Results 71 to 80 of about 720 (168)

Figure 1. Palaeognathae phylogenies published 2007–2010. A in New morphological evidence supports congruent phylogenies and Gondwana vicariance for palaeognathous birds

, 2011
Figure 1. Palaeognathae phylogenies published 2007–2010. A, nuclear genomic (Harshman et al., 2008); B, mitochondrial genomic (Phillips et al., 2010); C, mitochondrial genomic (Baker & Pereira, 2009); D, morphological (Bourdon et al., 2009); E ...
Johnston, Peter
core   +1 more source

Ultraviolet light illuminates species-specific biofluorescent casque patterns in cassowaries (Casuarius)

Scientific Reports
Cassowaries possess prominent keratinous and bony cranial ornaments, called casques, which have been suggested to function in visual signaling. Despite possessing vividly colored head and neck skin, casque keratin appears dull, which has abated the ...
Todd L. Green, Akinobu Watanabe, Jonathan M. Berman, Michael C. Granatosky, Paul M. Gignac   +4 more
doaj   +1 more source

The Lithornithiformes (Aves) from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK)

Papers in Palaeontology, Volume 11, Issue 1, January/February 2025.
Abstract We describe multiple partial skeletons and isolated bones of the palaeognathous Lithornithiformes from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK). The well‐preserved specimens are assigned to at least four species of the taxa Lithornis and Pseudocrypturus. Two species of Lithornis are identified as L. nasi and L.
Gerald Mayr, Andrew C. Kitchener
wiley   +1 more source

Circulating miRNAome of avian influenza‐infected ruddy turnstones Arenaria interpres

Journal of Avian Biology, Volume 2025, Issue 1, January 2025.
MicroRNAs (miRNAs) are highly conserved small noncoding RNAs that regulate gene expression post‐transcriptionally. Circulating miRNAs – miRNAs that have been released from cells and circulate in the bloodstream – are relatively stable and interesting molecules for wildlife research, where they may form a proxy for gene expression as a function of the ...
Anne‐Fleur Brand, Courtney A. Waugh, Jorge M. O. Fernandes, Marcel Klaassen, Michelle Wille, Veerle L. B. Jaspers, Rune Andreassen   +6 more
wiley   +1 more source

How smart was T. rex? Testing claims of exceptional cognition in dinosaurs and the application of neuron count estimates in palaeontological research

The Anatomical Record, Volume 307, Issue 12, Page 3685-3716, December 2024.
Abstract Recent years have seen increasing scientific interest in whether neuron counts can act as correlates of diverse biological phenomena. Lately, Herculano‐Houzel (2023) argued that fossil endocasts and comparative neurological data from extant sauropsids allow to reconstruct telencephalic neuron counts in Mesozoic dinosaurs and pterosaurs, which ...
Kai R. Caspar, Cristián Gutiérrez‐Ibáñez, Ornella C. Bertrand, Thomas Carr, Jennifer A. D. Colbourne, Arthur Erb, Hady George, Thomas R. Holtz Jr, Darren Naish, Douglas R. Wylie, Grant R. Hurlburt   +10 more
wiley   +1 more source

Anatomical description of neornithine stomach with implications on neornithine stomach morphology

Journal of Anatomy, Volume 245, Issue 5, Page 787-796, November 2024.
The representatives of the four neornithine stomach morphotypes proposed in this study. Abstract Neornithines, the most diversified extant tetrapods, have been a classic example for understanding form–function relationships, particularly in the context of the interaction between dietary ecology and neornithine phenotypic evolution.
Ryuji Takasaki, Yoshitsugu Kobayashi
wiley   +1 more source

Paleoneurology of stem palaeognaths clarifies the plesiomorphic condition of the crown bird central nervous system

Journal of Morphology, Volume 285, Issue 6, June 2024.
We describe the nearly complete digital endocasts of the brain and bony labyrinth of the neotype specimen of Lithornis vulturinus, a palaeognathous bird from the early Eocene of Europe. Lithornis may provide the clearest insights to date into the neuroanatomy of the ancestral crown bird, combining an ancestrally unflexed brain with a caudally oriented ...
Klara E. Widrig, Guillermo Navalón, Daniel J. Field   +2 more
wiley   +1 more source

Figure 1 in Comparative ossification sequence and skeletal development of the postcranium of palaeognathous birds (Aves: Palaeognathae)

, 2009
Figure 1. Lateral view of the forelimbs of palaeognath embryos. A–C, Dromaius novaehollandiae: A, stage 35 (RM 8053); B, stage 36 (day 25 of incubation, RM 8023); C, stage 40+ (day 43 of incubation, RM 8039).
Maxwell, Erin E., Larsson, Hans C. E.
core   +1 more source

Comparative digital reconstruction of Pica pica and Struthio camelus and their cranial suture ontogenies

The Anatomical Record, Volume 307, Issue 1, Page 5-48, January 2024.
Abstract To date, several studies describe post‐hatching ontogenetic variation in birds; however, none of these studies document and compare ontogenetic variation of the entire skull in multiple avian species. Therefore, we studied ontogenetic skull variation of two bird species with very different ecologies, Pica pica, and Struthio camelus, using μCT ...
Olivia Plateau, Todd L. Green, Paul M. Gignac, Christian Foth   +3 more
wiley   +1 more source

Phylogenomics and Morphology of Extinct Paleognaths Reveal the Origin and Evolution of the Ratites

, 2017
The Palaeognathae comprise the flightless ratites and the volant tinamous, and together with the Neognathae constitute the extant members of class Aves.
Segawa, Takahiro, Campos, Paula F., Mukoyama, Harutaka, Koike, Hiroko, Hayashi, Yoshihiro, Nogi, Yoshifumi, Kurokawa, Ken, Campos, Paula, Wu, Jiaqi, Endo, Hideki, Tanabe, Hideyuki, Kohno, Naoki, Nishida, Shin, Kishino, Hirohisa, Akiyoshi, Ayumi, Rasoamiaramanana, Armand, Akishinonomiya, Fumihito, Willerslev, Eske, Yonezawa, Takahiro, Yoshida, Kunio, Yamagishi, Satoshi, Hongoh, Yuichi, Jin, Haofei, Adachi, Jun, Hasegawa, Masami, Mori, Hiroshi, Yoshida, Akira   +26 more
core   +1 more source