气候变化领域集成服务门户(CCPortal): Middle Triassic Pentasauropus-dominated ichnofauna from western Gondwana: Ichnotaxonomy; palaeoenvironment; biostratigraphy and palaeobiogeography

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DOI	10.1016/j.palaeo.2019.03.020
	Middle Triassic Pentasauropus-dominated ichnofauna from western Gondwana: Ichnotaxonomy; palaeoenvironment; biostratigraphy and palaeobiogeography
	Lagnaoui A.; Melchor R.N.; Bellosi E.S.; Villegas P.M.; Espinoza N.; Umazano A.M.
发表日期	2019
ISSN	0031-0182
起始页码	41
结束页码	61
卷号	524
英文摘要	Quadruped trackways of large pentadactyl footprints are reported from the Middle Triassic (Anisian-Ladinian) Cerro de las Cabras Formation of the Cuyo Basin, Mendoza Province, central-western Argentina. The track-bearing strata are interpreted as deposited by sheetfloods in a mixed flat where water was ponded in a playa-lake setting. The vertebrate trackways are assigned to the ichnogenus Pentasauropus, originally described from the Upper Triassic Elliot Formation of South Africa, based on the presence of five equally spaced digit imprints that form an anteriorly convex broad arcuate pattern. A new ichnospecies, Pentasauropus argentinae nov. isp., is erected for the Argentinian material because of the distinct heteropody, inward rotation of the pes and outward rotation of the manus imprints, and the presence of palm/sole traces, and the diagnosis of the ichnogenus is emended. Pes/manus set arrangement and trackway patterns indicate a sprawling limbed trackmaker with an abducted posture for the fore-limbs and at least a semi-abducted posture for the hindlimbs, which suggests that the trackmaker was a kannemeyeriiform dicynodont. Associated archosaur ichnotaxa (Chirotherium barthii, Chirotherium cf. C. rex, Isochirotherium cf. I. coureli) point to a Middle Triassic age for the trackway-bearing strata in agreement with bracketing geochronological data. The rare occurrence of the therapsid footprint Dicynodontipus isp. is also compatible with the inferred age. The moderate abundance and oldest occurrence of Pentasauropus from three areas in Argentina suggest an origin for this ichnogenus in southwestern Gondwana, and presumably this area was a faunal exchange gate between southeastern and southwestern Gondwana and south Gondwana and North America. © 2019 Elsevier B.V.
英文关键词	Anisian-Ladinian; Argentina; Behaviour; Chirotherian track; Dicynodont trackmaker; Pentasauropus argentinae nov. isp.
语种	英语
scopus关键词	abundance; Anisian; biostratigraphy; geochronology; Gondwana; ichnology; Ladinian; morphology; paleobiogeography; paleoenvironment; taxonomy; trace fossil; trackway; Triassic; vertebrate; Argentina; Cuyo Basin; Mendoza; North America; South Africa; Chirotherium; Therapsida; Vertebrata
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150982
作者单位	Instituto de Ciencias de la Tierra y Ambientales de La Pampa (CONICET and Universidad Nacional de La Pampa), Mendoza 109, Santa Rosa, La Pampa 6300, Argentina; Departamento de Geología, Universidad Nacional de La Pampa, Av. Uruguay 151, Santa Rosa, La Pampa 6300, Argentina; CONICET, Museo Argentino de Ciencias Naturales, Av. Ángel Gallardo 470, C1405DJR, Buenos Aires, Argentina; Laboratory of Stratigraphy of Oil-and-Gas Bearing Reservoirs, Institute of Geology and Petroleum Technologies, Kazan (Volga Region) Federal University, Kazan, Russian Federation
推荐引用方式 GB/T 7714	Lagnaoui A.,Melchor R.N.,Bellosi E.S.,et al. Middle Triassic Pentasauropus-dominated ichnofauna from western Gondwana: Ichnotaxonomy; palaeoenvironment; biostratigraphy and palaeobiogeography[J],2019,524.
APA	Lagnaoui A.,Melchor R.N.,Bellosi E.S.,Villegas P.M.,Espinoza N.,&Umazano A.M..(2019).Middle Triassic Pentasauropus-dominated ichnofauna from western Gondwana: Ichnotaxonomy; palaeoenvironment; biostratigraphy and palaeobiogeography.Palaeogeography, Palaeoclimatology, Palaeoecology,524.
MLA	Lagnaoui A.,et al."Middle Triassic Pentasauropus-dominated ichnofauna from western Gondwana: Ichnotaxonomy; palaeoenvironment; biostratigraphy and palaeobiogeography".Palaeogeography, Palaeoclimatology, Palaeoecology 524(2019).