2023 in archosaur paleontology

This article records new taxa of every kind of fossil archosaur that are scheduled to be described during 2023, as well as other significant discoveries and events related to the paleontology of archosaurs that will be published in 2023.

List of years in archosaur paleontology
In reptile paleontology
2020
2021
2022
2023
2024
2025
2026
In paleontology
2020
2021
2022
2023
2024
2025
2026
In science
2020
2021
2022
2023
2024
2025
2026
+...

Pseudosuchians

New pseudosuchian taxa
Name Novelty Status Authors Age Type locality Country Notes Images

Dentaneosuchus[1]

Gen. et comb. nov

Martin et al.

Eocene (Bartonian)

Sables du Castrais Formation

 France

A member of the family Sebecidae; a new genus "Atacisaurus" crassiproratus Astre (1931).

Scolotosuchus[2]

Gen. et sp. nov

Valid

Sennikov

Early Triassic

Lipovskaya Formation

 Russia
( Volgograd Oblast)

A member of the family Rauisuchidae. The type species is S. basileus. Published online in 2023, but the issue date is listed as December 2022.[2]

Turnersuchus[3]

Gen. et sp. nov

Wilberg et al.

Early Jurassic (Pliensbachian)

Charmouth Mudstone Formation

 United Kingdom

An early diverging thalattosuchian.
The type species is T. hingleyae.

Aetosaur research
  • A study on the humeral histology in specimens of Aetosaurus ferratus from the Kaltental site (Lower Stubensandstein, Germany) is published by Teschner et al. (2023), who interpret the studied specimens as juveniles, and interpret the accumulation of small-sized specimens at Kaltental as possible evidence of gregarious behavior in juveniles of A. ferratus.[4]

Crocodylomorph research
  • Evidence from the osteological correlates of the trigeminal nerve in extant and fossil taxa, interpreted as indicative of an increase in sensory abilities in Early Jurassic crocodylomorphs, preceding their transitions to a semiaquatic habitat, is presented by Lessner et al. (2023).[5]
  • A study on palatal grooves of thalattosuchians is published by Young et al. (2023), who report that the studied grooves were continuous with ossified canals that connected the oral cavity to the nasal cavity, and interpret the studied grooves and canals as likely evidence of the existence of a heat exchange pathway linking the palatal vascular plexus to the vessels that supplied blood to the brain and eyes.[6]
  • New specimen of Hsisosuchus of uncertain specific assignment, providing new information on the shape and arrangement of the osteoderms in the ventral trunk shield of members of this genus, is described from the Upper Jurassic of Yunnan (China) by Wu et al. (2023).[7]
  • A study on possible effects of climate, body size and diet on the survival of terrestrial notosuchians during the Cretaceous–Paleogene extinction event is published by Aubier et al. (2023), who find evidence of increase in body size during the Late Cretaceous which may be related to the shift from omnivorous to carnivorous diet, but find the studied data insufficient to list definitive reasons for the survival of sebecids into the Cenozoic.[8]
  • A study on the bone histology of Stratiotosuchus maxhechti, interpreted as indicative of growth dynamics similar to those of medium-to-large theropods, is published by Andrade et al. (2023), who argue that niche partitioning between baurusuchids and theropods was more likely than competitive exclusion.[9]
  • Description of new fossil material of itasuchid crocodyliforms from the Upper Cretaceous Bauru Group (Brazil) is published by Pinheiro et al. (2023), who also confirm the monophyly of Itasuchidae with some variation in its content, and find the South American itasuchid species to occupy a crocodyliform morphospace, possibly indicating distinct niche occupations.[10]
  • A new mandibular ramus referred to Hamadasuchus cf. reboulli is described by Pochat-Cottilloux et al., who propose an emended diagnosis of the taxon and argue that only three specimens are actually referrable to this species. They further discuss multiple anatomical characters of the mandible that they suggest represent intraspecific or ontogenetic differences and are not diagnostically valuable. As a consequence, it is suggested that Antaeusuchus may be a species of Hamadasuchus.[11]
  • A tooth of a member of the genus Purussaurus is described from the Toma Vieja locality near Paraná City (traditionally considered as the base of Ituzaingó Formation) by Bona et al. (2023), representing the first record of this genus from the Late Miocene of Argentina and the southernmost occurrence of a member of this genus reported to date.[12]
  • A study on the neuroanatomy and phylogenetic affinities of Portugalosuchus azenhae is published by Puértolas-Pascual et al. (2023), who recover Portugalosuchus as a member of Gavialoidea most closely related to Thoracosaurus neocesariensis.[13]
  • A collection of isolated gavialoid teeth is reported from the shallow marine deposits of Eocene Turnu Roșu (Romania) by Venczel et al. (2023), who recognize a minimum of five morphotypes.[14]
  • Burke & Mannion (2023) present a reconstruction of the neuroanatomy and neurosensory apparatus of "Tomistoma" dowsoni, providing evidence that this gavialoid displayed an intermediate morphology between those of extant gharials and false gharials.[15]
  • A collection of eighteen isolated neosuchian teeth as well as a single isolated crocodyliform osteoderm are reported from the Berriasian–Valanginian Feliz Deserto Formation (Brazil) by Lacerda et al. (2023), who recognize a minimum of three morphotypes among the teeth.[16]

