Peer-reviewed Articles - Biology

256 downloads
4,102 views

A recent interpretation of the fossil remains of the enigmatic, large predatory dinosaur Spinosaurus aegyptiacus Stromer 1915 proposed that it was specially adapted for a semi-aquatic mode of life—a first for any predatory dinosaur. To test some aspects of this...

["Paleontology","Zoology"]
doi:10.7717/peerj.5409
95 downloads
869 views

Background Tar seep deposits in South America historically are well-known for their rich record of fossil mammals, contrasting with only a few formal reports of reptile remains. Here we report a new snake fauna recovered from two tar pits from Venezuela. The fossil...

["Biogeography","Evolutionary Studies","Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.5402
238 downloads
1,252 views

Crocodyliformes is a group with a broad fossil record, in which several morphological changes have been documented. Among known transformations the most iconic is perhaps the series of changes seen in the structural evolution of the choanae. The change in the position...

["Paleontology"]
doi:10.7717/peerj.5372
192 downloads
1,118 views

The Los Menucos locality in Patagonia, Argentina, bears a well-known ichnofauna mostly documented by small therapsid footprints. Within this ichnofauna, large pentadactyl footprints are also represented but to date were relatively underinvestigated. These footprints...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.5358
78 downloads
1,206 views

The Gondolin palaeokarstic system, located in the UNESCO Fossil Hominids of South Africa World Heritage Site, has been sporadically excavated since the 1970s. Sampling of ex situ dumpsites in 1997 recovered the only two fossil hominin specimens recovered thus far...

["Anthropology","Paleontology"]
doi:10.7717/peerj.5393
294 downloads
3,326 views

We describe a new iguanodontian ornithopod, Choyrodon barsboldi gen. et sp. nov. from the Albian-aged Khuren Dukh Formation of Mongolia based on several partial skeletons interpreted to represent a subadult growth stage based on osteohistological features. This...

["Evolutionary Studies","Paleontology","Taxonomy","Zoology","Histology"]
doi:10.7717/peerj.5300
121 downloads
805 views

Background Amphibians are animals strongly dependent on environmental conditions, like temperature, water accessibility, and the trophic state of the reservoirs. Thus, they can be used in modern palaeoenvironmental analysis, reflecting ecological condition of the...

["Paleontology"]
doi:10.7717/peerj.5267
122 downloads
662 views

Hyperphalangy is a rare condition in extant aquatic turtles, and mainly limited to soft-shelled turtles. Here we report a new freshwater turtle, Jeholochelys lingyuanensis gen. et sp. nov. from the Early Cretaceous Jehol Biota of western Liaoning, China. This new...

["Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.5371
142 downloads
2,742 views

This contribution describes seven new species of fossil stoneflies from Cretaceous Burmese amber, all of which are dedicated to present and past members of the Rolling Stones. Two species—Petroperla mickjaggeri gen. nov. sp. nov. and Lapisperla keithrichardsi gen....

["Entomology","Paleontology","Taxonomy","Freshwater Biology"]
doi:10.7717/peerj.5354
659 downloads
7,916 views

A set of associated left pedal elements of a sauropod dinosaur from the Upper Jurassic Morrison Formation in Weston County, Wyoming, is described here. Several camarasaurids, a nearly complete small brachiosaur, and a small diplodocid have been found at this locality,...

["Biogeography","Paleontology"]
doi:10.7717/peerj.5250
1 citation
526 downloads
2,493 views

We present the first comprehensive review of the present and past shark and ray diversity in marine waters of Tropical America, examining the patterns of distribution in the Eastern Central Pacific (EP) and Western Central Atlantic (WA) realms. We identified the...

["Biodiversity","Biogeography","Paleontology"]
doi:10.7717/peerj.5313
110 downloads
632 views

Ostracoderms (fossil armoured jawless fishes) shed light on early vertebrate evolution by revealing the step-wise acquisition of jawed vertebrate characters, and were important constituents of Middle Palaeozoic vertebrate faunas. A wide variety of head shield shapes...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.5249
1,171 downloads
12,787 views

A partial ankylosaurid skeleton from the upper Campanian Kaiparowits Formation of southern Utah is recognized as a new taxon, Akainacephalus johnsoni, gen. et sp. nov. The new taxon documents the first record of an associated ankylosaurid skull and postcranial...

["Biodiversity","Biogeography","Evolutionary Studies","Paleontology","Taxonomy"]
doi:10.7717/peerj.5016
79 downloads
837 views

Nitraria is a halophytic taxon (i.e., adapted to saline environments) that belongs to the plant family Nitrariaceae and is distributed from the Mediterranean, across Asia into the south-eastern tip of Australia. This taxon is thought to have originated in Asia...

["Biogeography","Evolutionary Studies","Molecular Biology","Paleontology"]
doi:10.7717/peerj.5055
560 downloads
1,381 views

Xenoposeidon proneneukos is a sauropod dinosaur from the Early Cretaceous Hastings Group of England. It is represented by a single partial dorsal vertebra, NHMUK PV R2095, which consists of the centrum and the base of a tall neural arch. Despite its fragmentary...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.5212

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