Preprints (not yet peer-reviewed)

68 downloads
571 views

While large mass mortality events (MMEs) are well known for toothed whales, they have been rare in baleen whales due to their less gregarious behaviour. Although in most cases the cause of mortality has not been conclusively identified, some baleen whale mortality...

["Conservation Biology","Ecosystem Science","Marine Biology","Paleontology","Zoology"]
doi:10.7287/peerj.preprints.2707v1
17 downloads
99 views

The morphology and affinities of newly discovered soft-bodied fossils from the early Cambrian (Series 2: Stage 4, Dyeran) Carrara Formation that resemble modern and fossil porpitids are discussed. These specimens show substantial similarity to the Ordovician porpitid...

["Paleontology","Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.2706v1
84 downloads
418 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 which entered this...

["Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.2701v1
547 downloads
1,514 views

The largest published data matrix for phylogenetic analysis of Paleozoic limbed vertebrates (Ruta M, Coates MI. 2007. Journal of Systematic Palaeontology 5:69–122) supported variously controversial hypotheses; e.g., it recovered Seymouriamorpha, Diadectomorpha...

["Biodiversity","Ecology","Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.1596v2
50 downloads
596 views

Vertebrate trace fossils are common in Upper Triassic deposits across the American southwest. These ichnofauna are dominated by Grallator, Brachycheirotherium, and Pseudotetrasauropus and lack ichnotaxa traditionally considered to be Early Jurassic in age, such...

["Biogeography","Paleontology"]
doi:10.7287/peerj.preprints.2662v1
126 downloads
744 views

The Cleveland-Lloyd Dinosaur Quarry (CLDQ) is the densest deposit of Jurassic theropod dinosaurs discovered to date. Unlike typical Jurassic bone deposits, it is dominated by the presence of Allosaurus fragilis. Since excavation began in the 1920’s numerous hypotheses...

["Ecosystem Science","Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.2600v1
124 downloads
465 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 the patella is...

["Evolutionary Studies","Paleontology","Zoology","Anatomy and Physiology"]
doi:10.7287/peerj.preprints.2594v1
224 downloads
1,689 views

Late Cretaceous deposits of the North American Western Interior represent the best, if not only, opportunity to construct a high-resolution chronostratigraphic framework within which to conduct continental-scale geological and paleontological analyses. This is...

["Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.2554v1
86 downloads
124 views

Pachycormids occupy a key position within Actinopterygii, as part of the Holostei- Teleostei Transition, although their precise position in this hierarchy has been fought over for some years. Discoveries in the last three years have expanded our global knowledge...

["Aquaculture, Fisheries and Fish Science","Evolutionary Studies","Marine Biology","Paleontology","Zoology"]
doi:10.7287/peerj.preprints.2550v1
136 downloads
671 views

Thalattosuchians were highly specialised marine archosaurs of the Jurassic and Early Cretaceous, and represent a peak of aquatic adaptation among crocodylomorphs. Relatively little is known of their endocranial anatomy or its relevance for the evolution of sensory...

["Paleontology","Zoology"]
doi:10.7287/peerj.preprints.2539v1
59 downloads
117 views

Here we describe and illustrate 31 Miocene corals species from the Siamaná and Jimol Formations that were collected over two expeditions in the Guajira basin, Colombia during 2011 and 2014. Corals include 25 species, derived from 15 different genera and 12 families....

["Marine Biology","Paleontology"]
doi:10.7287/peerj.preprints.2507v1
65 downloads
243 views

We herein examine the only known non-planispirally coiled early Devonian ammonoid, the holotype specimen of Ivoites opitzi, to investigate if the host was encrusted in vivo and if these sclerobionts were responsible for the trochospiral coiling observed on this...

["Paleontology","Taxonomy"]
doi:10.7287/peerj.preprints.2479v1
237 downloads
680 views

The Bahariya formation is one of the most productive in Africa in terms of fossil material. This paper conducts a comprehensive review of the flora & fauna and creates ecological reconstruction of this assemblage based on modern analogues. There is no evidence...

["Ecology","Ecosystem Science","Paleontology"]
doi:10.7287/peerj.preprints.2470v1
1,120 downloads
6,486 views

Barosaurus is a diplodocid sauropod from the Upper Jurassic Morrison Formation of the western United States, and is known for its very long neck. It is closely related to the sympatric Diplodocus, and often thought of as more or less identical except with a longer...

["Animal Behavior","Evolutionary Studies","Paleontology"]
doi:10.7287/peerj.preprints.67v2
169 downloads
324 views

Reconstructing the timescale of the Tree of Life is one of the principal aims of evolutionary biology. This has been greatly aided by the development of the molecular clock, which enables evolutionary timescales to be estimated from genetic data. In recent years,...

["Biogeography","Evolutionary Studies","Genetics","Genomics","Paleontology"]
doi:10.7287/peerj.preprints.2403v1
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