Non-avian dinosaurs

New dinosaur taxa
Name Novelty Status Authors Age Type locality Country Notes Images
Chucarosaurus[17] Gen. et sp. nov In press Agnolin et al. Late Cretaceous (Cenomanian-Turonian) Huincul Formation  Argentina A colossosaurian titanosaur. The type species is C. diripienda.

Malefica[18]

Gen. et sp. nov

In press

Prieto-Márquez & Wagner

Late Cretaceous (Campanian)

Aguja Formation

 United States
( Texas)

A basally branching hadrosaurid. Genus includes new species M. deckerti. Announced in 2022; the final article version will be published in 2023.

Platytholus[19]

Gen. et sp. nov

Horner, Goodwin & Evans

Late Cretaceous (Maastrichtian)

Hell Creek Formation

 United States
( Montana)

A pachycephalosaurid. The type species is P. clemensi.

Protathlitis[20]

Gen. et sp. nov

Valid

Santos-Cubedo et al.

Early Cretaceous (Barremian)

Arcillas de Morella Formation

 Spain

A baryonychine spinosaurid theropod. The type species is P. cinctorrensis.

General non-avian dinosaur research
  • A review of the history of morphometric studies in non-avian dinosaurs is published by Hedrick (2023).[21]
  • Cullen et al. (2023) reevaluate evidence for anomalously positive stable carbon isotope compositions of dinosaur bioapatite, report that the studied anomaly is present in the carbon isotope compositions of bioapatite in tooth enamel of not only dinosaurs but also mammals and crocodilians and in scale ganoine of gars from the "Rainy Day Site" in the Campanian Oldman Formation (Alberta, Canada) but is absent in extant vertebrates from the near-analogue modern ecosystem in the Atchafalaya Basin (Louisiana, United States), and interpret their findings as indicating that the studied anomaly is not the result of a unique dietary physiology of dinosaurs.[22]
  • Dinosaur eggshell fragments with preserved eggshell membranes are reported from the Late Jurassic Brushy Basin Member of the Morrison Formation (Utah, United States) by Lazer et al. (2023).[23]
  • Navarro-Lorbés et al. (2023) describe tracks produced by an undetermined bipedal non-avian dinosaur from the Lower Cretaceous Cameros Basin (Spain), interpreted as likely produced during swimming, and providing information on the swimming behaviour of the trackmaker.[24]
  • Description of four dinosaur teeth assignable to three different families (Tyrannosauroidea, Titanosauriformes, and Hadrosauroidea) from the Cretaceous Sunjiawan Formation (China) is published by Yin et al. (2023), representing the first record of a theropod from the formation, as well as representing potentially two new taxa, as the hadrosauroid teeth are distinct from Shuangmiaosaurus.[25]
  • A review of the Early Cretaceous dinosaur fauna from Thailand is published by Samathi et al. (2023).[26]
  • Li et al. (2023) report the discovery of sauropod and ornithopod tracks from the Zonggei Formation, providing evidence for the presence of abundant dinosaurs in the Late Cretaceous of the Tibet region (China).[27]
  • A study on the stable oxygen and carbon isotope compositions of dinosaur eggshell calcites and tooth apatites from the Upper Cretaceous Kakanaut Formation (Chukotka Autonomous Okrug, Russia) is published by Amiot et al. (2023), who interpret their findings as indicating that near-polar Kakanaut dinosaurs likely laid eggs in early spring, giving time for the hatchlings to grow before winter.[28]

Saurischian research
  • A tracksite of dinosaur footprints is described from the Middle Jurassic Xietan Formation (Hubei, China) by Xing et al. (2023), who interpret the tracks as belonging to small sauropods (similar to Brontopodus) and probable theropods.[29]

