Results 81 to 90 of about 753 (160)

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

Un individuo juvenil de Pterocnemia pennata (Aves, Rheidae) en el Pleistoceno de la Región Pampeana: implicancias ontogenéticas y ambientales

Revista Mexicana de Ciencias Geológicas, 2018
Se da a conocer un individuo juvenil de Pterocnemia pennata (MACN 14780) procedente del Bonaerense (Pleistoceno Tardío temprano) de la localidad de Salto (Partido de Salto), en el norte de la provincia de Buenos Aires (Argentina) constituyendo el ...
Mariana B. J. Picasso, Federico J. Degrange, María Clelia Mosto, Claudia P. Tambussi   +3 more
doaj  

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

080-Investigating Reduction of the Ostrich Forelimb: Palaeognathae (Aves) [PDF]

Palaeognathae is a group of flightless birds classified by the absence of the keeled sternum (breastbone) present in flighted birds. As they diverged from their flighted ancestors, palaeognaths developed cursorial traits such as greater body mass and ...
Marzec, Isabel
core  

Figure 2 in Comparative ossification sequence and skeletal development of the postcranium of palaeognathous birds (Aves: Palaeognathae)

, 2009
Figure 2. Lateral view of the hindlimb and pelvic girdle of palaeognath embryos. A–C, Dromaius novaehollandiae: A, stage 32 (RM 8052); B, stage 36 (day 25 of incubation, RM 8023); C, stage 40+ (day 36 of incubation, RM 8034).
Maxwell, Erin E., Larsson, Hans C. E.
core   +1 more source

Feather SEM images

, 2016
Collection of SEM images used for measuring melanosome shape in Palaeognathae.
Chad M. Eliason (3258306), Shawkey, Matthew D., Matthew D. Shawkey (267103), Eliason, Chad M., Clark, Julia A., Julia A. Clark (3291504)   +5 more
core   +1 more source