PeerJ is an open access peer-reviewed scientific mega journal covering research in the biological and medical sciences. It is published by a company of the same name that was co-founded by CEO Jason Hoyt (formerly at Mendeley) and publisher Peter Binfield (formerly at PLOS ONE), with financial backing of US$950,000 from O'Reilly Media and O'Reilly AlphaTech Ventures. It was officially launched in June 2012, started accepting submissions on December 3, 2012, and published its first articles on February 12, 2013. The company is a member of CrossRef, CLOCKSS, ORCID, and the Open Access Scholarly Publishers Association. The company's offices are in Corte Madera (California, USA), and London (Great Britain).
PeerJ uses a business model that differs from traditional publishers – in that no subscription fees are charged to its readers – and also used to differ from the major open-access publishers in that publication fees were not levied per article but per publishing researcher and at a much lower level. PeerJ is complemented by a preprint service named PeerJ Preprints which launched on April 3, 2013. The low costs were said to be in part achieved by using cloud infrastructure: both PeerJ and PeerJ Preprints run on Amazon EC2, with the content stored on Amazon S3.
Originally, PeerJ charged authors a one-time membership fee that allowed them – with some additional requirements, such as commenting upon, or reviewing, at least one paper per year – to publish in the journal for the rest of their life. Submitted research is judged solely on scientific and methodological soundness (as at PLoS ONE), with a facility for peer reviews to be published alongside each paper.
However, since October 1, 2016. at least, PeerJ has reverted to a more conventional open access model of charging per article published, coupled with an alternative lifetime membership subscription. The current charges for publishing a single article in PeerJ are $1095.00, and life-time membership permitting one free paper per year for life is $399 (basic membership) or five per year for $499 (premium membership). Because all authors on a paper are required to be members, it may sometimes be cheaper to pay the per publication charge than paying membership fees for all authors.
The journal is abstracted and indexed in Science Citation Index Expanded, PubMed, PubMed Central, Scopus, Web of Science, Google Scholar, the DOAJ, the American Chemical Society (ACS) databases, EMBASE, CAB Abstracts, Europe PubMed Central, AGORA, ARDI, HINARI, OARE, the ProQuest databases, and OCLC. According to the Journal Citation Reports, it has a 2016 impact factor of 2.2.
On September 12, 2013 the Association of Learned and Professional Society Publishers awarded PeerJ the "Publishing Innovation" of the year award.
On 6th November 2018, PeerJ launched five new journals dedicated to chemistry: PeerJ Physical Chemistry, PeerJ Organic Chemistry, PeerJ Inorganic Chemistry, PeerJ Analytical Chemistry, and PeerJ Materials Science.
Aeolosaurini is an extinct clade of titanosaurian dinosaurs known from the late Cretaceous period of Argentina and Brazil. Thomas Holtz (2011) assigned Adamantisaurus, Aeolosaurus, Gondwanatitan, Muyelensaurus, Panamericansaurus, Pitekunsaurus and Rinconsaurus to Aeolosauridae. Rodrigo M. Santucci and Antonio C. de Arruda-Campos (2011) in their cladistic analysis found Aeolosaurus, Gondwanatitan, Maxakalisaurus, Panamericansaurus and Rinconsaurus to be aeolosaurids.Australovenator
Australovenator (meaning "southern hunter") is a genus of megaraptorid theropod dinosaur from Cenomanian (Late Cretaceous)-age Winton Formation (dated to 95 million years ago) of Australia. It is known from partial cranial and postcranial remains which were described in 2009 by Scott Hocknull and colleagues, although additional descriptions and analyses continue to be published. It is the most complete predatory dinosaur discovered in Australia.Chelodina murrayi
Chelodina murrayi is an extinct species of snake-necked turtle from the Waite Formation on the Alcoota Scientific Reserve, north-east of Alice Springs in the Northern Territory of Australia. The species would appear to belong to the Chelodina novaeguineae group of species within the subgenus Chelodina.Dynamoterror
Dynamoterror is a genus of tyrannosaurid theropod dinosaur that lived in what is now New Mexico during the Late Cretaceous Period, approximately 78 million years ago. The type species is Dynamoterror dynastes. The generic name is derived from the Greek word dynamis (δύναμις) meaning "power" and the Latin word terror. The specific name is derived from δυνάστης, "ruler".Elasmaria
Elasmaria is a clade of iguanodont ornithopods known from Cretaceous deposits in South America, Antarctica, and Australia.Europatitan
Europatitan is a genus of somphospondylan sauropod from the Early Cretaceous Castrillo de la Reina Formation of Iberia, known from a relatively completely specimen discovered in the early 2000s. It contains a single species, E. eastwoodi, named after actor and director Clint Eastwood.Exercise equipment
Exercise equipment is any apparatus or device used during physical activity to enhance the strength or conditioning effects of that exercise by providing either fixed or adjustable amounts of resistance, or to otherwise enhance the experience or outcome of an exercise routine.