Theropod research
  • A study on the developmental strategies underlying the evolution of body size of non-avialan theropods is published by D'Emic et al. (2023), who report that changes in the rate and duration of growth contributed nearly equally to the body size changes.[30]
  • A study on the relationship between the body size of theropods, the area of muscles important for their balance and locomotion, and their capacity for agility is published by Henderson (2023), who argues that theropod body plan had an upper size limit based on a minimum acceleration threshold.[31]
  • Cullen et al. (2023) use multiple lines of evidence, including histology of teeth and morphological comparisons, to evaluate proposed theropod facial reconstructions, and argue that non-avian theropods most likely had lips that covered their teeth.[32]
  • Peng et al. (2023) describe abundant tracks from the Upper Triassic Tianquan track site (Xujiahe Formation; Ya'an, western Sichuan Basin, China), interpreted as produced by small theropods and representing one of the earliest record of dinosaurs from the eastern Tethys realm.[33]
  • New specimen of Sinosaurus triassicus, including a complete skull and 11 cervical vertebrae, is described by Zhang, Wang & You (2023).[34]
  • Sharma, Hendrickx & Singh (2023) describe dental material of a non-coelurosaur averostran theropod from the Bathonian Fort Member of the Jaisalmer Formation (India), providing evidence of the presence of at least one taxon of a medium to large-bodied theropod on the Tethyan coast of India during the Middle Jurassic.[35]
  • A collection of seven isolated spinosaurid teeth as well as a single preungual pedal phalanx of an indetermined theropod are reported from the Berriasian–Valanginian Feliz Deserto Formation (Brazil) by Lacerda et al. (2023).[16]
  • Barker et al. (2023) reconstruct the endocasts of the baryonychine spinosaurids Baryonyx walkeri and Ceratosuchops inferodios, finding their morphology to be similar to non-maniraptoriform theropods despite their highly modified skulls.[36]
  • The first baryonychine teeth from South America reported to date are described from the Lower Cretaceous Feliz Deserto Formation (Brazil) by Lacerda et al. (2023).[37]
  • Redescription of the anatomy of the skull of Irritator challengeri and a study on the affinities of this spinosaurid is published by Schade et al. (2023).[38]
  • Description of a pathological tooth of Spinosaurus from the Late Cretaceous Ifezouane Formation (Morocco) is published by Smith and Martill (2023), representing the first record of external dental pathology in a spinosaurine spinosaurid.[39]
  • Reconstruction of the musculature of the pectoral girdle and forelimbs in megaraptoran theropods is presented by Aranciaga Rolando et al. (2023).[40]
  • A pathological third metatarsal of Phuwiangvenator, indicating that the bone experienced a greenstick fracture and healed before the animal's death, is described from the Lower Cretaceous Sao Khua Formation (Khon Kaen, Thailand) by Samathi et al. (2023).[41]
  • A study estimating the number of telencephalic neurons in theropod dinosaurs is published by Herculano-Houzel (2023), who argues that Allosaurus and Tyrannosaurus are endotherms with baboon- and monkey-like numbers of neurons;[42] however, this study has been criticized.[43]
  • The study suggesting that carnosaurs like Allosaurus were primarily scavengers that fed on sauropod carcasses, originally published by Pahl and Ruedas (2021)[44] is criticized by Kane et al. (2023)[45] but later defended by Pahl and Ruehdas (2023).[46]
  • Evidence of preservation of elements associated with bone remodeling and redeposition (sulfur, calcium, zinc) in a specimen of Tyrannosaurus rex, interpreted as indicative of preservation of original endogenous chemistry in the studied specimen, is presented by Anné et al. (2023).[47]
  • A study on the formation and function of the enlarged unguals of alvarezsauroid and therizinosaur theropods is published by Qin et al. (2023), who interpret their findings as indicative of the evolution of digging adaptions in late-diverging alvarezsauroids, find the unguals of early-branching therizinosaurs to perform well in piercing and pulling, and interpret the enlarged unguals of Therizinosaurus as not adapted to functions that required considerable stress-bearing.[48]
  • Two ornithomimid pedal phalanges are described from the Late Cretaceous Fox Hills Formation (South Dakota, United States) by Chamberlain, Knoll, and Sertich (2023), representing the first dinosaur skeletal material from the formation.[49]
  • Wills, Underwood & Barrett (2023) identify therizinosauroid and troodontid teeth, as well as three morphotypes of dromaeosaurid teeth, in a sample of isolated theropod teeth from the Middle Jurassic (Bathonian) microvertebrate sites in the United Kingdom.[50]
  • Reconstruction of the hindlimb musculature of Falcarius utahensis is presented by Smith (2023).[51]
  • Smith & Gillette (2023) reconstruct soft tissues of the hindlimbs and likely posture of Nothronychus graffami.[52]
  • Skeletal indicators of a propatagium are investigated by Uno & Hirasawa (2023), supporting the presence of this structure in non-avian pennaraptorans such as Caudipteryx and Microraptor.[53]
  • A review of bone microstructure and histology in dromaeosaurids and troodontids is published by Martin, Currie & Kundrát (2023).[54]
  • A partial left tibia and articulated proximal tarsals, likely belonging to an indeterminate velociraptorine, are described from the Upper Cretaceous Lo Hueco fossil site (Cuenca, Spain) by Malafaia et al. (2023), who also review the European theropods of the Late Cretaceous.[55]
  • Averianov & Lopatin (2023) describe new fossil material of Kansaignathus sogdianus from the Santonian Ialovachsk Formation (Tajikistan), and confirm the phylogenetic placement of K. sogdianus as the basalmost Asiatic velociraptorine.[56]
  • A study on the nasal structures of Velociraptor mongoliensis, indicating that this theropod was unlikely to have a fully developed nasal thermoregulation apparatus for its brain as seen in modern birds, is published by Tada et al. (2023).[57]
  • Evidence from eggshells of Troodon, interpreted as indicative of endothermic physiology but also of reptile-like eggshell mineralization proces, is presented by Tagliavento et al. (2023).[58]

