Results 201 to 210 of about 1,776,549 (292)

Relationship between carina size and sternum morphology in birds reflects physical constraints of body size and flight style

Journal of Anatomy, EarlyView.
Sternum morphology varies among birds and is a function of body mass and order. The area of the sternum is inversely related to the area of the keel suggesting that the increase in bone mass associated with a large keel has been mitigated by a reduction in bone mass of the sternum.
D. C. Deeming
wiley   +1 more source

New fossil evidence from the Late Cretaceous of Europe (southern France) deepens the origin of Salamandridae (Urodela) and refines the biogeography of the family. [PDF]

Sci Rep
Macaluso L, Jansen O, Valentin X, Walter JD, Otero O, Amiot R, Garcia G.   +6 more
europepmc   +1 more source

Ultra-depleted hydrogen isotopes in hydrated glass record Late Cretaceous glaciation in Antarctica. [PDF]

Nat Commun, 2022
Nelson DA, Cottle JM, Bindeman IN, Camacho A.   +3 more
europepmc   +1 more source

A description of dental microanatomy and implantation geometry in Chamaeleonidae

Journal of Anatomy, EarlyView.
A reassessment of the dental histology in adult chamaeleons reveals the presence of periodontal ligament. Alongside alveolar bone and cementum, these tissues together constitute a compacted and remodelled tripartite periodontium. Our findings include the novel observation of plicidentine‐like protuberances of dentine within underlying bone.
Giles D. Sukkert, Ilaria Paparella, Michael R. Doschak, Aaron R. H. LeBlanc, Michael W. Caldwell   +4 more
wiley   +1 more source

The taphonomic puzzle of Notothylacites filiformis: reinterpretation of bryophyte fossils from the Late Cretaceous of Czechia reveals the co-occurrence of hornworts and liverworts. [PDF]

Ann Bot
Veselá V, Svobodová M, Kadlecová V, Dašková J, Kvaček J.   +4 more
europepmc   +1 more source

Rapid growth in Late Cretaceous sea turtles reveals life history strategies similar to extant leatherbacks. [PDF]

PeerJ, 2023
Wilson LE.
europepmc   +1 more source

Widespread complex enameloid microstructure in teeth and rostral denticles of Cretaceous sclerorhynchoid skates (Rajiformes: †Sclerorhynchoidei)

Journal of Anatomy, EarlyView.
This article demonstrates that the teeth and rostral denticles of an extinct clade of sawfish‐like skates display an extremely derived enameloid microstructure, similar to what is known among sharks. The presence of tooth‐like enameloid microstructure in dermal denticles opens new perspectives about the origins and development of chondrichthyan ...
Endy Chateauneuf‐Gautier, Guillaume Guinot   +1 more
wiley   +1 more source

First unambiguous evidence of Multituberculata from the Late Cretaceous of South America. [PDF]

Sci Rep
Gelfo JN, Goin FJ, Vega NA.
europepmc   +1 more source

First titanosaur dinosaur nesting site from the Late Cretaceous of Brazil. [PDF]

Sci Rep, 2022
Fiorelli LE, Martinelli AG, da Silva JI, Hechenleitner EM, Soares MVT, Silva Junior JCG, da Silva JC, Borges ÉMR, Ribeiro LCB, Marconato A, Basilici G, da Silva Marinho T.   +11 more
europepmc   +1 more source

Heterodonty in the teeth of the turiasaurian sauropod from Angeac‐Charente (Early Cretaceous, southwestern France): Comparison of anatomical and geometric morphometric approaches

Journal of Anatomy, EarlyView.
Turiasaurian teeth from Angeac‐Charente exhibit five dental morphotypes and reveal clear heterodonty and anteroposterior size gradient. Qualitative comparative anatomy quickly and efficiently identifies morphotypes, while 3D geometric morphometrics combined with machine learning refine ambiguous cases, demonstrating that qualitative and quantitative ...
Clémence Le Gouellec, Ronan Allain, Jean Goedert, Romain Pintore, Jackson Carter, Rafael Royo‐Torres, Dominique Augier, Raphaël Cornette   +7 more
wiley   +1 more source