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Whole-Plant Reconstruction and Updated Phylogeny of Austrohamia acanthobractea (Cupressaceae) from the Middle Jurassic of Northeast China
Dong, Chong (董重)1,2; Wang, Yong-Dong (王永栋)1,2; Yang, Xiao-Ju (杨小菊)2,3; Sun, Bai-Nian4,5
2018-10-01
Source PublicationINTERNATIONAL JOURNAL OF PLANT SCIENCES
ISSN1058-5893
Volume179Issue:8Pages:640-662
Abstract

Premise of research.Discovery of abundant leafy twigs with attached pollen cones and seed cones of Austrohamia acanthobractea from the Middle Jurassic Daohugou Lagerstatte in Inner Mongolia, Northeast China, provides detailed morphological and anatomical features of the species, permitting a whole-plant reconstruction and a more detailed evaluation of the affinities of this extinct plant within the Cupressaceae.Methodology.All fossil plants were studied with standard paleobotanical preparations and descriptive terminology.Pivotal results.Austrohamia acanthobractea has leafy twigs consisting of helically arranged, linear leaves with two narrow stomatal bands on the abaxial surface. Pollen cones are borne in the axil of a lanceolate bract, subterminally on shoots in clusters of four, with peltate microsporophylls. Seed cones are borne terminally or laterally, solitary or in a pair, with numerous spirally arranged bract-scale complexes. The bract-scale complex apparently lacks a free ovuliferous scale. Seeds are obovate and inverted, with two narrow lateral wings. Austrohamia acanthobractea bears a close resemblance to extant Taiwania and Cunninghamia.Conclusions.The morphological cladistic analysis suggests that the two species of Austrohamia form a polytomy with the expanded Cunninghamioideae clade, which includes extant Cunninghamia and Cunninghamia-like fossils from the Jurassic, Cretaceous, and Cenozoic. It supports the original interpretation that the genus is closely related to Cunninghamia and Cunninghamia-like fossils based on material from the Early Jurassic of Patagonia in Argentina.

KeywordConifers Middle Jurassic Fossils Cunninghamia Taiwania Daohugou Lagerstatte
DOI10.1086/699665
Language英语
WOS KeywordSp-nov ; Inner-mongolia ; Sensu-lato ; Cretaceous Diversification ; Taiwania Cupressaceae ; Ovule Development ; Fossil Conifer ; Seed Cones ; Evolution ; Cunninghamia
Funding ProjectStrategic Priority Research Program (B) of the CAS[XDB18000000] ; National Natural Science Foundation of China[41790454] ; National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41472011] ; Basic Project of the State Key Laboratory of Palaeobiology and Stratigraphy[20162104] ; Key Laboratory of Economic Stratigraphy and Palaeogeography, CAS (Nanjing Institute of Geology and Palaeontology)[2016KF09]
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000445805000005
Funding OrganizationStrategic Priority Research Program (B) of the CAS ; National Natural Science Foundation of China ; Basic Project of the State Key Laboratory of Palaeobiology and Stratigraphy ; Key Laboratory of Economic Stratigraphy and Palaeogeography, CAS (Nanjing Institute of Geology and Palaeontology)
PublisherUNIV CHICAGO PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/16897
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorDong, Chong (董重)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Palaeoenvironm, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Key Lab Econ Stratig & Palaeogeog, Nanjing 210008, Jiangsu, Peoples R China
4.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Gansu, Peoples R China
5.Lanzhou Univ, Key Lab Mineral Resources Western China Gansu Pro, Lanzhou 730000, Gansu, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Dong, Chong ,Wang, Yong-Dong ,Yang, Xiao-Ju ,et al. Whole-Plant Reconstruction and Updated Phylogeny of Austrohamia acanthobractea (Cupressaceae) from the Middle Jurassic of Northeast China[J]. INTERNATIONAL JOURNAL OF PLANT SCIENCES,2018,179(8):640-662.
APA Dong, Chong ,Wang, Yong-Dong ,Yang, Xiao-Ju ,&Sun, Bai-Nian.(2018).Whole-Plant Reconstruction and Updated Phylogeny of Austrohamia acanthobractea (Cupressaceae) from the Middle Jurassic of Northeast China.INTERNATIONAL JOURNAL OF PLANT SCIENCES,179(8),640-662.
MLA Dong, Chong ,et al."Whole-Plant Reconstruction and Updated Phylogeny of Austrohamia acanthobractea (Cupressaceae) from the Middle Jurassic of Northeast China".INTERNATIONAL JOURNAL OF PLANT SCIENCES 179.8(2018):640-662.
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