Sauropodomorph research
  • Lockley et al. (2023) evaluate a number of trackways assigned to basal saurischians, including those belonging to the ichnogenera Otozoum, Pseudotetrasauropus, Evazoum, and Kalosauropus, and examine their implications on the gait of "prosauropods".[59]
  • Aureliano et al. (2023) provide evidence of the presence of an invasive air sac system in Macrocollum itaquii.[60]
  • A study on the evolution of sauropod body mass is published by D'Emic (2023), who finds that sauropods independently surpassed the maximum body mass of terrestrial mammals at least three dozen times in their evolutionary history.[61]
  • Description of new eusauropod fossil material from the Middle Jurassic Dongdaqiao Formation (China) is published by Wei et al. (2023), who interpret these findings as showing that gigantic sauropods were more widespread than previously known during the Middle Jurassic.[62]
  • A juvenile sauropod specimen, most closely resembling early-diverging eusauropods from the Middle Jurassic but sharing some derived features with the Late Jurassic mamenchisaurids and neosauropods, is described from the Middle Jurassic Dongdaqiao Formation (East Tibet, China) by An et al. (2023).[63]
  • The holotype of Mamenchisaurus sinocanadorum is redescribed by Moore et al. (2023), who also interpret Bellusaurus and Daanosaurus as juvenile mamenchisaurids.[64]
  • Cervical vertebra representing the first record of a titanosauriform sauropod from the Lower Cretaceous Kanmon Group (Japan) is described by Tatehata, Mukunoki & Tanoue (2023).[65]
  • Cruzado-Caballero et al. (2023) describe two new cases of caudal pathology in titanosaurs from the Late Cretaceous of Argentina and evaluate these cases for interpreting the commonness of pathology occurring in the fossil record.[66]
  • New specimen of Diamantinasaurus matildae, including the skull preserving cranial elements not previously known for this taxon and showing similarities with the skull of Sarmientosaurus musacchioi, is described from the Upper Cretaceous Winton Formation (Australia) by Poropat et al. (2023).[67]
  • Dhiman et al. (2023) report the discovery of 92 titanosaur egg clutches from the Upper Cretaceous Lameta Formation (Madhya Pradesh, India), including three types of clutches and assigned to six oospecies, interpret their findings as suggestive of higher diversity of titanosaur taxa from the Lameta Formation than indicated by body fossils, and evaluate the implications of the studied egg clutches for the knowledge of the reproductive biology of titanosaurs.[68]
  • A sauropod tooth assigned to the family Opisthocoelicaudiidae, representing the first record of a sauropod from Late Cretaceous Russia, is described from the Udurchukan Formation, (Russia) by Averianov, Bolotsky, and Bolotsky (2023).[69]

