Cretaceous bird from Brazil informs the evolution of the avian skull and brain DOI Creative Commons
Luis M. Chiappe, Guillermo Navalón, Agustín G. Martinelli

et al.

Nature, Journal Year: 2024, Volume and Issue: 635(8038), P. 376 - 381

Published: Oct. 30, 2024

Abstract A dearth of Mesozoic-aged, three-dimensional fossils hinders understanding the origin distinctive skull and brain modern (crown) birds 1 . Here we report Navaornis hestiae gen. et sp. nov., an exquisitely preserved fossil species from Late Cretaceous Brazil. The is toothless large-eyed, with a vaulted cranium closely resembling condition in crown birds; however, phylogenetic analyses recover Enantiornithes, highly diverse clade Mesozoic stem birds. Despite overall geometry quantitatively indistinguishable birds, retains numerous plesiomorphies including maxilla-dominated rostrum, akinetic palate, diapsid temporal configuration, small cerebellum weakly expanded telencephalon. These archaic neurocranial traits are combined bird-like degree flexion bony labyrinth comparable shape to those many but substantially larger. Altogether, emergent cranial shows unprecedented similarity between enantiornithines, groups last sharing common ancestor more than 130 million years ago 2 provides long-sought insight into detailed endocranial morphology phylogenetically crownward Archaeopteryx , clarifying pattern timing by which neuroanatomy living was assembled.

Language: Английский

Whence the birds: 200 years of dinosaurs, avian antecedents DOI Creative Commons
Daniel J. Field, Maria Grace Burton, Juan Benito

et al.

Biology Letters, Journal Year: 2025, Volume and Issue: 21(1)

Published: Jan. 1, 2025

Among the most revolutionary insights emerging from 200 years of research on dinosaurs is that clade Dinosauria represented by approximately 11 000 living species birds. Although origin birds among has been reviewed extensively, recent have witnessed tremendous progress in our understanding deep evolutionary origins numerous distinctive avian anatomical systems. These advances enabled exciting new fossil discoveries, leading to an ever-expanding phylogenetic framework with which pinpoint characteristic features. The present review focuses four notable systems whose Mesozoic history greatly clarified discoveries: brain, kinetic palate, pectoral girdle and postcranial skeletal pneumaticity.

Language: Английский

Citations

1
The Lithornithiformes (Aves) from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK) DOI Creative Commons
Gérald Mayr, Andrew C. Kitchener

Papers in Palaeontology, Journal Year: 2025, Volume and Issue: 11(1)

Published: Jan. 1, 2025

Abstract We describe multiple partial skeletons and isolated bones of the palaeognathous Lithornithiformes from early Eocene London Clay Walton‐on‐the‐Naze (Essex, UK). The well‐preserved specimens are assigned to at least four species taxa Lithornis Pseudocrypturus. Two identified as L. nasi cf. grandei . latter species, which was established for fossils North American Green River Formation, initially monotypic taxon Calciavis , is here considered synonymous with further new tentatively referred Pseudocrypturus described ? P. danielsi gracilipes In previous analyses, lithornithiforms most often resulted sister either Tinamiformes or all crown group Palaeognathae. detail that current morphological evidence conforms best a position these birds outside Palaeognathae discuss previously unrecognized plesiomorphic features foot pelvis, support this phylogenetic placement.

Language: Английский

Citations

0
Cretaceous bird from Brazil informs the evolution of the avian skull and brain DOI Creative Commons
Luis M. Chiappe, Guillermo Navalón, Agustín G. Martinelli

et al.

Nature, Journal Year: 2024, Volume and Issue: 635(8038), P. 376 - 381

Published: Oct. 30, 2024

Abstract A dearth of Mesozoic-aged, three-dimensional fossils hinders understanding the origin distinctive skull and brain modern (crown) birds 1 . Here we report Navaornis hestiae gen. et sp. nov., an exquisitely preserved fossil species from Late Cretaceous Brazil. The is toothless large-eyed, with a vaulted cranium closely resembling condition in crown birds; however, phylogenetic analyses recover Enantiornithes, highly diverse clade Mesozoic stem birds. Despite overall geometry quantitatively indistinguishable birds, retains numerous plesiomorphies including maxilla-dominated rostrum, akinetic palate, diapsid temporal configuration, small cerebellum weakly expanded telencephalon. These archaic neurocranial traits are combined bird-like degree flexion bony labyrinth comparable shape to those many but substantially larger. Altogether, emergent cranial shows unprecedented similarity between enantiornithines, groups last sharing common ancestor more than 130 million years ago 2 provides long-sought insight into detailed endocranial morphology phylogenetically crownward Archaeopteryx , clarifying pattern timing by which neuroanatomy living was assembled.

Language: Английский

Citations

3