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paleontology
2 downloads
33 views

Synapsida, the clade including therapsids and thus also mammals, is one of the two major branches of amniotes. Organismal design, with modularity as a concept, offers insights into the evolution of therapsids, a group that experienced profound anatomical transformations...

["Developmental Biology","Evolutionary Studies","Neuroscience","Paleontology","Anatomy and Physiology"]
doi:10.7287/peerj.preprints.2313v1
79 downloads
346 views

The fossil record of dinosaurs from the Early Cretaceous of eastern North America is scant, and only a few sediments to the east of the continent are fossiliferous. Among them is the Arundel Formation of the east coast of the United States, which has produced among...

["Biogeography","Paleontology"]
doi:10.7287/peerj.preprints.2308v1
146 downloads
800 views

Phytosaurs are a clade of large, carnivorous pseudosuchian archosaurs from the Late Triassic with a near cosmopolitan distribution. Their superficial resemblance to longirostrine (long-snouted) crocodylians, such as gharials, has often been used in the past to...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.2251
182 downloads
953 views

The new neopterygian genus Ticinolepis, including two new species T. longaeva and T. crassidens is described from Middle Triassic carbonate platform deposits of the Monte San Giorgio. The anatomy of this fish shows a mosaic of halecomorph and ginglymodian characters...

["Paleontology","Zoology"]
doi:10.7717/peerj.2234
13 downloads
92 views

The snapping turtle species Chelydra serpentina, which has a wide range across North America, is extremely tolerant to cold and even freezing conditions. Here, I describe a single caudal vertebrae referred to Chelydra serpentina from the Late Pleistocene of New...

["Biogeography","Ecology","Paleontology"]
doi:10.7287/peerj.preprints.2281v1
488 downloads
2,088 views

Background: Powered flight is implicated as a major driver for the success of birds. Here we examine the effectiveness of three hypothesized pathways for the evolution of the flight stroke, the forelimb motion that powers aerial locomotion, in a terrestrial setting...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.2159
192 downloads
638 views

The Wukongopteridae is an important pterosaur group discovered from Yanliao Biota, because it combines character states seen in non-pterodactyloid and pterodactyloid pterosaurs. So far, the Wukongopteridae contains three genera: Wukongopterus, Darwinopterus and...

["Paleontology"]
doi:10.7717/peerj.2177
271 downloads
2,147 views

Here we describe three fossil feathers from the Early Cretaceous Santana Formation of the Araripe Basin, Brazil. Feathers are the most complex multiform vertebrate integuments; they perform different functions, occurring in both avian and non-avian dinosaurs. Despite...

["Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.1916
94 downloads
722 views

Enamel patterns on the occlusal surfaces of equid teeth are asserted to have tribal-level differences. The most notable example compares the Equini and Hipparionini, where Equini have higher crowned teeth with less enamel-band complexity and less total occlusal...

["Evolutionary Studies","Paleontology","Statistics"]
doi:10.7717/peerj.2181
216 downloads
1,699 views

Extensive oral processing of food through dental occlusion and orbital mandibular movement is often cited as a uniquely mammalian trait that contributed to their evolutionary success. Save for mandibular translation, these adaptations are not seen in extant archosaurs...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.2132
187 downloads
2,753 views

Raja Ampat is an archipelago of about 1,500 small islands located northwest off the Bird’s Head Peninsula of Indonesia’s West Papua province. It is part of the Coral Triangle, a region recognized as the “epicenter” of tropical marine biodiversity. In the course...

["Biodiversity","Paleontology","Taxonomy"]
doi:10.7717/peerj.2157
452 downloads
666 views

Late Pleistocene groundwater discharge deposits (paleowetlands) in the upper Las Vegas Wash north of Las Vegas, Nevada, have yielded an abundant and diverse vertebrate fossil assemblage, the Tule Springs local fauna (TSLF). The TSLF is the largest open-site vertebrate...

["Biogeography","Ecology","Evolutionary Studies","Paleontology","Taxonomy"]
doi:10.7717/peerj.2151
143 downloads
756 views

The Mongolepidida is an Order of putative early chondrichthyan fish, originally erected to unite taxa from the Lower Silurian of Mongolia. The present study reassesses mongolepid systematics through the examination of the developmental, histological and morphological...

["Evolutionary Studies","Paleontology","Taxonomy","Histology"]
doi:10.7717/peerj.1850
240 downloads
1,627 views

A profound understanding of the influence of trackmaker anatomy, foot movements and substrate properties is crucial for any interpretation of fossil tracks. In this case study we analyze variability of footprint shape within one large theropod (T3), one medium-sized...

["Paleontology"]
doi:10.7717/peerj.2059
278 downloads
1,167 views

Sauropod dinosaurs compose a diversified, well known, and worldwide distributed clade, with a stereotyped body plan: deep trunk, elongated neck and tail, columnar limbs and very small skull. In Brazil, the group is represented by ten formally described Cretaceous...

["Evolutionary Studies","Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.2054

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