Ornithischian research
  • A study on the biomechanical properties of the skulls of Heterodontosaurus tucki, Lesothosaurus diagnosticus, Scelidosaurus harrisonii, Hypsilophodon foxii and Psittacosaurus lujiatunensis is published by Button et al. (2023), who interpret their findings as indicative of limited functional convergence among studied taxa, which achieved comparable performance of the feeding apparatus through different adaptations.[70]
  • A study on the evolution of forelimb muscle mechanics and function in ornithischian dinosaurs is published by Dempsey et al. (2023), who interpret their findings as indicating that thyreophorans, ornithopods and ceratopsians evolved quadrupedality through different patterns of rearrangement of forelimb musculature.[71]
  • Review of the fossil record of ornithischian dinosaurs from Southeast Asia and southern China is published by Manitkoon et al. (2023)[72]
  • Surmik et al. (2023) study ossified tendons of specimens of Pinacosaurus grangeri, Edmontosaurus regalis/"Ugrunaaluk kuukpikensis" and Homalocephale calathocercos, reporting the presence of collagenous fibre bundles and likely fibril bundles, blood vessels and associated cells in some of the studied samples, and argue that ossified tendons can be a source of molecular preservation in dinosaurs.[73]
  • Description of the skull osteology of Manidens condorensis is published by Becerra et al. (2023).[74]

Thyreophoran research
  • A study on the phylogenetic relationships of thyreophorans is published by Raven et al. (2023), who identify four distinct ankylosaur clades, with the long-standing clade Nodosauridae recovered as paraphyletic; they suggest replacing the latter with the names Panoplosauridae, Polacanthidae, and Struthiosauridae.[75]
  • A study on the use of quadrapediality in Scutellosaurus lawleri, and on its implications for locomotor behavior evolution in dinosaurs, is published by Anderson et al. (2023), who interpret Scutellosaurus as mainly being a biped, and suggest quadrapediality was used during specific activities.[76]
  • Galton (2023) describes a right sternal bone of a specimen of Stegosaurus from the Carnegie Quarry at Dinosaur National Monument (Morrison Formation; Utah, United States) and reevaluates three putative sternal bones from Como Bluff (Wyoming, United States) described by Gilmore (1914),[77] arguing that they are neither sternal bones nor fossils of Stegosaurus.[78]
  • Description of nodosaurid osteoderms from the Late Cretaceous Snow Hill Island Formation (Antarctica) is published by Brum et al. (2023), who suggest that osteoderm structure may have helped nodosaurids colonize high-latitude environments more easily.[79]
  • Yoshida, Kobayashi & Norell (2023) report the discovery of fossilized larynx of a specimen of Pinacosaurus grangeri from the Campanian of Ukhaa Tolgod (Mongolia), and interpret its anatomy as indicating that Pinacosaurus might have been capable of vocalization and, like extant birds, might have possessed a non-laryngeal vocal source and used larynx as a sound modifier.[80]
  • Tumanova et al. (2023) describe anomalies within the airway and sinuses of a skull of a specimen of Tarchia, which were only detected while CT scanning the specimen, and which might have been caused by infection and/or trauma.[81]

Cerapod research
  • Redescription of Cumnoria prestwichii is published by Maidment et al. (2023), who recover Cumnoria as a non-ankylopollexian iguanodontian, and consider it to be distinct from Camptosaurus.[82]
  • García-Cobeña, Cobosa & Verdú (2023) describe bone and trace fossils of styracosternan ornithopods from the Lower Cretaceous El Castellar Formation and Camarillas Formation (Spain), including manus-pes track set from the Camarillas Formation indicative of quadrupedal locomotion, assigned to the ichnogenus Caririchnium and produced by large styracosternans related to Iguanodon.[83]
  • Description of new hadrosaurid fossils from the Upper Cretaceous Kakanaut Formation (Chukotka, Russia) and a study on their histology is published by Bapinaev et al. (2023), who interpret the studied fossils as possibly indicative of the presence of two hadrosaurid taxa im the Kakanaut fauna, and interpret the histology of the studied bones as possibly indicating that Arctic hadrosaurids of Chukotka were year-round residents of polar ecosystems.[84]
  • A study on the cranial suture interdigitation in Hadrosaurids, using data gathered from Gryposaurus and Corythosaurus is published by Dudgeon and Evans (2023) who find that suture interdigitation increased across Hadrosaurid ontogeny, that Lambeosaurines had higher suture interdigitation than other Iguanodontians, and that increased suture complexity coincided with Lambeosaurine crest evolution.[85]
  • A study on the anatomy of the holotype specimen of Gravitholus albertae is published by Dyer, Powers & Currie (2023), who interpret both Gravitholus albertae and Hanssuesia sternbergi as likely junior synonyms of Stegoceras validum.[86]
  • A study on the endocranial morphology of Liaoceratops yanzigouensis is published by Yang et al. (2023), who find that the brain, olfactory bulb and inner ear of Liaoceratops more closely resemble those observed in Psittacosaurus than those in more derived ceratopsians.[87]
  • A review of the cranial evolution in Ceratopsia is published by Nabavizadeh (2023).[88]

Birds

New bird taxa
Name Novelty Status Authors Age Type locality Country Notes Images
Anachronornis[89] Gen. et sp. nov. Valid Houde, Dickson & Camarena Thanetian Willwood Formation  United States
( Wyoming)		 A basal anseriform of the new family Anachronornithidae. The type species is A. anhimops.

