Acta Geologica Sinica - English Edition, Journal Year: 2016, Volume and Issue: 90(6), P. 2229 - 2243

Published: Dec. 1, 2016

Abstract The northeastern Chinese Yanliao Biota (sometimes called the Daohugou Biota) comprises numerous, frequently spectacular fossils of non‐marine organisms, occurring in Middle‐Upper Jurassic strata western Liaoning, northern Hebei, and southeastern Inner Mongolia. biota lasted for about 10 million years, divided into two phases: Bathonian‐Callovian phase (about 168–164 years ago) Oxfordian Linglongta (164–159 ago). are often taphonomically exceptional (many vertebrate skeletons, example, complete accompanied by preserved integumentary features), not only taxonomically diverse but also include oldest known representatives many groups plants, invertebrates, vertebrates. These have provided significant new information regarding origins early evolution such clades as fleas, birds, mammals, addition to some major biological structures feathers, demonstrated existence a complex terrestrial ecosystem northeast China around time Middle‐Late boundary.

Language: Английский

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Vertebrate assemblages of the Jurassic Yanliao Biota and the Early Cretaceous Jehol Biota: Comparisons and implications

Palaeoworld, Journal Year: 2017, Volume and Issue: 26(2), P. 241 - 252

Published: Jan. 22, 2017

Language: Английский

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The locomotion of extinct secondarily aquatic tetrapods

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2021, Volume and Issue: 97(1), P. 67 - 98

Published: Sept. 6, 2021

ABSTRACT The colonisation of freshwater and marine ecosystems by land vertebrates has repeatedly occurred in amphibians, reptiles, birds mammals over the course 300 million years. Functional interpretations fossil record are crucial to understanding forces shaping these evolutionary transitions. Secondarily aquatic tetrapods have acquired a suite anatomical, physiological behavioural adaptations locomotion water. However, much this information is lost for extinct clades, with evidence often restricted osteological data few extraordinary specimens soft tissue preservation. Traditionally, functional morphology secondarily was investigated through comparative anatomy correlation living analogues. last two decades, biomechanics palaeobiology experienced remarkable methodological shift. Anatomy‐based approaches increasingly rigorous, informed quantitative techniques analysing shape. Moreover, incorporation physics‐based methods enabled objective tests hypotheses, revealing importance hydrodynamic as drivers innovation adaptation. Here, we present an overview latest research on tetrapods, focus amniotes, highlighting state‐of‐the‐art experimental used field. We discuss suitability exploring different aspects locomotory adaptation, their advantages limitations laying out recommendations application, aim inform future strategies. Furthermore, outline some unexplored avenues that been successfully deployed other areas palaeobiomechanical research, such use dynamic models feeding mechanics terrestrial locomotion, thus providing new synthesis field vertebrates. Advances imaging technology three‐dimensional modelling software, developments robotics, increased availability awareness numerical like computational fluid dynamics make exciting time form function ancient

Language: Английский

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Middle Jurassic fossils document an early stage in salamander evolution

Proceedings of the National Academy of Sciences, Journal Year: 2022, Volume and Issue: 119(30)

Published: July 11, 2022

Salamanders are an important group of living amphibians and model organisms for understanding locomotion, development, regeneration, feeding, toxicity in tetrapods. However, their origin early radiation remain poorly understood, with fossil stem-salamanders so far represented by larval or incompletely known taxa. This poor record also limits the Lissamphibia (i.e., frogs, salamanders, caecilians). We report fossils from Middle Jurassic Scotland representing almost entire skeleton enigmatic stem-salamander Marmorerpeton. use computed tomography to visualize high-resolution three-dimensional anatomy, describing morphologies that were characterized including braincase, scapulocoracoid, lower jaw. these data context a phylogenetic analysis intended resolve relationships stem-salamanders, representation outgroups alongside imaging extant species. Marmorerpeton is united Karaurus, Kokartus, others Jurassic-Lower Cretaceous Asia, providing evidence robustly built neotenous stem-salamanders. These taxa display morphological specializations similar cryptobranchid "giant" salamanders. Our demonstrates stem-group affinities larger sample species than previously recognized, highlighting unappreciated diversity cautioning against single (e.g., Karaurus) as exemplars anatomy. findings, combined knowledge near-complete skeletal anatomy Mamorerpeton, advance our evolutionary changes on salamander stem-lineage provide salamanders origins Batrachia Lissamphibia.

