Preprints (not yet peer-reviewed)

143 downloads
565 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:10.7287/peerj.preprints.2313v2
138 downloads
535 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.2594v2
68 downloads
919 views

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

["Biogeography","Paleontology"]
doi:10.7287/peerj.preprints.2662v2
190 downloads
1,068 views

A novel reconstruction of the nodosaurid dinosaur Struthiosaurus austriacus Bunzel 1871 is presented. Because bones and dermal armor are preserved as disarticulated elements only and because of the lack of field notes from the original excavation(s), any attempt...

["Evolutionary Studies","Paleontology","Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.2758v1
176 downloads
1,734 views

Ceratopsids (“horned dinosaurs”) are known from numerous specimens in western North America and Asia, a distribution reflecting the inferred subaerial link between the two landmasses during the Late Cretaceous. However, this clade was previously unknown from eastern...

["Paleontology","Zoology"]
doi:10.7287/peerj.preprints.2746v1
106 downloads
676 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
36 downloads
123 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
107 downloads
505 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
569 downloads
1,609 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
133 downloads
781 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
254 downloads
1,835 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
99 downloads
130 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
163 downloads
706 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
65 downloads
126 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
72 downloads
262 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
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