Avolatavis europaeus[90]

Sp. nov

Valid

Mayr & Kitchener

Eocene

London Clay

 United Kingdom

A member of the family Vastanavidae.

Castignovolucris[91]

Gen. et sp. nov

Buffetaut, Angst & Tong

Late Cretaceous (probably late Campanian)

 Argiles et Grès à Reptiles Formation

 France

A member of Enantiornithes. The type species is C. sebei.

Cratonavis[92]

Gen. et sp. nov

Valid

Li et al.

Early Cretaceous

Jiufotang Formation

 China

A non-ornithothoracine pygostylian. The type species is C. zhui.
Danielsavis[89] Gen. et sp. nov. Valid Houde, Dickson & Camarena Ypresian London Clay Formation  United Kingdom A basal anseriform. The type species is D. nazensis.
Dynatoaetus[93] Gen. et sp. nov. Valid Mather et al. Chibanian Mairs Cave  Australia An Accipitrid, the type species is D. gaffae.

Eotrogon[94]

Gen. et sp. nov

Valid

Mayr, De Pietri & Kitchener

Eocene (Ypresian)

London Clay

 United Kingdom

A trogon. The type species is E. stenorhynchus.

Kumimanu fordycei[95]

Sp. nov

Valid

Ksepka et al.

Paleocene (Teurian)

Moeraki Formation

 New Zealand

An early penguin.

Macronectes tinae[96]

Sp. nov

Valid

Tennyson & Salvador

Pliocene (Waipipian)

Tangahoe Formation

 New Zealand

A member of the genus Macronectes.

Murgonornis[97] Gen. et sp. nov Worthy et al. Eocene  Australia A presbyornithid. The type species is M. archeri

Papasula abbotti nelsoni[98]

Ssp. nov

Valid

Hume

Holocene

 Mauritius

A subspecies of Abbott's booby.

Papulavis[99]

Gen. et sp. nov

In press

Mourer-Chauviré et al.

Eocene (Ypresian)

 France

A bird classified as cf. Aramidae. The type species is P. annae.
Pelecanus paranensis[100] Sp. nov Noriega et al. Miocene Paraná Formation  Argentina A pelican.

Petradyptes[95]

Gen. et sp. nov

Valid

Ksepka et al.

Paleocene (Teurian)

Moeraki Formation

 New Zealand

An early penguin. The type species is P. stonehousei.

Rhynchaeites litoralis[101]

Sp. nov

Valid

Mayr & Kitchener

Eocene (Ypresian)

London Clay

 United Kingdom

A member of the family Threskiornithidae.

Sericuloides[102]

Gen. et sp. nov

Valid

Nguyen

Oligocene

Riversleigh World Heritage Area

 Australia

A bowerbird. The type species is S. marynguyenae.
Sororavis[103] Gen. et sp. nov Valid Mayr & Kitchener Eocene (Ypresian) London Clay  United Kingdom A member of the family Morsoravidae. the type species S. solitarius.

Tegulavis[99]

Gen. et sp. nov

In press

Mourer-Chauviré et al.

Eocene (Ypresian)

 France

A bird classified as cf. Galliformes. The type species is T. corbalani.

Tynskya brevitarsus[90]

Sp. nov

Valid

Mayr & Kitchener

Eocene

London Clay

 United Kingdom

A member of the family Messelasturidae.

Tynskya crassitarsus[90]

Sp. nov

Valid

Mayr & Kitchener

Eocene

London Clay

 United Kingdom

A member of the family Messelasturidae.
Yarquen[104] Gen. et sp. nov Tambussi et al. Miocene Collón Curá Formation  Argentina An owl in the family Strigidae. The type species is Y. dolgopolae.

Ypresiglaux[105]

Gen. et sp. et comb. nov

Valid

Mayr & Kitchener

Early Eocene

London Clay

 United Kingdom
 United States
( Virginia)

An owl. The type species is Y. michaeldanielsi; genus also includes "Eostrix" gulottai Mayr (2016). Announced in 2022; the final article version was published in 2023.

