Peer-reviewed Articles - Biology

64 downloads
307 views

Neobalaenines are an enigmatic group of baleen whales represented today by a single living species: the pygmy right whale, Caperea marginata, found only in the Southern Hemisphere. Molecular divergence estimates date the origin of pygmy right whales to 22–26 Ma,...

["Marine Biology","Paleontology","Zoology"]
doi:10.7717/peerj.5025
50 downloads
357 views

Plants and insects are constantly interacting in complex ways through forest communities since hundreds of millions of years. Those interactions are often related to variations in the climate. Climate change, due to human activities, may have disturbed these relationships...

["Ecology","Ecosystem Science","Paleontology","Plant Science"]
doi:10.7717/peerj.5075
302 downloads
760 views

A new three-dimensionally preserved troodontid specimen consisting of most of the skull, partial mandibles and six articulated cervical vertebrae (PMOL-AD00102) from the Early Cretaceous Yixian Formation of Beipiao, western Liaoning, China is identified as Sinovenator...

["Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.4977
37 downloads
327 views

We present two cases of study of ontogenetic allometry in outlines of bivalves using longitudinal data, a rarity among fossils, based on the preserved post-larval record of shells. The examples are two infaunal burrowing bivalves of the southern South America,...

["Evolutionary Studies","Marine Biology","Paleontology","Zoology"]
doi:10.7717/peerj.5051
263 downloads
1,351 views

The reproduction of titanosaur dinosaurs is still a complex and debated topic. Their Late Cretaceous nesting sites are distributed worldwide and their eggs display substantial morphological variations according to the parent species. In contrast to the typical...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.4971
271 downloads
1,090 views

Direct evidence of paleoecological processes is often rare when the fossil record is poor, as in the case of the Cretaceous of eastern North America. Here, I describe a femur and partial tibia shaft assignable to theropods from two Late Cretaceous sites in New...

["Ecology","Paleontology"]
doi:10.7717/peerj.4973
383 downloads
1,743 views

The early evolution of gorgonopsians is poorly understood. New material from the Kotelnich locality in Russia expands our knowledge of middle/earliest late Permian gorgonopsians from Laurasia. Two gorgonopsian taxa are recognized from Kotelnich: Viatkogorgon ivakhnenkoi...

["Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.4954
1 citation
449 downloads
2,170 views

A new therocephalian taxon (Gorynychus masyutinae gen. et sp. nov.) is described based on a nearly complete skull and partial postcranium from the Permian Kotelnich locality of Russia. Gorynychus displays an unusual mixture of primitive (“pristerosaurian”) and...

["Paleontology","Zoology"]
doi:10.7717/peerj.4933
143 downloads
902 views

The Clarkia lagerstätte (Latah Formation) of Idaho is well known for its beautifully preserved plant fossils as well as a fauna of insects and fish. Here we present the first known tetrapod fossil from these deposits. This specimen, recovered from the lower anoxic...

["Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.4880
392 downloads
2,116 views

Background Plesiosaurs are marine reptiles that arose in the Late Triassic and survived to the Late Cretaceous. They have a unique and uniform bauplan and are known for their very long neck and hydrofoil-like flippers. Plesiosaurs are among the most successful...

["Evolutionary Studies","Paleontology","Statistics","Histology"]
doi:10.7717/peerj.4955
335 downloads
1,601 views

Bellusaurus sui is an enigmatic sauropod dinosaur from the Middle-Late Jurassic Shishugou Formation of northwest China. Bellusaurus is known from a monospecific bonebed preserving elements from more than a dozen juvenile individuals, including numerous bones of...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.4881
90 downloads
777 views

Clades that represent a new ‘Bauplan’ have been hypothesised to exhibit more variability than more derived clades. Accordingly, there is an expectation of greater variation around the time of the origin of a clade than later in its evolutionary history. This ‘canalisation’...

["Evolutionary Studies","Paleontology","Zoology"]
doi:10.7717/peerj.4899
385 downloads
3,871 views

We describe a nearly complete pedal ungual phalanx, discovered in the Kem Kem Beds (Cenomanian) of Tafilalt region, south-eastern Morocco. The bone is symmetric, pointed, low, elongate, and almost flat ventrally in lateral aspect. This peculiar morphology allows...

["Evolutionary Studies","Paleontology"]
doi:10.7717/peerj.4785
431 downloads
1,702 views

Hulsanpes perlei is an enigmatic theropod dinosaur from the Baruungoyot Formation (?mid- to upper Campanian, Upper Cretaceous) of Mongolia. It was discovered in 1970, during the third Polish-Mongolian paleontological expedition to the Nemegt Basin. The taxon is...

["Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.4868
102 downloads
827 views

Background Yunnanolepidoids constitute either the most basal consecutive segments or the most primitive clade of antiarchs, a highly diversified jawed vertebrate group from the Silurian and Early Devonian periods. Although the general morphology of yunnanolepidoids...

["Evolutionary Studies","Paleontology","Zoology"]
doi:10.7717/peerj.4808

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