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A more southerly occurrence of Xenoxylon in North America: X. utahense Xie et Gee sp. nov. from the Upper Jurassic Morrison Formation in Utah, USA, and its paleobiogeographic and paleoclimatic significance
Xie, Aowei1; Gee, Carole T.1,2,3; Bennis, Mary Beth4; Gray, Dale4; Sprinkel, Douglas A.5
2021-08-01
Source PublicationREVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN0034-6667
Volume291Pages:13
Abstract

Although Xenoxylon is a global genus of Mesozoic wood in the Northern Hemisphere, it is striking that the valid records in North America occur only in the northernmost parts of the continent. Decades ago, two species of Xenoxylon were described from the Upper Jurassic Morrison Formation in Utah, USA. However, a recent review of all North American reports of Xenoxylon excluded both species from the genus based on their anatomy, rendering all records of this genus south of Montana invalid in 2019. Here we describe a fossil log from the Morrison Formation near Vernal, northeastern Utah, USA, with true Xenoxylon anatomy with locally xenoxylean radial tracheid pitting and fenestriform crossfield pitting. Due to a novel combination of radial tracheid pitting, crossfield pitting and ray height, a newspecies, Xenoxylon utahense Xie et Gee sp. nov., is recognized here. Located at the southernmost occurrence of Xenoxylon in North America during the Mesozoic, this new species confirms that Xenoxylon trees were not only restricted to a circumpolar zone, but also grew in more southerly areas. In comparison with other fossil plants in the Morrison Formation of Utah, along with growth ring characteristics and climatic preferences of living conifers, the new fossil log with true growth rings with abundant, well-formed earlywood and extremely little latewood argues for a warm and humid climate with very mild seasonality for the Late Jurassic in this region, which is inconsistent with previous interpretations of Xenoxylon as a reliable indicator of cool climates. (C) 2021 Elsevier B.V. All rights reserved.

KeywordGrowth ring analysis Mean sensitivity Miroviaceae Salt Wash Member Xenoxylean
DOI10.1016/j.revpalbo.2021.104451
Indexed BySCI
Language英语
WOS KeywordWOOD GENUS XENOXYLON ; GROWTH-RINGS ; ALEXANDER ISLAND ; 1ST OCCURRENCE ; CLIMATE ; TERRESTRIAL ; FOREST ; RECONSTRUCTION ; PALEOECOLOGY ; SLOPE
Funding ProjectChina Scholarship Council[201804910527] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) State Grant[193101]
WOS Research AreaPlant Sciences ; Paleontology
WOS SubjectPlant Sciences ; Paleontology
WOS IDWOS:000661875200004
Funding OrganizationChina Scholarship Council ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) State Grant
PublisherELSEVIER
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/38358
Collection中国科学院南京地质古生物研究所
Corresponding AuthorXie, Aowei
Affiliation1.Univ Bonn, Inst Geosci, Div Paleontol, Nussallee 8, D-53115 Bonn, Germany
2.Huntington Bot Gardens, 1151 Oxford Rd, San Marino, CA 91108 USA
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
4.Utah Field House Nat Hist Stale Pk Museum, 496 E Main, Vernal, UT 84078 USA
5.Azteca Geosolut, 3260 N 1350 W, Pleasant View, UT 84414 USA
Recommended Citation
GB/T 7714
Xie, Aowei,Gee, Carole T.,Bennis, Mary Beth,et al. A more southerly occurrence of Xenoxylon in North America: X. utahense Xie et Gee sp. nov. from the Upper Jurassic Morrison Formation in Utah, USA, and its paleobiogeographic and paleoclimatic significance[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2021,291:13.
APA Xie, Aowei,Gee, Carole T.,Bennis, Mary Beth,Gray, Dale,&Sprinkel, Douglas A..(2021).A more southerly occurrence of Xenoxylon in North America: X. utahense Xie et Gee sp. nov. from the Upper Jurassic Morrison Formation in Utah, USA, and its paleobiogeographic and paleoclimatic significance.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,291,13.
MLA Xie, Aowei,et al."A more southerly occurrence of Xenoxylon in North America: X. utahense Xie et Gee sp. nov. from the Upper Jurassic Morrison Formation in Utah, USA, and its paleobiogeographic and paleoclimatic significance".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 291(2021):13.
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