Avian research
  • Macaulay et al. (2023) report that, in spite of the differences of body shape, there is overall no difference in the position of whole-body centre-of-mass between birds and non-avian theropods, but rather that there is such difference between hindlimb-dominated predominantly terrestrial taxa and forelimb-dominated predominantly volant taxa regardless of their phylogenetic placement, and argue that the fully crouched bipedalism seen in modern birds evolved after powered flight.[106]
  • A study comparing dentin and enamel microstructure in Microraptor, Anchiornis, Sapeornis and Longipteryx, providing evidence of microscopic modifications in tooth enamel, dentin and cementum between early birds and other theropods, as well as previously unrecognized plasticity in the developmental mechanisms controlling tooth microstructure in Mesozoic toothed birds, is published by Wang et al. (2023).[107]
  • Five specimens of Sapeornis chaoyangensis with different-preserved feathers are reported from the Early Cretaceous Jehol Biota (China) by Zhao et al. (2023), who examine their implications for the taphonomy of soft tissues from the Jehol Biota.[108]
  • An enantiornithine specimen from the La Huérguina Formation closely resembling Concornis is described by Nebreda et al. (2023).[109]
  • O'Connor et al. (2023) describe feathers of a young enantiornithine individual from the Cretaceous amber from Myanmar, and interpret this finding as indicating that immature enantiornithines rapidly molted body feathers.[110]
  • A study aiming to determine the diets of members of the family Pengornithidae is published by Miller et al. (2023), who report that Pengornis, Parapengornis and Yuanchuavis show adaptations for vertebrate carnivory.[111]
  • Wang (2023) describes a new specimen of Parabohaiornis martini with a well-preserved skull from the Lower Cretaceous Jiufotang Formation (China), and reports the presence of the plesiomorphic temporal and palatal configurations (similar to those of non-avian dinosaurs) in the skull of Parabohaiornis.[112]
  • Clark et al. (2023) attempt to determine the dietary habits of longipterygids, reporting dental features indicative of carnivory, with additional support for insectivory.[113]
  • Lowi-Merri et al. (2023) provide evidence of soaring and foot-propelled swimming capabilities of Ichthyornis.[114]
  • Blood flow rates in the femora of a variety of extinct and extant avialans are estimated by Hu et al. (2023).[115]
  • A review and update of the Cenozoic fossil record of birds in Argentina is published by Tambussi, Degrange & de Mendoza (2023).[116]
  • Buffetaut (2023) reports the discovery of a plaster cast of the lost femur of Struthio anderssoni from the late Pleistocene deposits of the Upper Cave at Zhoukoudian (China), and transfers the species S. anderssoni to the genus Pachystruthio.[117]
  • A study on the evolutionary history of the elephant birds, based on data from fossil eggshells, is published by Grealy et al. (2023), who interpret their findings as supporting the placement of Mullerornis into a separate family, as well as indicative of the existence of a genetically distinct lineage of Aepyornis in Madagascar's far north, report evidence of divergence within Aepyornis corresponding with the onset of the Quaternary, and tentatively advocate synonymising Vorombe titan with Aepyornis maximus.[118]
  • Changes in body size of birds from the Yucatán peninsula since the Late Pleistocene are documented by Silva‐Martínez et al. (2023).[119]
  • The impact of including fossil taxa on inferring the ancestral morphology of the quadrate in Galloanserae is studied by Kuo, Benson & Field (2023).[120]
  • Fossils of small rails from the late Pleistocene and early Holocene of the Southern High Plains are described by Moretti & Johnson (2023).[121]
  • Ecomorphology of the penguin wing is studied by Haidr (2023), finding that Madrynornis resembled extant piscivorous penguins in its wing morphology.[122]
  • A skull of a small penguin, possibly representing a new species belonging to the genus Spheniscus, Eudyptula or to a new genus ancestral to both listed genera, is described from the Miocene Bahía Inglesa Formation (Chile) by Acosta Hospitaleche & Soto-Acuña (2023).[123]
  • Figueiredo et al. (2023) report a partial coracoid of the genus Morus from the middle Miocene (Langhian) of the Setúbal Peninsula (Portugal), an instance that represents the first Miocene sulid described from the Iberian Peninsula.[124]
  • Coprolites of bearded vultures from the Pleistocene of Portugal are described by Sanz et al. (2023).[125]
  • A tarsometatarsus of a cinereous vulture from the Late Pleistocene Gansuiji Formation (Japan) is described by Matsuoka & Hasegawa (2023), representing the first fossil record of this species from Japan.[126]

Pterosaurs

New pterosaur taxa
Name Novelty Status Authors Age Type locality Country Notes Images

Balaenognathus[127]

Gen. et sp. nov

In press

Martill et al.

