Peer-reviewed Articles

54 downloads
300 views

New Pleistocene fossilized turtle remains from five localities of western Ecuador (Santa Elena Province) are described here. All these shell (carapace and plastron) fossil remains come from the Tablazo Formation and belong to three different lineages of cryptodires...

["Biodiversity","Evolutionary Studies","Paleontology","Taxonomy","Histology"]
doi:10.7717/peerj.3215
33 downloads
294 views

Background Zones of contact between closely related taxa with divergent migratory routes, termed migratory divides, have been suggested as areas where hybrid offspring may have intermediate and inferior migratory routes, resulting in low fitness of hybrids and...

["Animal Behavior","Evolutionary Studies"]
doi:10.7717/peerj.3201
110 downloads
792 views

Metoposaurids are temnospondyl amphibians that are commonly recovered from the Chinle Formation deposits of North America. Two species, Koskinonodon perfectus and Apachesaurus gregorii, are known from Petrified Forest National Park (PEFO), AZ. Small, elongate intercentra...

["Evolutionary Studies","Paleontology","Taxonomy","Histology"]
doi:10.7717/peerj.3183
115 downloads
714 views

The evolution of herbivory in early tetrapods was crucial in the establishment of terrestrial ecosystems, although it is so far unclear what effect this innovation had on the macro-evolutionary patterns observed within this clade. The clades that entered this under-filled...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.3200
268 downloads
987 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:10.7717/peerj.3119
58 downloads
400 views

Background The capacity of visually oriented species to perceive and respond to visual signal is integral to their evolutionary success. Giraffes are closely related to okapi, but the two species have broad range of phenotypic differences including their visual...

["Bioinformatics","Evolutionary Studies","Genomics"]
doi:10.7717/peerj.3145
81 downloads
378 views

The Clustered Regularly Interspaced Short Palindromic Repeats associated (CRISPR-Cas) systems consist of RNA-protein complexes that provide bacteria and archaea with sequence-specific immunity against bacteriophages, plasmids, and other mobile genetic elements....

["Biochemistry","Bioinformatics","Evolutionary Studies","Microbiology"]
doi:10.7717/peerj.3161
222 downloads
1,800 views

Rare hybridisations between deeply divergent animal species have been reported for decades in a wide range of taxa, but have often remained unexplained, mainly considered chance events and reported as anecdotal. Here, we combine field observations with long-term...

["Ecology","Evolutionary Studies","Zoology"]
doi:10.7717/peerj.3072
112 downloads
412 views

This study explores how curvature in the quokka femur may help to reduce bending strain during locomotion. The quokka is a small wallaby, but the curvature of the femur and the muscles active during stance phase are similar to most quadrupedal mammals. Our hypothesis...

["Computational Biology","Evolutionary Studies","Zoology"]
doi:10.7717/peerj.3100
228 downloads
1,157 views

The patella is a sesamoid bone located in the major extensor tendon of the knee joint, in the hindlimb of many tetrapods. Although numerous aspects of knee morphology are ancient and conserved among most tetrapods, the evolutionary occurrence of an ossified patella...

["Evolutionary Studies","Palaeontology","Zoology","Anatomy and Physiology"]
doi:10.7717/peerj.3103
62 downloads
500 views

Video playback is becoming a common method for manipulating social stimuli in experiments. Parid tits are one of the most commonly studied groups of wild birds. However, it is not yet clear if tits respond to video playback or how their behavioural responses should...

["Animal Behavior","Ecology","Evolutionary Studies"]
doi:10.7717/peerj.3062
81 downloads
413 views

The Iberian Peninsula has an extensive record of species displaying strong genetic structure as a result of their survival in isolated pockets throughout the Pleistocene ice ages. We used mitochondrial and nuclear sequence data to analyze phylogeographic patterns...

["Conservation Biology","Evolutionary Studies"]
doi:10.7717/peerj.3069
70 downloads
375 views

The hypothesis that oxidative damage accumulation can mediate the trade-off between reproduction and lifespan has recently been questioned. However, in captive conditions, studies reporting no evidence in support of this hypothesis have usually provided easy access...

["Ecology","Evolutionary Studies"]
doi:10.7717/peerj.3094
189 downloads
409 views

The land snails collected by the ‘Comisión Científica del Pacifíco’ (CCP), a Spanish expedition to South and Central America from 1862–1866, are restudied and revised. The historical context of the expedition and the study of its collected material are described....

["Biogeography","Evolutionary Studies","Taxonomy","Zoology"]
doi:10.7717/peerj.3065
182 downloads
941 views

Background Ancient protein sequences are increasingly used to elucidate the phylogenetic relationships between extinct and extant mammalian taxa. Here, we apply these recent developments to Middle Pleistocene bone specimens of the rhinoceros genus Stephanorhinus....

["Bioinformatics","Evolutionary Studies","Molecular Biology","Paleontology"]
doi:10.7717/peerj.3033

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