Time filter

Source Type

He X.,Anhui Geological Museum | He X.,CAS Institute of Botany | Wang S.,CAS Institute of Botany | Wan M.,CAS Nanjing Institute of Geology and Palaeontology | And 2 more authors.
Journal of Asian Earth Sciences | Year: 2016

The concept of the Cathaysian Flora was originally based on fossils from the Permian of central Shanxi Province in North China but is now recognized to be valid for the flora of much of East Asia during the Carboniferous and Permian periods. Although Gigantopteris Schenck ex Yabe is characteristic and often distinctive of the Cathaysian Flora in general, it has previously not been recorded in Shanxi Province within the central part of the North China. Recent investigations on the Capitanian-Wuchiapingian (middle-late Permian) flora of the Taiyuan East Hill Coalfield in Shanxi have yielded well-preserved specimens of Gigantopteris dictyophylloides Gu and Zhi within the Upper Shihhotse Formation, contained within continental red-beds interpreted as representing a floodplain environment. Discovery of G. dictyophylloides extends the palaeogeographic distribution of the genus and shows that the Permian flora of Shanxi is more typical of the Cathaysian Flora than previously thought. Results also provide new information on the ecology of G. dictyophylloides based on assessments of its occurrence within depositional sedimentary facies from which we conclude that this species thrived in alluvial-fluvial sediments on the North China Block. We also conclude that the red beds of the Upper Shihhotse Formation that yield gigantopterids most likely formed under a seasonally dry climate rather than a vague statement that these red beds were formed generally under arid conditions as previously thought. © 2015 Published by Elsevier Ltd.

Yan M.,CAS Nanjing Institute of Geology and Palaeontology | Yan M.,University of Chinese Academy of Sciences | Wan M.,CAS Nanjing Institute of Geology and Palaeontology | He X.,Anhui Geological Museum | And 2 more authors.
Palaeogeography, Palaeoclimatology, Palaeoecology | Year: 2016

Fossil charcoal is reported for the first time from a Cisuralian coal bed of the Shanxi Formation in the Qiaotou Section, Baode, Shanxi, North China. Based on anatomical characteristics, these charcoal fragments consist of coniferous or cordaitalean xylem, unidentified primary xylem and cordaitalean and possible fern leaves. These charcoal fragments represent the evidence of palaeowildfire taking place in tropical peat swamps during the Cisuralian in Cathaysia. The palaeowildfire is most likely to be a surface fire and burning litter and shrubby vegetation. Fire frequency for this early Permian peat swamp might have been on the order of 176–(294–588)–1429 years, close to modern values. Compared with modern analogues, the North China Block during the Cisuralian was probably wet in general but could be occasionally seasonally dry for short time intervals. Previous charcoal and inertinite records moreover indicate that palaeowildfires were globally common during the Cisuralian. Overall, more wildfire evidence was found in the Artinskian–Kungurian than the Asselian-Sakmarian (except in the Euramerican Realm), probably due to more suitable regional climate, vegetation to fuel fires and taphonomic circumstances. © 2016 Elsevier B.V.

Motani R.,University of California at Davis | Jiang D.-Y.,Peking University | Jiang D.-Y.,CAS Nanjing Institute of Geology and Palaeontology | Tintori A.,University of Milan | And 2 more authors.
Journal of Vertebrate Paleontology | Year: 2014

The Early Triassic ichthyopterygian Chaohusaurus chaoxianensis was previously known from juvenile specimens only. It was considered to represent immature forms of C. geishanensis, which was based on a single adult specimen, because allometric regression lines of the forelimb skeletons suggested that the two name groups fitted along a single growth trajectory. The sample size for the analysis, however, was small (n = 5). We collected new specimens of Chaohusaurus from Majiashan, Chaohu City, Anhui Province, China, through field excavations that started in 2010. New specimens included an immature individual whose forelimb resembled that of mature C. geishanensis, as well as a large adult individual whose forelimb retained the characteristics of immature C. chaoxianensis. Therefore, C. chaoxianensis is not the juvenile of C. geishanensis. With the addition of the new specimens, two growth trajectories are now clearly detected on allometric regression plots (n = 15). The two species are unambiguously distinguished from each other based on a suite of discrete characters that are diagnostic to each species, as well as statistical analyses of forelimb measurements. It is unlikely that the two forms represent the genders of a single species given that C. geishanensis is vastly outnumbered by C. chaoxianensis and completely lacking in major fossiliferous rock layers. Therefore, C. chaoxianensis should be resurrected as a valid species. © by the Society of Vertebrate Paleontology.

Zhang C.,Institute of Geoanalysis of Anhui Province | Zha S.,Institute of Geoanalysis of Anhui Province | Bi Z.,No.327 Geological Party of Anhui Province | Gong W.,Anhui Geological Museum | And 3 more authors.
Earth Science Frontiers | Year: 2016

Recently, the author has measured Baidashan group section which exposed a sequence of complete and continuous layer on the Henan-Anhui border of southern margin on the north China Block. There are conodonts molecules of the Middle-Late Ordovician in carbonatite of Baidashan group: Belodina compressa,Panderodus gracilis,Pseudobelodina dispansa(?) and Bryozo, Calthrop, Small shells, Archaeostraca etc., which filled the blank of the region that has been no fossil record. According to the characteristics of stratigraphic sequence, lithologic combination, the biota appearance, the ancient sedimentary environment of geography, and combined with a large number of limestone thin section results, it is concluded that the Baidashan group belongs to the Early Paleozoic era. The southern margin of North China massif line was redrawn to Jiangji-Longtan sets. We consider that the conodonts biota in this area should belong to the northern type conodonts geographical partition. © 2016, Editorial Office of Earth Science Frontiers. All right reserved.

Jiang S.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | Jiang S.,University of Chinese Academy of Sciences | Wang X.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | Cheng X.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | And 4 more authors.
Historical Biology | Year: 2015

Pterosaurs consist of an extinct group of flying reptiles that show short- and long-tailed species. Among those are the anurognathids whose phylogenetic position has been considered quite controversial. So far, there are about 10 described specimens from the Anurognathidae, from which only a few show the preservation of caudal elements. Here, we report a new anurognathid specimen (IVPP V16728) from Mutoudeng, Qinglong, Hebei, China that shows the most complete tail of this non-pterodactyloid clade. The preserved part of the tail has at least 20 caudal vertebrae, some showing extended chevrons and zygapophyses, which is a very primitive character within pterosaurs. © 2014,Taylor & Francis.

Discover hidden collaborations