Late Jurassic (late Kimmeridgian to Tithonian)

Torleite Formation

 Germany

A member of the family Ctenochasmatidae. The type species is B. maeuseri.

Eopteranodon yixianensis[128]

Sp. nov

Zhang et al.

Early Cretaceous

Yixian Formation

 China

A member of the family Tapejaridae.

Huaxiadraco[129]

Gen. et comb. nov

Valid

Pêgas et al.

Early Cretaceous

Jiufotang Formation

 China

A member of the family Tapejaridae. The type species is "Huaxiapterus" corollatus Lü et al. (2006).

Pterosaur research
  • A study on the diversification of pterosaurs during their evolutionary history, aiming to determine the factors that affected pterosaur evolution, is published by Yu, Zhang & Xu (2023).[130]
  • Review of the fossil record of Jurassic and Cretaceous pterosaurs from Gondwana is published by Pentland & Poropat (2023).[131]
  • Revision of the pterosaur assemblage from the Kem Kem Group (Morocco) is published by Smith et al. (2023), who provide revised diagnoses for Afrotapejara zouhrii and Alanqa saharica, and report at least three distinct jaw morphotypes which cannot be referred to any previously named species.[132]
  • Jagielska et al. (2023) describe a non-pterodactyloid pterosaur specimen from the Bathonian Lealt Shale (Isle of Skye, Scotland, United Kingdom), preserving metatarsal and caudal vertebrae which are considerably larger than corresponding bones in the holotype of Dearc sgiathanach.[133]
  • A study on the surface of the holotype specimen of Scaphognathus crassirostris, providing evidence of the presence of six different types of pycnofibers, is published by Henkemeier, Jäger & Sander (2023).[134]
  • A study on the microstructure of the tooth and periodontium attachment tissues of Pterodaustro guinazui is published by Cerda & Codorniú (2023), who report that teeth of this pterosaur were set in a groove with no interdental separation, and find no evidence for gomphosis or the presence of replacement teeth.[135]
  • Description of the pectoral girdle morphology and histology in Hamipterus, providing evidence of both the similarities and differences between the flight apparatus of pterosaurs and birds, is published by Wu et al. (2023).[136]
  • Smith, Martill & Zouhri (2023) reinterpret a purported shark spine from the Cenomanian Cambridge Greensand Member of the West Melbury Marly Chalk Formation (Cambridgeshire, United Kingdom) as a jaw fragment of an azhdarchoid distinct from Ornithostoma sedgwicki, but sharing a distinctive morphology with jaw fragments reported from the Kem Kem Beds of Morocco.[137]
  • New Jehol tapejarid skeleton, probably belonging to a specimen of Sinopterus dongi and providing new information on the skull anatomy in this species, is described by Zhou, Miao & Andres (2023).[138]
  • A study on the affinities of "Tupuxuara" deliradamus is published by Cerqueira, Müller & Pinheiro (2023), who interpret this pterosaur as a tapejarine.[139]
  • A study on the ontogeny of Caiuajara dobruskii, as inferred from its bone histology, is published by de Araújo et al. (2023).[140]

Other archosaurs
Name Novelty Status Authors Age Type locality Country Notes Images

Amanasaurus[141]

Gen. et sp. nov

Müller & Garcia

Late Triassic (Carnian)

Candelária Sequence of the Santa Maria Supersequence

 Brazil

A member of the family Silesauridae. The type species is A. nesbitti.

General research
  • Wang, Claessens & Sullivan (2023) establish skeletal features associated with the attachment of uncinate processes to vertebral ribs in extant birds and crocodilians, attempt to determine their distribution in fossil archosaurs, and interpret their findings as indicating that cartilaginous uncinate processes were plesiomorphically present (and likely had a ventilatory function) in dinosaurs, and maybe even in archosaurs in general.[142]
  • Aureliano et al. (2023) present the criteria which can be used to distinguish between lamellar bone fibres, Sharpey's fibres (tendon insertions) and air sac attachments in the bones of fossil archosaurs.[143]
  • Evidence indicative of Valanginian maximum age for the Urho Pterosaur Fauna from the Tugulu Group in Junggar Basin (Xinjiang, China) is presented by Zheng et al. (2023).[144]
  • Putative avialan teeth from the Late Cretaceous of Alberta, Canada are reinterpreted as belonging to crocodylians by Mohr, Acorn & Currie (2023).[145]
  • Taphonomic effects of fossilization on melanin in feathers are experimentally investigated by Roy et al. (2023).[146]

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