Preprints (not yet peer-reviewed)

96 downloads
229 views

Background. Yunnanolepidoids constitute either the basal-most 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:10.7287/peerj.preprints.26867v1
207 downloads
496 views

Background. The phylogenetic placement of Cretaceous marine turtles, especially Protostegidae, is still under debate among paleontologists. Whereas protostegids were traditionally thought to be situated within the clade of recent marine turtles (Chelonioidea),...

["Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.26863v1
35 downloads
96 views

Acquiring data on the occurrences of many types of difficult to identify objects are often still made by human observation, e.g. in biodiversity and paleontologic research. Existing computer counting programs used to record such data have various limitations, including...

["Biodiversity","Bioinformatics","Ecology","Paleontology"]
doi:10.7287/peerj.preprints.26836v1
414 downloads
946 views

During the Cretaceous period, North America was divided into two landmasses, the eastern Appalachia and western Laramidia. Recent research on several sites scattered across the eastern margin of North America has allowed for the analysis of vertebrate faunas from...

["Biogeography","Paleontology","Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.26829v1
23 downloads
87 views

Despite an estimated molecular divergence date of 40 million years (middle Eocene) between wombats and their closest living relative, the koala, the fossil record of wombats is poor. The two oldest described wombats, Nimbavombatus boodjamullensis and Rhizophascolonus...

["Evolutionary Studies","Paleontology","Taxonomy"]
doi:10.7287/peerj.preprints.26828v1
36 downloads
79 views

The ‘Lessepsian invasion’ – the massive influx of Indo-Pacific biota into the Mediterranean Sea via the Suez Canal – is the largest marine biological invasion. The lack of data on pre-invasion community composition, however, severely impairs our understanding to...

["Ecology","Marine Biology","Paleontology","Environmental Impacts"]
doi:10.7287/peerj.preprints.26762v1
99 downloads
453 views

The amphicyonid, or “bear-dog,” Paradaphoenus was a small-bodied, hypercarnivorous carnivoran that lived in North America during the Oligocene. Specimens of Paradaphoenus are rare, in part owing to the common inaccurate referral of specimens to the abundant canid...

["Biogeography","Paleontology"]
doi:10.7287/peerj.preprints.26735v1
79 downloads
105 views

Pavocosa sp. (Lycosidae) burrows found in an open sparsely vegetated area on the edge of the saline lake the “Gran Salitral”, in central Argentina, are described. Burrows were studied by capturing the occupant and casting them with dental plaster. The hosting sediments...

["Animal Behavior","Paleontology"]
doi:10.7287/peerj.preprints.26674v1
61 downloads
106 views

The Messinian stromatolites belonging to the Terminal Carbonate Complex unit, from the northern sector of the Bajo Segura Basin (CAM section, Sierra del Colmenar, SE Spain) have been studied. To understand the direct relationship between the morphologies of the...

["Marine Biology","Paleontology"]
doi:10.7287/peerj.preprints.26648v1
147 downloads
326 views

Large cylindrical structures with a dominantly laminated fill occurring in the loess-paleosol sequence of the late Miocene Cerro Azul Formation (central Argentina) are interpreted as mammal burrows. A total of 115 burrow fills from three localities were measured....

["Paleontology"]
doi:10.7287/peerj.preprints.26632v1
113 downloads
185 views

One of the first endocasts of a dipnoan (lungfish) to be realised was that of the Upper Devonian taxon Chirodipterus australis. This early interpretation was based on observations of the shape of the cranial cavity alone and was not based on a natural cast or 'steinkern'...

["Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.26591v1
127 downloads
245 views

Background. The pycnodontiform fish Pycnodus is one of the representatives of the highly diverse actinopterygian fish fauna from the early Eocene Bolca Lagerstätte, representing one of the youngest and thus last occurrences of the extinct neopterygian clade Pycnodontiformes....

["Ecology","Evolutionary Studies","Paleontology","Taxonomy"]
doi:10.7287/peerj.preprints.26582v1
433 downloads
876 views

Direct documentation of the ecology of past life is often rare when the fossil record is comparatively poor, as in the case of the terrestrial fauna of the Maastrichtian of eastern North America. Here, I describe a femur and partial tibia shaft assignable to theropods...

["Ecology","Paleontology"]
doi:10.7287/peerj.preprints.26565v1
189 downloads
377 views

The evolution and occurrence of fossil sea turtles at the Pacific margin of South America is poorly known and restricted to Neogene (Miocene) findings from Perú. Here we report and describe the first record of Paleogene (Late Oligocene, ~24 Ma) sea turtle remains....

["Biogeography","Marine Biology","Paleontology","Zoology"]
doi:10.7287/peerj.preprints.26532v1
264 downloads
544 views

Background. Despite a fifty-year failure of paleontologists to find a viable connection between geomagnetic polarity reversals and evolutionary patterns, recent databases show that the early appearance, radiation, and diversification of Paleozoic vertebrates tend...

["Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.26490v1
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