Ben Creisler
The free pdf of the first paper is now online:
Free pdf:
Sarah C. Hood, Chris R. Torres, Mark A. Norell & Julia A. Clarke (2019)
New Fossil Birds from the Earliest Eocene of Mongolia.
American Museum Novitates 3934:1-24 (2019).
doi: Âhttps://doi.org/10.1206/3934.1
https://bioone.org/journals/American-Museum-Novitates/volume-2019/issue-3934/3934.1/New-Fossil-Birds-from-the-Earliest-Eocene-of-Mongolia/10.1206/3934.1.short
New Fossil Birds from the Earliest Eocene of Mongolia.
American Museum Novitates 3934:1-24 (2019).
doi: Âhttps://doi.org/10.1206/3934.1
https://bioone.org/journals/American-Museum-Novitates/volume-2019/issue-3934/3934.1/New-Fossil-Birds-from-the-Earliest-Eocene-of-Mongolia/10.1206/3934.1.short
Free pdf link:
On Fri, Aug 9, 2019 at 11:07 AM Ben Creisler <bcreisler@gmail.com> wrote:
Ben CreislerRecent non-dino papers:Sarah C. Hood, Chris R. Torres, Mark A. Norell & Julia A. Clarke (2019)
New Fossil Birds from the Earliest Eocene of Mongolia.
American Museum Novitates 3934:1-24 (2019).
doi: Âhttps://doi.org/10.1206/3934.1
https://bioone.org/journals/American-Museum-Novitates/volume-2019/issue-3934/3934.1/New-Fossil-Birds-from-the-Earliest-Eocene-of-Mongolia/10.1206/3934.1.short
NOTE: The paper should be posted in open access at the AMNH link in the near future:Understanding of the Asian early Paleogene avifauna is limited relative to that of North American and European avifauna of the same period. While major patterns of mammalian faunal exchange among these three regions across the Paleocene/Eocene boundary have been described, much less is known about the dynamics of bird diversity over the same time interval. Here, we report bird fossils from the earliest Eocene Bumban Member of the Naranbulag Formation in central Mongolia that add to the known record from Asia from just after this boundary. Most of this material, collected by the joint American Museum of Natural History/ Mongolia Academy of Sciences expeditions, is referable to a previously described taxon in Presbyornithidae (Anseriformes). However, five isolated elements are identified as comprising at least four species from at least three other major avian clades. While further inclusive phylogenetic analyses of each of these clades are necessary, the new remains represent possible earliest occurrences in Asia of these clades. The material includes a humerus and a furcula from shorebirds (Pan-Charadriiformes), a quadrate from a stem member of the flamingo-grebe lineage (Pan-Mirandornithes), and a coracoid from a stem galliform (Pangalliformes). We also report a humerus with uncertain phylogenetic affinities but with similarities to core Gruiformes. These new fossils expand our knowledge of the Asian avifauna during this time and have the potential to further inform our understanding of the early biogeography of these clades. The shorebird and flamingo-grebe material indicate that both these lineages were present in Asia by the earliest Eocene. The pan-mirandornithine quadrate provides insight into the early feeding ecology of the flamingo-grebe clade.===Pavel P. Skutschas, Valentina D. Markova, Veniamin V. Kolchanov, Alexander O.Averianov, Thomas Martin, Rico Schellhorn, Petr N. Kolosov, Dmitry V. Grigoriev, Dmitry D. Vitenko, Ekaterina M. Obraztsova & Igor G. Danilov (2019)
Basal turtle material from the Lower Cretaceous of Yakutia (Russia) filling the gap in the Asian record.
Cretaceous Research (advance online publication)
doi: https://doi.org/10.1016/j.cretres.2019.07.016
https://www.sciencedirect.com/science/article/pii/S019566711930134X
This paper describes fragmentary turtle material (isolated basisphenoid, shell bones, humerus and ilium) from the Lower Cretaceous (BerriasianâBarremian) Teete locality in Yakutia (Eastern Siberia, Russia). All the material is attributed to one taxon of basal turtles (Mesochelydia indet.), based on the morphology of the basisphenoid, shell bones and humerus, as well as microanatomy and histology of the shell bones and humerus. Canals and foramina of the basisphenoid of this taxon revealed by CT scanning show an unusual pattern, which allows various interpretations and suggests a higher diversity of carotid and/or vidian systems in basal turtles than hitherto believed. Mesochelydia indet. from Teete fills an Early Cretaceous gap in the record of Asian basal turtles and represents the northernmost Asian non-marine turtle occurrence of the Mesozoic. All in all, the record of Asian basal turtles appears to be wider geographically and more complete temporally than previously thought. The Asian basal turtles are represented by at least three phylogenetic lineages: primitive Testudinata in the Late Triassic, primitive Mesochelydia from the Early Jurassic to the Early Cretaceous and primitive Perichelydia from the Middle Jurassic to the Late Cretaceous. The presence of such a primitive (Jurassic level) turtle in Teete supports the hypothesis that the vast territory of Siberia was a refugium for Jurassic vertebrate faunal elements. Details of the external morphology and histology of the Teete turtle material as well as its high paleolatitude occurrence argue in favor of its aquatic lifestyle.