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paleontology

Larger benthic foraminifera (LBF) are an important tool for the biostratigraphy of (sub)tropical shallow marine deposits. In Paleogene the genus Nummulites is an important genus for biostratigraphical zonation schemes. However, classification is Europe centered...

["Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.990v1
203 downloads
389 views

We report a new deltatheroidan mammal from the Upper Cretaceous of Henna, China. The new taxon, Lotheridium mengi, is based on a nearly complete skull and associated lower jaws with full adult dentition. Deltatheroidans are known mostly from fragmentary specimens...

["Paleontology"]
doi:10.7717/peerj.896
58 downloads
60 views

Rothschild (2013) suggested that many of the facial and postcranial scars in tyrannosaurid specimens are in fact caused by claws of the other tyrannosaurids. However, the evidences suggested by Rothschild (2013) are very weak. Tooth marks can have very different...

["Animal Behavior","Ecosystem Science","Paleontology","Zoology","Pathology"]
doi:10.7287/peerj.preprints.980v1
25 downloads
22 views

Background. Crown-Pleurodira (i.e.: Cheloides and Pelomedusoides) possess a side-necked retraction mode with specialized cervical vertebrae (CV) anatomy. Moreover, there are distinctive ecological features among its lineages, as the convergent long neck in species...

["Paleontology","Zoology"]
doi:10.7287/peerj.preprints.973v1
774 downloads
3,953 views

Trace marks on the bones of non-avian dinosaurs may relate to feeding by large carnivores or as a result of combat. Here the cranium and mandible of a specimen of Daspletosaurus are described that show numerous premortem injuries with evidence of healing and these...

["Animal Behavior","Ecology","Paleontology"]
doi:10.7717/peerj.885
3,249 downloads
16,935 views

Diplodocidae are among the best known sauropod dinosaurs. Several species were described in the late 1800s or early 1900s from the Morrison Formation of North America. Since then, numerous additional specimens were recovered in the USA, Tanzania, Portugal, and...

["Paleontology","Taxonomy"]
doi:10.7717/peerj.857
108 downloads
72 views

Background. The genus Megalochelys is the largest known testudinid (family Testudnidae) found from the upper Miocene to lower Pleistocene of India to Indonesian Islands. The maximum length of the shell in this genus has been estimated as up to about 2 m long based...

["Paleontology"]
doi:10.7287/peerj.preprints.961v1
38 downloads
29 views

Background. Moroccan phosphates bed includes fossils of Sauropterygia, Testudines and mosasaurs from the latest Cretaceous (Maastrichitian) to Eocene. Family Bothremydidae (Podocnemidoidea), an extinct side-necked turtle group, has broad diversity in cranial morphology...

["Paleontology","Taxonomy"]
doi:10.7287/peerj.preprints.959v1
24 downloads
77 views

Background. The Trionychoidea were dominant turtles in the Late Cretaceous of Asia and North America. Although Early Cretaceous trionychoids are quite important to reveal their origin and the early evolution, their fossil records are very poor so far. The Lower...

["Paleontology","Taxonomy"]
doi:10.7287/peerj.preprints.949v1
53 downloads
235 views

Triassic vertebrate tracks are known from the beginning of the 19th century and have a worldwide distribution. Several Triassic track ichnoassemblages and ichnotaxa have a restricted stratigraphic range and are useful in biochronology and biostratigraphy. The record...

["Biogeography","Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.933v1
69 downloads
277 views

We describe a Mesozoic fish Paralycoptera sp. (Teleostei: Osteoglossoidei), on the basis of a postcranial skeleton collected from the volcaniclastic mudstones of the Lai Chi Chong Formation of Hong Kong, China. The new finding—representing the city’s first Mesozoic...

["Aquaculture, Fisheries and Fish Science","Evolutionary Studies","Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.865
52 downloads
112 views

We developed a new global turtle matrix using morphological characters to test the age of the turtle crown and to assess the origin and phylogeny of various controversial clades along the turtle stem and within Pan-Cryptodira.We significantly increased both character...

["Biodiversity","Paleontology"]
doi:10.7287/peerj.preprints.926v1
25 downloads
42 views

Background. The Santana Group of Araripe Basin has an important turtle fauna in which five monotypic genera are formally described, all from the Albian Romualdo Formation. Araripemys barretoi is the unique identified species that has been found in the Crato and...

["Paleontology"]
doi:10.7287/peerj.preprints.919v1
30 downloads
36 views

Background. Pelomedusoides turtles are an important group in extant fauna of northern South America, Africa and Madagascar, which have a long fossil record, with numerous records through the Cretaceous, Paleogene, and Neogene in South America. One of high- diversified...

["Evolutionary Studies","Paleontology","Zoology"]
doi:10.7287/peerj.preprints.918v1
26 downloads
41 views

Background. The lower section of the Loncoche Formation (Late Campanian-Early Maastrichtian) outcropping at Ranquil-Có locality (Mendoza province, Argentina) has yielded a rich assemblage of vertebrates that was studied in 1995 by Gonzalez Riga. According to this...

["Paleontology"]
doi:10.7287/peerj.preprints.894v1

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