Peer-reviewed Articles

Total of 140 results
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paleontology
201 downloads
990 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
220 downloads
1,069 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
517 downloads
2,220 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
197 downloads
651 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
278 downloads
2,164 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
96 downloads
729 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
225 downloads
1,720 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
189 downloads
2,765 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
453 downloads
672 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
147 downloads
762 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
241 downloads
1,632 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
279 downloads
1,171 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
1 citation
312 downloads
1,821 views

The postcranial anatomy of Crocodyliformes has historically been neglected, as most descriptions are based solely on skulls. Yet, the significance of the postcranium in crocodyliforms evolution is reflected in the great lifestyle diversity exhibited by the group,...

["Evolutionary Studies","Paleontology","Zoology"]
doi:10.7717/peerj.2075
1 citation
269 downloads
2,051 views

We report the first record of a snake from the Cretaceous of northern South America. The remains come from the La Luna Formation (La Aguada Member, Cenomanian of Venezuela) and consist of several vertebrae, which belong to the precloacal region of the vertebral...

["Paleontology"]
doi:10.7717/peerj.2027
119 downloads
608 views

The hypotheses about the origin of the primitive amniotic tarsus are very speculative. Early studies argued that the origin of the astragalus, one of the largest proximal bones in the tarsus of basal amniotes, was produced by either the fusion of two, three, or...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.2036

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