The earliest fossil evidence of the Hamamelidaceae: Late Cretaceous (Turonian) inflorescences and fruits of Altingioideae
Zhou, ZK; Crepet, WL; Nixon, KC
2001-05-01
Source PublicationAMERICAN JOURNAL OF BOTANY
ISSN0002-9122
Volume88Issue:5Pages:753-766
AbstractFossilized pistillate inflorescences, fruits, and pollen grains from the Turonian (similar to 90 million years before present) of New Jersey are described as a new genus, Microaltingia, in the family Hamamelidaceae. The fossils are remarkably preserved in exceptional detail. Several morphological and anatomical characters suggest affinities with Hamamelidaceae. These include capitate inflorescences, florets with a hypanthium, two-carpellate gynoecia, perigynous flowers, tricolpate reticulate pollen, a three-layered carpel wall, scalariform perforation plates with oblique end walls, and scalariform and opposite/alternate intervascular pitting. The gross morphology of pistillate inflorescences, unisexual flowers, phyllome structure, numerous ovules per carpel, and mode of carpel dehiscence indicate affinities with subfamily Altingioideae, which includes the modern genera Liquidambar and Altingia. Cladistic analysis using a previously published morphological matrix and scoring the fossil for available characters supports the position of the fossil as a sister taxon of modern Altingioideae. Although the fossil exhibits a mosaic of characters found within modem Hamamelidaceae, it is not identical to any modern taxon. Based on cladistic analysis, the fossil appears to be a basal "altingioid" that lacks the derived pollen found in extant Altingioideae and retains the more plesiomorphic tricolpate pollen found in the rest of Hamamelidaceae. The floral characters of the fossils, including phyllomes with stomata, short and straight styles, and small perprolate pollen grains, also indicate the possibility of insect pollination.
KeywordAltingioideae Cretaceous Hamamelidaceae Mosaic Turonian
Subject AreaPlant Sciences
Indexed BySCI
Language英语
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000168768900002
Citation statistics
Cited Times:55[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/3247
Collection中国科学院东亚植物多样性与生物地理学重点实验室
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Peoples R China
2.Cornell Univ, LH Bailey Hortorium, Ithaca, NY 14853 USA
Recommended Citation
GB/T 7714
Zhou, ZK,Crepet, WL,Nixon, KC. The earliest fossil evidence of the Hamamelidaceae: Late Cretaceous (Turonian) inflorescences and fruits of Altingioideae[J]. AMERICAN JOURNAL OF BOTANY,2001,88(5):753-766.
APA Zhou, ZK,Crepet, WL,&Nixon, KC.(2001).The earliest fossil evidence of the Hamamelidaceae: Late Cretaceous (Turonian) inflorescences and fruits of Altingioideae.AMERICAN JOURNAL OF BOTANY,88(5),753-766.
MLA Zhou, ZK,et al."The earliest fossil evidence of the Hamamelidaceae: Late Cretaceous (Turonian) inflorescences and fruits of Altingioideae".AMERICAN JOURNAL OF BOTANY 88.5(2001):753-766.
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