The ultrastructure of Cerebropollenites from the Jurassic and Cretaceous of Asia

doi:10.1080/00173130310009020

	The ultrastructure of Cerebropollenites from the Jurassic and Cretaceous of Asia
	Shang, Y ; Zavada, MS
	2003
发表期刊	GRANA
ISSN	0017-3134
卷号	42 期号:2 页码:102-107
摘要	The dispersed pollen taxon Cerebropollenites recovered from the Jurassic of Afghanistan and Cretaceous of China was investigated ultrastructurally. Cerebropollenites lacks the differentiation of the proximal and distal hemispheres, a faint proximal triradiate mark, and an equatorial fringe, all features found in extant Tsuga, however, the gross pollen morphology, and the wall ultrastructure of Cerebropollenites suggests an affinity with the extant genus Tsuga (Section Micropeuce). The differences observed between Cerebropollenites and Tsuga are no greater than the differences observed between the pollen of the two Sections of Tsuga, Hesperopeuce and Micropeuce. The occurrence of Cerebropollenites in the Jurassic and Cretaceous is, thus far, the only fossil evidence that the genus Tsuga may have been present in the Mesozoic, and suggests that the Pinaceae, which is unequivocally recognized in the Cretaceous, may have had an earlier origin.
DOI	10.1080/00173130310009020
语种	英语
关键词[WOS]	POLLEN MORPHOLOGY ; LACTORIDACEAE ; PHYLOGENY ; PINACEAE
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000184144800006
出版者	TAYLOR & FRANCIS AS
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/1199
专题	中国科学院南京地质古生物研究所
通讯作者	Shang, Y
作者单位	1.Acad Sinica, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China 2.Providence Coll, Dept Biol, Providence, RI 02918 USA
推荐引用方式 GB/T 7714	Shang, Y,Zavada, MS. The ultrastructure of Cerebropollenites from the Jurassic and Cretaceous of Asia[J]. GRANA,2003,42(2):102-107.
APA	Shang, Y,&Zavada, MS.(2003).The ultrastructure of Cerebropollenites from the Jurassic and Cretaceous of Asia.GRANA,42(2),102-107.
MLA	Shang, Y,et al."The ultrastructure of Cerebropollenites from the Jurassic and Cretaceous of Asia".GRANA 42.2(2003):102-107.