Preprints (not yet peer-reviewed)

102 downloads
260 views

Rugose Corals, often referred to as Horn Coral, are an extinct order of stony corals in the phylum Cnidaria. They lived from the Ordivician period to the end of the Permian period, and can be found worldwide. A new fossil of Siphonophrentis gigantea, a species...

["Evolutionary Studies","Marine Biology","Paleontology","Aquatic and Marine Chemistry"]
doi:10.7287/peerj.preprints.27282v2
213 downloads
533 views

The Cretaceous Kem Kem beds of Morocco and equivalent beds in Algeria have produced a rich fossil assemblage, yielding, amongst others, isolated sauropod teeth, which can be used in species diversity studies. These Albian-Cenomanian (~113 – 93.9 Ma) strata rarely...

["Biodiversity","Biogeography","Paleontology","Taxonomy"]
doi:10.7287/peerj.preprints.27286v1
186 downloads
254 views

The Araripe Basin (Northeastern Brazil) has yielded a rich Cretaceous fossil fauna of both vertebrates and invertebrates found mainly in the Crato and Romualdo Formations, of Aptian and Albian ages respectively. Among the vertebrates, the turtles were proved quite...

["Paleontology","Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.27262v1
665 downloads
2,646 views

Bears Ears National Monument (BENM) is a new, landscape-scale national monument jointly administered by the Bureau of Land Management and the Forest Service in southeastern Utah as part of the National Conservation Lands system. As initially designated, BENM encompasses...

["Paleontology","Natural Resource Management"]
doi:10.7287/peerj.preprints.3442v2
707 downloads
1,715 views

The oldest feathers known to date have been found in archosaurs capable to fly. However, some of them (scansoriopterygids) flied by the use of a membrane rather than feathers. We therefore propose a new mechanism for the origin of avian flight by the use of membranous...

["Evolutionary Studies","Paleontology","Zoology"]
doi:10.7287/peerj.preprints.27213v1
213 downloads
487 views

ABSTRACT: The discovery of Paranthropus deyiremeda in 3.3–3.5 million year old fossil sites in Afar, together with 30% of the gorilla genome showing lineage sorting between humans and chimpanzees, and a NUMT (“nuclear mitochondrial DNA segment”) on chromosome 5...

["Anthropology","Evolutionary Studies","Genomics","Paleontology"]
doi:10.7287/peerj.preprints.27163v1
200 downloads
376 views

The use of personal ornaments by Neandertals is one of the scarce evidence of their symbolic behaviour. Among them stand up the eagle talons used presumably as pendants, in an analogous way than anatomically Modern Humans (Homo sapiens) did. Considering the broad...

["Anthropology","Evolutionary Studies","Paleontology","Zoology"]
doi:10.7287/peerj.preprints.27133v1
87 downloads
164 views

Tertiary dentine forms when an odontoblast is directly affected by stimuli, commonly through occlusal wear. In this study the presence of tertiary dentine is recorded in three South African fossil hominin species (Australopithecus africanus, Homo naledi and Paranthropus...

["Anthropology","Ecology","Evolutionary Studies","Paleontology","Dentistry"]
doi:10.7287/peerj.preprints.27115v1
74 downloads
138 views

A conglomerate bed from the Tournaisian Ballagan Formation of Scotland preserves a rich array of vertebrate and other non-marine fossils providing an insight into the wider ecosystem and palaeoenvironment that existed during this pivotal stage of Earth history....

["Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.27102v1
142 downloads
259 views

The Atlantic gray whale (Eschrichtius robustus) presents an interesting case study of climate related dispersal and local extinction. While (limited) fossil records confirm its presence in the Atlantic until the 18th century, its abundance and distribution with...

["Biogeography","Conservation Biology","Ecology","Paleontology"]
doi:10.7287/peerj.preprints.27025v2
1,485 downloads
2,464 views

Synopsis: Tyrannosaurid dinosaurs had larger than predicted preserved leg muscle attachments and low rotational inertia relative to their body mass, indicating that they could turn more quickly than other large theropods. Methods: To compare turning capability...

["Evolutionary Studies","Paleontology","Zoology"]
doi:10.7287/peerj.preprints.27021v1
367 downloads
808 views

Crocodyliformes have undergone few modifications in their morphology since they have emerged. The change in the position of the choana was important during the evolutionary history of this group. Such character is relevant in the phylogenetic position of many crocodyliforms....

["Paleontology"]
doi:10.7287/peerj.preprints.26956v1
994 downloads
1,707 views

It is widely accepted that birds evolved from theropod dinosaurs, and few paleontologists disagree preferring a more ancient split of the avian and dinosaur lineages. The difference in digestive physiology between members of the theropod and crocodile lineages,...

["Evolutionary Studies","Paleontology","Zoology","Anatomy and Physiology"]
doi:10.7287/peerj.preprints.26902v2
73 downloads
260 views

We present two cases of study of ontogenetic allometry in outlines of bivalves using longitudinal data, a rarity among fossils, based on the preserved post-larval record of shells. The examples are two infaunal burrowing bivalves of the southern South America,...

["Evolutionary Studies","Marine Biology","Paleontology","Zoology"]
doi:10.7287/peerj.preprints.26892v1
169 downloads
503 views

Background. Yunnanolepidoids constitute either the basal-most consecutive segments or the most primitive clade of antiarchs, a highly diversified jawed vertebrate group from the Silurian and Early Devonian periods. Although the general morphology of yunnanolepidoids...

["Evolutionary Studies","Paleontology","Zoology"]
doi:10.7287/peerj.preprints.26867v1
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