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4 results for “North Qilian Mountains”
Data from: Katian (Late Ordovician) trilobites of the North Qilian Mountains and their palaeogeographical implications for the Proto-Tethys Archipelagic Ocean (PTAO)
<p class="MsoNormal"><span>Trilobites from the middle Koumenzi Formation (Katian, Upper Ordovician) of the North Qilian Mountains, Menyuan, northeastern Qinghai Province are systematically documented for the first time. The fauna consists of five families, seven genera and seven species, amongst which one is new (</span><em><span>Remopleurides</span> <span>zhangi</span> </em><span>sp. nov.), showing a close relationship to those of the Kazakh terranes (such as Chu-Ili terrane, Chingiz-Tarbagatai area and KNNTS (Karatau-Naryn and North-Tien Shan Microcontinents)), North China and Laurentia palaeoplates during the Katian (Late Ordovician). The cluster and Non-metric Multidimensional Scaling analyses of the Middle<span class="fontstyle01">–Late Ordovician (</span>late Darriwilian<span class="fontstyle01">–</span>Katian<span class="fontstyle01">) trilobite faunas with 299 genera or subgenera from 46 horizons of 37 areas, provide valuable information for the palaeogeographical reconstruction of the </span>Proto-Tethys Archipelagic Ocean (PTAO) of this interval. The Qilian terrane and adjacent areas are essential components of the PTAO, some of which include the Qilian terrane (QT), the North Qilian Mountains area (NQ), the Altun faulted terrane (AFT), the Hexi Corridor area (HX) and the East Qinling terrane (EQT). Their relative positions within the PTAO are inferred by the palaeobiogeography of trilobite faunas. Based on further discussions on the spatiotemporal distribution of those faunas<span class="fontstyle01">, the </span></span><em><span>Pliomerina</span></em><span> and/or </span><em><span>Sinocybele</span> </em><span>Province of the Middle<span class="fontstyle01">–Late Ordovician (</span>late Darriwilian<span class="fontstyle01">–</span>Katian<span class="fontstyle01">) age is defined as a trilobite faunal province of the PTAO. </span>Moreover, a distinct faunal subprovince, essentially comprised of the South China Palaeoplate and its neighbours (e.g. Tarim, Annamia, Sibuma, East Qinling, Turkestan-Alai and probably Talesh), might be surrounded by the equatorial cold-water tongue.</span></p>
Data from: The Anisian (Middle Triassic) brachiopods from the southern Qilian Mountains, north-western China
<p><span>The Anisian (Middle Triassic) witnessed the diversification of brachiopods after the Permian/Triassic (P/Tr) extinction. The Anisian brachiopod fauna from the southern Qilian Mountains in north-western China has the highest taxonomic diversity at the species level among coeval faunas worldwide. Nevertheless, many taxa from this remote region remain poorly defined and therefore require emendation. Here we describe 23 species (including two uncertain species) in 15 brachiopod genera based on well-preserved carbonate and silicified specimens collected from the Anisian Dajialian and Qieermagou formations in Tianjun, southern Qilian Mountains. Two new genera (<em>Crenulatomargus</em>, <em>Tianjunospina</em>) and six new species (<em>Costirhynchopsis</em> <em>xui</em>, <em>Crenulatomargus</em> <em>terebratuliformis</em>, <em>Schwagerispira</em> <em>elegans</em>, <em>Lepismatina</em>? <em>inusitata</em>, <em>Tianjunospina</em> <em>junheensis</em>, <em>Qilianoconcha</em> <em>circularis</em>) are erected. The diagnoses of <em>Triasorhynchia</em>, <em>Yangkongia</em>, <em>Sinucostella</em>, <em>Aequspiriferina</em>, <em>Qilianoconcha</em>, and <em>Parantiptychia</em> are emended. Besides, the genus <em>Eoantiptychia</em> and the family Triasorhynchiidae are regarded as junior synonyms of <em>Qilianoconcha</em> and Tetrarhynchiidae, respectively. Systematic description and taxonomic emendation show that 56 species (including seven uncertain species) in 26 genera are confirmed in the southern Qilian brachiopod fauna. Network analysis of 14 brachiopod faunas worldwide shows that six groups were detected during the Anisian (Qingyan, southern Qilian–western Qinling, Himalaya–northern Siberia, central Qinghai, New Zealand, and Europe/western Tethys). Compared with those from the western Tethys, the eastern Tethyan faunas are less allied to each other. Except for the assemblage from the adjacent western Qinling area, other coeval faunas have much lower affinities with the Qilian fauna.</span></p>
Data from: Katian (Late Ordovician) trilobites of the North Qilian Mountains and their palaeogeographical implications for the Proto-Tethys Archipelagic Ocean (PTAO)
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Data from: The Anisian (Middle Triassic) brachiopods from the southern Qilian Mountains, north-western China
Open the record for dataset details and reuse information.
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