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Middle Jurassic Biostratigraphyof Argentina
Geobios, 1994Abstract The Middle Jurassic of west-central Argentina comprises several stratigraphic sequences characterized on thebasis of ammonoids, bivalves, brachiopods, foraminifers and ostracods. Aalenian and Bajocian ammonoids belong in the Bredyia manflasensis, “Zurcheria” groeberi Puchenquia malarguensis, Pseudotoites singularis, Emileia giebeli ...
Alberto C. Riccardi +3 more
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A new genus of Praemordellinae from the Middle Jurassic of China
The Anatomical Record, 2023AbstractJuramordella asperula gen. et sp. nov. (Coleoptera: Tenebrionoidea) is described based on a specimen from the Middle Jurassic Daohugou Biota, Nincheng County, Inner Mongolia of China. Juramordella asperula is distinguished from other Praemordellinae mainly for roughly punctate elytra, absence of subapical or lateral ridges on all tibiae and ...
Yifei Sun +4 more
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Discovery of Thripida from the Middle Jurassic Yan’an Formation
Zootaxa, 2023Thysanoptera, commonly known as thrips, constitutes a relatively diminutive insect order within the superorder Thripida Fallen, 1814, with at least 6000 described extant species. Thripida has been divided into three clades: Panthysanoptera Nel et al., 2012, Lophioneurida Tillyard, 1921, and Westphalothripidesidae Nel et al., 2012, primarily based on ...
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Ecological patterns in middle Jurassic
2005Gryphaea is a typical oyster, sensitive and reactive to the environment and thus variable in aspects of form, such as the size of the attachment area. Nevertheless, there are regular relationships between form and specific properties of the environment, at both the intra- and inter-specific levels and for various stratigraphic horizons throughout the ...
Ulf Bayer +2 more
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A monotreme-like auditory apparatus in a Middle Jurassic haramiyidan
Nature, 2021Among extant vertebrates, mammals are distinguished by having a chain of three auditory ossicles (the malleus, incus and stapes) that transduce sound waves and promote an increased range of audible-especially high-frequencies1. By contrast, the homologous bones in early fossil mammals and relatives also functioned in chewing through their bony ...
Junyou Wang +5 more
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The Middle Jurassic succession at Ketton, Rutland
Proceedings of the Geologists' Association, 2007The cement quarry at Ketton is the most important Middle Jurassic locality in inland England. For many years it has exposed the Lincolnshire Limestone, Rutland and Blisworth Limestone Formations. Excavations in the lower quarry have allowed access to the Northampton Sand and Grantham Formations, and temporarily to the Whitby Mudstone Formation, while ...
J.D. Hudson, R.G. Clements
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A Middle Jurassic mammal from Madagascar
Nature, 1999The lower molars of tribosphenic mammals (marsupials, placentals and their extinct allies) are marked, primitively, by a basined heel (talonid) acting as the mortar to the pestle of a large inner cusp (protocone) on the opposing upper teeth. Here we report the earliest tribosphenic mammal found so far, three lower teeth in a jaw fragment from Middle ...
John J. Flynn +4 more
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Jurassic faunas of the Canadian Arctic, Lower Jurassic and lowermost Middle Jurassic ammonites
1960Lower Jurassic and lower Bajocian faunas are widely distributed in the Canadian Arctic, particularly in the Arctic Archipelago, where marine lower Sinemurian, Toarcian, and Bajocian are represented. In the Aklavik Range (northeastern Richardson Mountains, Arctic Coast region) lower and upper Sinemurian rocks are present; farther to the west lower ...
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Outgrowths on Zircon in the Middle Jurassic of Yorkshire
Geological Magazine, 1937In view of Mr. J. A. Butterfield's account of outgrowths on zircon in the Millstone Grit of the Pennine region (Geol. Mag., LXXIII, 1936, 511–16), it may be of interest to record the occurrence of similar grains in the Middle Jurassic sandstones of Yorkshire.
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Harvestmen (Arachnida: Opiliones) from the Middle Jurassic of China
Naturwissenschaften, 2009Harvestmen (Arachnida: Opiliones) are familiar animals in most terrestrial habitats but are rare as fossils, with only a handful of species known from each of the Palaeozoic, Mesozoic, and Cenozoic eras. Fossil harvestmen from Middle Jurassic (ca. 165 Ma) strata of Daohugou, Inner Mongolia, China, are described as Mesobunus martensi gen. et sp.
Diying, Huang +2 more
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