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paleontology
214 downloads
1,161 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
197 downloads
1,598 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
85 downloads
417 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
148 downloads
2,808 views

Haasgat is a primate-rich fossil locality in the northeastern part of the Fossil Hominid Sites of South Africa UNESCO World Heritage Site. Here we report the first hominin identified from Haasgat, a partial maxillary molar (HGT 500), that was recovered from an...

["Anthropology","Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.2024
201 downloads
910 views

Despite the increasing rate of systematic research on scarabaeine dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae), their fossil record has remained largely unrevised. In this paper, we review all 33 named scarabaeine fossils and describe two new species from...

["Entomology","Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.1988
198 downloads
926 views

Pliosauridae is a globally distributed clade of aquatic predatory amniotes whose fossil record spans from the Lower Jurassic to the Upper Cretaceous. However, the knowledge of pliosaurid interrelationships remains limited. In part, this is a consequence of a few...

["Paleontology","Taxonomy"]
doi:10.7717/peerj.1998
22 downloads
87 views

Homalozoa are a weird group of echinoderms, for their complete lack of radiate symmetry. Indeed, they are typified by their tendency to marked asymmetric body forms. It has been proposed that they asymmetric forms evolved from bilaterally symmetric ones, but so...

["Developmental Biology","Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.2009v1
750 downloads
3,072 views

The early evolution of archosauromorphs during the Permo-Triassic constitutes an excellent empirical case study to shed light on evolutionary radiations in deep time and the timing and processes of recovery of terrestrial faunas after a mass extinction. However,...

["Evolutionary Studies","Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.1778
59 downloads
344 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:10.7287/peerj.preprints.2004v1
64 downloads
467 views

Pleurocystitid rhombiferans are among the most unusual echinoderms whose mode of life has been long debated. These echinoderms are usually interpreted as vagile epibenthic echinoderms, moving over the sea bottom by means of a flexible stem. Although their life...

["Ecology","Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.1820
84 downloads
358 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:10.7287/peerj.preprints.1952v2
125 downloads
657 views

The Drimolen Palaeocave System Main Quarry deposits (DMQ) are some of the most prolific hominin and primate-bearing deposits in the Fossil Hominids of South Africa UNESCO World Heritage Site. Discovered in the 1990s, excavations into the DMQ have yielded a demographically...

["Anthropology","Paleontology"]
doi:10.7717/peerj.1941
349 downloads
1,373 views

The cranial and postcranial anatomy of the basal hadrosaurid dinosaur Eotrachodon orientalis, from the uppermost Santonian of southern Appalachia (southeastern U.S.A.), is described in detail. This animal is the only known pre-Campanian non-lambeosaurine hadrosaurid,...

["Paleontology","Taxonomy","Zoology","Histology"]
doi:10.7717/peerj.1872
190 downloads
721 views

A second species of Yuanansuchus, Y. maopingchangensis, is erected for new temnospondyl material from the Maopingchang site, Yuanan County, Hubei Province, China. These specimens are from the same horizon that produced Y. laticeps, the type species. Y. maopingchangensis...

["Paleontology"]
doi:10.7717/peerj.1903
103 downloads
296 views

Aetosaurs are some of the most common fossils collected from the Upper Triassic Chinle Formation of Arizona, especially at the Petrified Forest National Park. Four partial skeletons collected from the park from 2002 through 2009 represent the holotype and referred...

["Paleontology"]
doi:10.7287/peerj.preprints.1924v1

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