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paleontology
35 downloads
93 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
28 downloads
73 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
14 downloads
39 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
12 downloads
23 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
15 downloads
26 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
16 downloads
29 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
15 downloads
29 views

Background. A well preserved skull reported from the London Clay of the Walton on the Naze in Essex, UK adds an additional record to a rich turtle assemblage from the Eocene (Ypresian-Lutetian) of several depositional basins across NW Europe and North Africa including...

["Paleontology"]
doi:10.7287/peerj.preprints.892v1
227 downloads
506 views

Originally identified as an ornithischian dinosaur, Crosbysaurus harrisae has been found in New Mexico, Arizona, and its type locality in Texas, as well as in North Carolina. The genus has been reassessed by other workers in light of reinterpretations about the...

["Biogeography","Paleontology"]
doi:10.7287/peerj.preprints.537v3
12 downloads
31 views

Background. Condorchelys antiqua is a stem turtle previously described from the Queso Rallado Locality, Cañadón Asfalto Formation (Early-Middle Jurassic), Chubut, Argentina. In 2014 a skull (MPEF-PV 10900) and an articulated shell with associated postcranial remains...

["Evolutionary Studies","Paleontology","Zoology"]
doi:10.7287/peerj.preprints.884v1
186 downloads
555 views

Quantitative morphometric analyses, particularly ontogenetic allometry, are common methods used in quantifying shape, and changes therein, in both extinct and extant organisms. Due to incompleteness and the potential for restricted sample sizes in the fossil record,...

["Evolutionary Studies","Paleontology","Zoology","Statistics"]
doi:10.7717/peerj.818
26 downloads
70 views

Background. Most studies on pleurodiran turtles are about the behavior and/or feeding habits analyzes, description of new taxa or specimens (both extinct and extant), or phylogenetic analyzes of one of its subclades with extant taxa: Chelidae, Pelomedusidae or...

["Paleontology","Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.876v1
12 downloads
21 views

Background. Neochelys franzeni (Schelich, 1993) is the only pleurodire or side-necked turtle from the middle Eocene, Messel Pit (the first UNESCO, World Natural Heritage Site in Germany, since 1995). The original description of the species is based on two specimens...

["Biodiversity","Evolutionary Studies","Paleontology","Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.874v1
27 downloads
55 views

Background. A new podocnemidid taxon from the Adamantina Formation (Campanian to Maastrichtian), Bauru Group - Paraná Basin (southeastern Brazil) is presented. Some multifragmented specimens were discovered near 30 years ago, in the region of Álvarez Machado (State...

["Paleontology","Zoology"]
doi:10.7287/peerj.preprints.873v1
17 downloads
60 views

Background. Solemydidae is an enigmatic clade of stem turtles, which is primarily represented by fragmentary shell material found in Upper Jurassic and Cretaceous deposits of Europe and North America. Specimens are typically identified by a distinct surface ornamentation...

["Paleontology"]
doi:10.7287/peerj.preprints.863v1
21 downloads
49 views

Background. Large-sized testudinids had a long evolutionary history in Europe during the last 50 million years before becoming extinct in the beginning of the Pleistocene. Despite a 150-year long history in research and a decent fossil record, the European large...

["Paleontology"]
doi:10.7287/peerj.preprints.862v1

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