Results 1 to 10 of about 139,127 (283)

A new genus of lance lacewings from the Middle Jurassic of Inner Mongolia, China [PDF]

open access: yesActa Palaeontologica Polonica, 2020
Fossils of Osmylinae are rare, currently only one fossil genus of this subfamily is known, Lithosmylus which is recorded from the late Eocene Florissant Formation of USA. Herein, we report a new Osmylinae genus with two new species, Vetosmylus tentus gen.
Yiming Ma   +3 more
doaj   +1 more source

Molar morphology and occlusion of the Early Jurassic mammaliaform Erythrotherium parringtoni [PDF]

open access: yesActa Palaeontologica Polonica, 2022
The South African Early Jurassic morganucodontan Erythrotherium is considered by some authors to be potentially synonymous with Morganucodon, due to similar tooth morphology.
KAI R.K. JÄGER   +3 more
doaj   +1 more source

Comparative bone microstructure of three archosauromorphs from the Carnian, Late Triassic Chañares Formation of Argentina [PDF]

open access: yesActa Palaeontologica Polonica, 2020
The Chañares Formation exhibits one of the most important archosauriform records of early Carnian ecosystems. Here we present new data on the palaeohistology of Chañares archosauriforms and provide new insights into their paleobiology, as well as ...
Jordi Alexis Garcia Marsà   +2 more
doaj   +1 more source

A new Early Cretaceous flea from China [PDF]

open access: yesActa Palaeontologica Polonica, 2020
Fleas are highly specialized holometabolic insects. So far, only 16 species of fossil fleas in five families have been reported due to the rare fossil records.
Yanjie Zhang   +4 more
doaj   +1 more source

Seazzadactylus venieri gen. et sp. nov., a new pterosaur (Diapsida: Pterosauria) from the Upper Triassic (Norian) of northeastern Italy [PDF]

open access: yesPeerJ, 2019
A new non-monofenestratan pterosaur with multicusped dentition, Seazzadactylus venieri, is described from the Upper Triassic (middle-upper Norian) of the Carnian Prealps (northeastern Italy). The holotype of S. venieri preserves a complete mandibular and
Fabio Marco Dalla Vecchia
doaj   +2 more sources

Perinatal specimens of Maiasaura from the Upper Cretaceous of Montana (USA): insights into the early ontogeny of saurolophine hadrosaurid dinosaurs [PDF]

open access: yesPeerJ, 2018
Perinatal specimens of hadrosaurids discovered in the late 1970’s by field crews from Princeton University were significant in providing evidence of the early ontogenetic stages in North American dinosaurs.
Albert Prieto-Marquez   +1 more
doaj   +2 more sources

A New Cixiid Fossil Genus of the Tribe Acrotiarini from Mid-Cretaceous Burmese Amber (Insecta, Hemiptera, Fulgoromorpha)

open access: yesInsects, 2022
A new Burmese amber genus Maculixiusgen. nov. with its type species Maculixius jiewenaesp. nov. is described in the planthopper family Cixiidae. This new genus is unique in Burmese Cixiidae by its forewing venation, with Pcu and A1 merging in the middle ...
Menglin Wang   +2 more
doaj   +1 more source

Jaw shape and mechanical advantage are indicative of diet in Mesozoic mammals

open access: yesCommunications Biology, 2021
Jaw morphology is closely linked to both diet and biomechanical performance, and jaws are one of the most common Mesozoic mammal fossil elements. Knowledge of the dietary and functional diversity of early mammals informs on the ecological structure of ...
N. M. Morales-García   +3 more
semanticscholar   +1 more source

Correlation of Proterozoic-Phanerozoic deep wells sections targeting Aldan-Maya area petroleum potentiality estimation [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2022
The article discusses the debatable issues of well log correlation of the Riphean, Vendian, Cambrian and Mesozoic sections, promising for the search for oil and gas in the Aldan-Maya potentially petroleum bearing region. The author's proposed correlation
Fomin A.M.   +3 more
doaj   +1 more source

Geochemistry, origin and anatexis temperature of monzogranite formation in Mount Khalaj (Mashhad, Iran)

open access: yesJournal of Economic Geology, 2021
Introduction Granitoids are the main rock units in the continental crust. Study of granitoids reveals significant information on tectonic mantle and upper crust.
Ramin Samadi   +2 more
doaj   +1 more source

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