Exercise equipment may also include such wearable items as proper footgear, gloves, and hydration packs.Gorgonopsia
The Gorgonopsia ("Gorgon faces") are an extinct suborder of theriodonts. Like other therapsids, gorgonopsians were at one time called "mammal-like reptiles", although this description is deceptive because theriodonts are Synapsida, not Reptilia.Hallopodidae
Hallopodidae is a family of Late Jurassic crocodylomorphs. They have been recovered as the closest relatives of the Crocodyliformes.Hapsidopareion
Hapsidopareion is an extinct genus of microsaur belonging to the family Hapsidopareiontidae.Invictarx
Invictarx is a genus of herbivorous nodosaurid dinosaur from New Mexico dating from the early Campanian epoch of the Late Cretaceous.Jean-Lou Justine
Jean-Lou Justine (born 1955), French parasitologist and zoologist, is a professor at the National Museum of Natural History in Paris, France, and a specialist of fish parasites and invasive land planarians.Jeholosauridae
Jeholosaurids were herbivorous neornithischian dinosaurs from the Cretaceous Period (Aptian - Santonian, with a possible Campanian record) of Asia. The family was first proposed by Han et al. in 2012. The jeholosaurids were defined as those ornithischians more closely related to Jeholosaurus shangyuanensis than to Hypsilophodon foxii, Iguanodon bernissartensis, Protoceratops andrewsi, Pachycephalosaurus wyomingensis, or Thescelosaurus neglectus. The Jeholosauridae includes the type genus Jeholosaurus and Yueosaurus.Menefee Formation
The Menefee Formation is a Campanian geologic formation of New Mexico, United States.Paludititan
Paludititan is a genus of herbivorous titanosaurian dinosaur which lived in the area of present Romania during the Late Cretaceous. It existed in the island ecosystem known as Hațeg Island.Sauropoda
Sauropoda ( or ), or the sauropods (; sauro- + -pod, "lizard-footed"), are a clade of saurischian ("lizard-hipped") dinosaurs. They had very long necks, long tails, small heads (relative to the rest of their body), and four thick, pillar-like legs. They are notable for the enormous sizes attained by some species, and the group includes the largest animals to have ever lived on land. Well-known genera include Brachiosaurus, Diplodocus, Apatosaurus and Brontosaurus.Sauropods first appeared in the late Triassic Period, where they somewhat resembled the closely related (and possibly ancestral) group "Prosauropoda". By the Late Jurassic (150 million years ago), sauropods had become widespread (especially the diplodocids and brachiosaurids). By the Late Cretaceous, those groups had mainly been replaced by the titanosaurs, which had a near-global distribution. However, as with all other non-avian dinosaurs alive at the time, the titanosaurs died out in the Cretaceous–Paleogene extinction event. Fossilised remains of sauropods have been found on every continent, including Antarctica.The name Sauropoda was coined by O.C. Marsh in 1878, and is derived from Greek, meaning "lizard foot". Sauropods are one of the most recognizable groups of dinosaurs, and have become a fixture in popular culture due to their large sizes.
Complete sauropod fossil finds are rare. Many species, especially the largest, are known only from isolated and disarticulated bones. Many near-complete specimens lack heads, tail tips and limbs.Scutarx
Scutarx is an aetosaurine suchian known from the Triassic Chinle Formation of Petrified Forest National Park of Arizona and the Cooper Canyon Formation of Texas. The type and only species, Scutarx deltatylus, was described in 2016 by William G. Parker. Known fossils include a mandible and a dentary from Arizona.Thescelosaurinae
Thescelosaurinae is a subfamily of ornithischian dinosaurs from the Early Cretaceous of Asia and the Late Cretaceous of North America.Ticinosuchus
Ticinosuchus is an extinct genus of pseudosuchian archosaur from the Middle Triassic (Anisian - Ladinian) of Switzerland and Italy.