A new symmetrodont mammal from the Early Cretaceous Jehol Biota of Ningcheng Basin, Inner Mongolia, Northeast China [PDF]
Acta Palaeontologica PolonicaRecently, a dinosaur assemblage with three-dimensional preservation of the Early Cretaceous Jehol Biota has been discovered in the Ningcheng Basin, Inner Mongolia, China.
Honggang Zhang +2 more
doaj +1 more source
Three new species of Paragnorimus Becker from Central America (Coleoptera: Scarabaeidae: Cetoniinae: Trichiini) with a redefinition of the genus [PDF]
, 2010 Three new species of Paragnorimus Becker are described: Paragnorimus atratus n. sp. from Guatemala, P. hondurensis n. sp. from Honduras and Nicaragua, and P. howdeni n. sp. from Guatemala.
Smith, Andrew B. T.
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The Anatomical Record, EarlyView.Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Evan Johnson‐Ransom +4 more
wiley +1 more source
Carbon loss by deciduous trees in a CO2-rich ancient polar environment [PDF]
, 2003 Fossils demonstrate that deciduous forests covered the polar regions for much of the past 250 million years 1 when the climate was warm and atmospheric CO2 high 2.
Beerling, D.J. +2 more
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Towards a sequence stratigraphic solution set for autogenic processes and allogenic controls: Upper Cretaceous strata, Book Cliffs, Utah, USA [PDF]
, 2016 Upper Cretaceous strata exposed in the Book Cliffs of east–central Utah are widely used as an archetype for the sequence stratigraphy of marginal-marine and shallow-marine deposits.
Hampson, GJ
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Osteohistology of two phorusrhacids reveals uninterrupted growth strategy
The Anatomical Record, EarlyView.Abstract Phorusrhacidae were apex predators that primarily dominated South America ecosystems for at least 40 million years with their imposing size and predatory lifestyle—yet some aspects of their biology remain poorly understood. Osteohistology is a tool for understanding growth dynamics and biomechanical adaptations.
Lotta Dreyer +2 more
wiley +1 more source
What, if anything, is a Paratrochamminoides? A key to the morphology of the Cretaceous to Cenozoic species of Conglophragmium and Paratrochamminoides (Foraminifera) [PDF]
, 2004 We present a review of the current taxonomical status of the genus Paratrochamminoides Soliman, 1972. We recognise five main subgroups of this genus based upon the following modes of coiling: trochospiral, streptospiral, glomospiral, triloculine or ...
Kaminski, M.A., Kuhnt, W.
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A reappraisal of the Italian record of the Cretaceous pachycormid fish Protosphyraena Leidy, 1857 [PDF]
, 2017 The genus Protosphyraena is known mainly from partial remains, consisting of isolated blade-like teeth, conical rostra and scythe-like pectoral fins. This paper provides a new insight into partial specimens of the genus Protosphyraena from the Cretaceous
Amalfitano, Jacopo +3 more
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Nasal soft‐tissue anatomy of Triceratops and other horned dinosaurs
The Anatomical Record, EarlyView.Abstract Although ceratopsid dinosaurs possess a characteristically hypertrophied narial region, soft‐tissue anatomy associated with such a skeletal structure and their biological significance remain poorly understood. The present study provides the first comprehensive hypothesis on the soft‐tissue anatomy in the ceratopsid rostrum based on the Extant ...
Seishiro Tada +5 more
wiley +1 more source
Plant microfossil record of the terminal Cretaceous event in the western United States and Canada [PDF]
Plant microfossils, principally pollen grains and spores produced by land plants, provide an excellent record of the terminal Cretaceous event in nonmarine environments.
Fleming, R. F., Nichols, D. J.
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