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The Earliest Normal Flower from Liaoning Province, China
Alternative TitleThe Earliest Normal Flower from Liaoning Province, China
Wang Xin1; Zheng Shaolin3
2009
Source PublicationJOURNAL OF INTEGRATIVE PLANT BIOLOGY
ISSN1672-9072
Volume51Issue:8Pages:800-811
AbstractThe early evolution of angiosperms has been a focus of intensive research for more than a century. The Yixian Formation in western Liaoning yields one of the earliest angiosperm macrofloras. Despite multitudes of angiosperm fossils uncovered, including Archaefructus and Sinocarpus, no bona fide normal flower has been dated to 125 Ma (mega-annum) or older. Here we report Callianthus dilae gen. et sp. nov. from the Yixian Formation (Early Cretaceous) in western Liaoning, China as the earliest normal flower known to date. The flower demonstrates a typical floral organization, including tepals, androecium, and gynoecium. The tepals are spatulate with parallel veins. The stamens have a slender filament, a globular anther, bristles at the anther apex, and in situ round-triangular pollen grains. The gynoecium is composed of two stylate carpels enclosed in a fleshy envelope, and develops into a "hip" when mature. Since the well-accepted history of angiosperms is not much longer than 125 Ma, Callianthus together with Chaoyangia, Archaefructus and Sinocarpus from the Yixian Formation demonstrate a surprisingly high diversity of angiosperms, implying a history of angiosperms much longer than currently accepted.
Other AbstractThe early evolution of angiosperms has been a focus of intensive research for more than a century. The Yixian Formation in western Liaoning yields one of the earliest angiosperm macrofloras. Despite multitudes of angiosperm fossils uncovered, Including Archaefructus and Sinocarpus, no bona fide normal flower has been dated to 125 Ma (mega-annum) or older. Here we report Callianthus dilae gen. at sp. nov. from the Yixian Formation (Early Cretaceous) in western Liaoning, China as the earliest normal flower known to date. The flower demonstrates a typical floral organization, including tepals, androecium, and gynoecium. The tepals are spatulata with parallel veins. The stamens have a slender filament, a globular anther, bristles at the anther apex, and in situ round-triangular pollen grains. The gynoecium is composed of two stylate carpels enclosed in a fleshy envelope, and develops into a "hip" when mature. Since the well-accepted history of angiosperms is not much longer than 125 Me, Callianthus together with Chaoyangia, Archaefructus and Sinocarpus from the Yixian Formation demonstrate a surprisingly high diversity of angiosperms, implying a history of angiosperms much longer than currently accepted.
KeywordYIXIAN FORMATION NORTHEAST CHINA EPHEDRA EPHEDRACEAE JURASSIC ANGIOSPERM BASAL ANGIOSPERMS CONE MORPHOLOGY NE CHINA POLLEN FOSSIL EVOLUTION angiosperm bisexual Callianthus Early Cretaceous flower Liaoning perianth Yixian Formation
Indexed ByCSCD
Language英语
CSCD IDCSCD:3652478
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/155948
Collection中国科学院金属研究所
Affiliation1.武汉大学
2.中国科学院
3.中国科学院金属研究所
Recommended Citation
GB/T 7714
Wang Xin,Zheng Shaolin. The Earliest Normal Flower from Liaoning Province, China[J]. JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2009,51(8):800-811.
APA Wang Xin,&Zheng Shaolin.(2009).The Earliest Normal Flower from Liaoning Province, China.JOURNAL OF INTEGRATIVE PLANT BIOLOGY,51(8),800-811.
MLA Wang Xin,et al."The Earliest Normal Flower from Liaoning Province, China".JOURNAL OF INTEGRATIVE PLANT BIOLOGY 51.8(2009):800-811.
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