Results 31 to 40 of about 1,108 (163)

Metric variation in the postcranial skeleton of ostriches,Struthio(Aves: Palaeognathae), with new data on extinct subspecies [PDF]

Zoological Journal of the Linnean Society, 2021
AbstractAs a result of numerous fossil and subfossil finds of ostriches, there is great demand for a comprehensive osteometric dataset for the living species and subspecies of the genus Struthio. We meet this demand by providing a set of > 100 measurements for a sample of 18 sexed skeletons, including all living and recently extinct species and ...
Elzanowski, Andrzej, Louchart, Antoine
openaire   +3 more sources

Avian cerebellar floccular fossa size is not a proxy for flying ability in birds [PDF]

, 2013
Extinct animal behavior has often been inferred from qualitative assessments of relative brain region size in fossil endocranial casts. For instance, flight capability in pterosaurs and early birds has been inferred from the relative size of the ...
Abel, Richard L., Barrett, Paul M., Bourdon, Estelle, Dello Sterpaio, Patricia, Iwaniuk, Andrew N., Knoll, Monja A., Milner, Angela C., Nudds, Robert L., Walsh, Stig A.   +8 more
core   +16 more sources

Different solutions lead to similar life history traits across the great divides of the amniote tree of life

Journal of Biological Research - Thessaloniki, 2021
Amniote vertebrates share a suite of extra-embryonic membranes that distinguish them from anamniotes. Other than that, however, their reproductive characteristics could not be more different. They differ in basic ectothermic vs endothermic physiology, in
Shai Meiri, Gopal Murali, Anna Zimin, Lior Shak, Yuval Itescu, Gabriel Caetano, Uri Roll   +6 more
doaj   +1 more source

New Avian Hepadnavirus in Palaeognathous Bird, Germany

Emerging Infectious Diseases, 2017
In 2015, we identified an avian hepatitis B virus associated with hepatitis in a group of captive elegant-crested tinamous (Eudromia elegans) in Germany. The full-length genome of this virus shares
Wendy K. Jo, Vanessa M. Pfankuche, Henning Petersen, Samuel Frei, Maya Kummrow, Stephan Lorenzen, Martin Ludlow, Julia Metzger, Wolfgang Baumgärtner, Albert Osterhaus, Erhard van der Vries   +10 more
doaj   +1 more source

Quantification of congruence among gene trees with polytomies using overall success of resolution for phylogenomic coalescent analyses

Cladistics, Volume 39, Issue 5, Page 418-436, October 2023., 2023
Abstract Gene‐tree‐inference error can cause species‐tree‐inference artefacts in summary phylogenomic coalescent analyses. Here we integrate two ways of accommodating these inference errors: collapsing arbitrarily or dubiously resolved gene‐tree branches, and subsampling gene trees based on their pairwise congruence.
Mark P. Simmons, Pablo A. Goloboff, Ben C. Stöver, Mark S. Springer, John Gatesy   +4 more
wiley   +1 more source

New view on the organization and evolution of Palaeognathae mitogenomes poses the question on the ancestral gene rearrangement in Aves

BMC Genomics, 2020
Background Bird mitogenomes differ from other vertebrates in gene rearrangement. The most common avian gene order, identified first in Gallus gallus, is considered ancestral for all Aves.
Adam Dawid Urantówka, Aleksandra Kroczak, Paweł Mackiewicz   +2 more
doaj   +1 more source

Evolution of posture in amniotes–Diving into the trabecular architecture of the femoral head

Journal of Evolutionary Biology, Volume 36, Issue 8, Page 1150-1165, August 2023., 2023
We use 3D microanatomical parameters measured at the femoral head to study femoral posture in amniotes. We show that these parameters are not good indicators of femoral posture. Methods of ancestral state reconstruction hold great promise for improving our understanding of the evolution of posture in amniotes.
Jordan Gônet, Michel Laurin, John R. Hutchinson   +2 more
wiley   +1 more source

Quantitative analysis of stem-palaeognath flight capabilities sheds light on ratite dispersal and flight loss. [PDF]

Biol Lett
Lithornithids are an assemblage of Palaeogene fossil birds thought to represent stem-group members of Palaeognathae. Among extant palaeognaths, which include flightless ratites such as ostriches, only tinamous can fly, though only in anaerobic bursts ...
Widrig K, Alfieri F, Kuo PC, James H, Field DJ.   +4 more
europepmc   +3 more sources

Cyrioctea (Araneae, Zodariidae) in Africa: temperate Gondwanaland relict, recent radiation, or both? [PDF]

, 2013
Two new species of the zodariid genus Cyrioctea Simon, 1889 are described: C. sawadee sp. nov. and C. lotzi sp. nov., both only known from males. The genus now contains seven Afrotropical species and this abundance is discussed in the context of its ...
Jocqué, Rudy C.A.M.
core   +2 more sources

The influence of fossils in macroevolutionary analyses of 3D geometric morphometric data: A case study of galloanseran quadrates

Journal of Morphology, Volume 284, Issue 6, June 2023., 2023
Fossils provide important information regarding the ancestral morphologies of major clades, but they are rarely incorporated into geometric morphometric estimates of ancestral morphologies. In this study, we assess the influence of fossils on estimates of the ancestral geometry of the quadrate in galloanseran birds.
Pei‐Chen Kuo, Roger B. J. Benson, Daniel J. Field   +2 more
wiley   +1 more source