Results 211 to 220 of about 12,075 (246)

Paleobiogeography of Early Cretaceous Ammonoids

2015
International ...
Lehmann, Jens, Ifrim, Christina, Bulot, Luc, Frau, Camille   +3 more
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Early Cretaceous Spider Web with Its Prey

Science, 2006
Araneoid spiders are renowned for their efficient capture of flying insects with intricate aerial webs. Origins of this web structure are obscure, however, because they rarely fossilize. Reported here is an exceptional situation of insects trapped in part of a gummy aerial web preserved in a runnel of amber from Spain that is ~110 million years old ...
Enrique, Peñalver, David A, Grimaldi, Xavier, Delclòs   +2 more
openaire   +2 more sources

An Early Cretaceous eutherian and the placental–marsupial dichotomy

Nature, 2018
Molecular estimates of the divergence of placental and marsupial mammals and their broader clades (Eutheria and Metatheria, respectively) fall primarily in the Jurassic period. Supporting these estimates, Juramaia-the oldest purported eutherian-is from the early Late Jurassic (160 million years ago) of northeastern China.
Shundong, Bi, Xiaoting, Zheng, Xiaoli, Wang, Natalie E, Cignetti, Shiling, Yang, John R, Wible   +5 more
openaire   +2 more sources

Palaeobiogeography of the Early Cretaceous corals

Palaeogeography, Palaeoclimatology, Palaeoecology, 1992
Abstract A compilation of the geographical distribution of about 1000 species of corals from the Early Cretaceous (Valanginian to Cenomanian) is presented. After the reefal regression during the latest Jurassic, no corals appear in the Berriasian, and only a few species are known from the Valanginian and Hauterivian.
openaire   +1 more source

A eutherian mammal from the Early Cretaceous of Russia and biostratigraphy of the Asian Early Cretaceous vertebrate assemblages

Lethaia, 2000
Prokennalestes abramovi n.sp. is described based on M2 from the upper Barremian-middle Aptian (Early Cretaceous) Mogoito locality in Transbaikalia, Russia. It differs from the Mongolian species of Prokennalestes (Khoboor, early Albian) by a combination of one primitive character (steeper and shorter lingual slopes of the paracone and metacone), one ...
Alexander Averianov, Pavel Skutschas
openaire   +1 more source

Flowers from the Early Cretaceous

2010
Fossil angiosperms from the Early Cretaceous are of special interest because currently the earliest widely-accepted angiosperms are from this age. Chaoyangia, Archaefructus, Sinocarpus, and Callianthus are four representative angiosperms from the Yixian Formation (125 Ma, Early Cretaceous).
openaire   +1 more source

Fossil evidence of core monocots in the Early Cretaceous

Nature Plants, 2019
All the major clades of angiosperms have a fossil record that extends back to more than 100 million years ago (Early Cretaceous), mostly in agreement with molecular dating. However, the Early Cretaceous record of monocots is very poor compared to other angiosperms.
Clément Coiffard, Nikolay Kardjilov, Ingo Manke, Mary E. C. Bernardes-de-Oliveira   +3 more
openaire   +2 more sources

Evidence of mycoparasitism and hypermycoparasitism in Early Cretaceous amber

Mycological Research, 2007
Evidence of mycoparasitism and hypermycoparasitism is demonstrated in Early Cretaceous Burmese amber. The agaric, Palaeoagaracites antiquus gen. sp. nov., is parasitized by the mycoparasite, Mycetophagites atrebora gen. sp. nov., which in turn is parasitized by the hyperparasite, Entropezites patricii gen. sp. nov.
George O, Poinar, Ron, Buckley
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Palaeontology: An Early Cretaceous pellet

2011
Peer ...
Sanz, José Luis, Chiappe, Luis M., Fernández-Jalvo, Yolanda, Ortega, Francisco, Sánchez Chillón, Begoña, Poyato-Ariza, Francisco J., Pérez-Moreno, Bernardino P.   +6 more
openaire   +1 more source

A domed pachycephalosaur from the early Cretaceous of Mongolia

Nature
The dome-headed pachycephalosaurians are among the most enigmatic dinosaurs. Bearing a hypertrophied skull roof and elaborate cranial ornamentation, members of the clade are considered to have evolved complex sociosexual systems1-3. Despite their importance in understanding behavioural ecology in Dinosauria, the absence of uncontested early diverging ...
Tsogtbaatar Chinzorig, Ryuji Takasaki, Junki Yoshida, Ryan T. Tucker, Batsaikhan Buyantegsh, Buuvei Mainbayar, Khishigjav Tsogtbaatar, Lindsay E. Zanno   +7 more
openaire   +2 more sources