Language: Английский

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A new hynobiid-like salamander (Amphibia, Urodela) from Inner Mongolia, China, provides a rare case study of developmental features in an Early Cretaceous fossil urodele

PeerJ, Journal Year: 2016, Volume and Issue: 4, P. e2499 - e2499

Published: Oct. 5, 2016

A new fossil salamander, Nuominerpeton aquilonaris (gen. et sp. nov.), is named and described based on specimens from the Lower Cretaceous Guanghua Formation of Inner Mongolia, China. The discovery documents a far northern occurrence Early salamanders in China, extending geographic distribution for Mesozoic record group Jehol area (40th–45th parallel north) to near 49th north. salamander characterized by having orbitosphenoid semicircular shape; coracoid plate scapulocoracoid greatly expanded with convex ventral posterior border; ossification two centralia carpus tarsus; first digit being about half length second both manus pes. appears be closely related hynobiids, although this inferred relationship awaits confirmation research progress us morphological molecular combined analysis cryptobranchoid relationships. Comparison adult larval postmetamorphic juvenile provides insights into developmental patterns cranial postcranial skeletons species, especially resorption palatine anterior portions palatopterygoid palate coronoid mandible during metamorphosis, mesopodium Thus, study rare case features salamander.

Language: Английский

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Temporal framework for the Yanliao Biota and timing of the origin of crown mammals

Earth and Planetary Science Letters, Journal Year: 2023, Volume and Issue: 617, P. 118246 - 118246

Published: June 12, 2023

Establishing the temporal sequence of Middle-Late Jurassic Yanliao Biota is essential as it anchors timing many key evolutionary innovations in vertebrates. Lack sufficiently reliable high-precision ages fossil-bearing horizons hinders our ability to reconstruct tempo and mode vertebrate evolution. Here, we frame a with precise age constraints for iconic vertebrates, proposing that major vertebrate-bearing strata span from 164 Ma 157 age. The increasing ecological diversity mammaliaforms well illustrated by Early Cretaceous Jehol Biota. Incorporation updated frameworks Bayesian tip-dated mammaliaform phylogeny reveals Triassic haramiyidans are separate taxa unrelated crown Mammalia. Tip-dated supports long-fuse model mammal evolution, featured Late root interordinal diversification Mammalia, showing consistency molecular-based timetrees divergence timing.

Language: Английский

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What can anomalies of the axial skeleton of newts say about homeotic transformations?

Zoomorphology, Journal Year: 2025, Volume and Issue: 144(1)

Published: Jan. 4, 2025

Language: Английский

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Anatomy of the Critically‐Endangered Anji Salamander (Hynobius amjiensis) Provides New Insights Into Morphological Evolution of Salamanders

Journal of Morphology, Journal Year: 2025, Volume and Issue: 286(2)

Published: Jan. 29, 2025

ABSTRACT The Anji Salamander ( Hynobius amjiensis ) is a critically‐endangered amphibian endemic to the Tianmushan Mountain area in southeastern China. As most of its congeneric species ancestral salamander family Hynobiidae, osteology H . has remained essentially unknown and hampered efforts understanding morphological evolutionary patterns early salamanders. Here, we investigate skeletal anatomy based on microcomputed tomography scans post‐metamorphosed juvenile adult specimens. Our results reveal Hynobiidae more early‐tetrapod‐like plesiomorphic characters than expected, as stapedial foramen middle ear two centralia centrale‐radius contact limb. We demonstrate that first known living with whose absence was believed unite salamanders anurans, hence opens major questions evolution modern amphibians: if some caecilians had inherited from their common ancestor, when how many times lost independently amphibians, did this structural loss impact phylogenetic clades? findings hyper‐ossified pectoral pelvic girdles postminimus pes functional features hynobiids are potentially informative phylogeny ontogeny

Language: Английский

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