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14 results on '"Ablaev, Albert G."'

12. EQUISETUM CF. PRATENSE (EQUISETACEAE) FROM THE MIOCENE OF YUNNAN IN SOUTHWESTERN CHINA AND ITS PALEOECOLOGICAL IMPLICATIONS.

Author

Yu-Ling Zhang, Ferguson, David K., Ablaev, Albert G., Yu-Fei Wang, Cheng-Sen Li, and Lei Xie

Subjects
EQUISETUM, MIOCENE stratigraphic geology, PHENOLOGY, LIQUIDAMBAR, ALDER, HUMIDITY
Abstract

Rhizomes with tubers of Equisetum cf. pratense Ehrhart are described for the first time from the late Miocene of Lühe, Yunnan Province, southwestern China. The rhizomes consist of distinct nodes and internodes. The nodes bear one to four bunches of tubers (two to four tubers per bunch). The tubers are elliptical, rounded, ovate, or spindle shaped, and the most distal is mucronate. The occurrence of E. cf. pratense would indicate a wet habitat, and the presence of rhizomes with tubers implies that burial occurred during the late fall or winter, assuming that the fossil and its nearest living relative have similar climatic tolerances and phenology. These finds, combined with the presence of thermophilous genera Cyclobalanopsis, Castanopsis, and Liquidambar and hygrophilous elements Alnus and Taxodioxylon, indicate a warm and humid subtropical climate at Lühe in the Miocene. [ABSTRACT FROM AUTHOR]

Published
2007
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13. First record of Cercidiphylloxylon(Cercidiphyllaceae) from the Palaeocene of Fushun, NE China

Author

GUO, Wen-Yi, YANG, Jian, GROMYKO, Dmitry, ABLAEV, Albert G., WANG, Qing, and LI, Cheng-Sen

Abstract

Abstract Cercidiphylloxylon spenceri(Brett) Pearson is described from the Lizigou Formation, Palaeocene in China. The growth rings are distinct; pores are diffuse, solitary, with somewhat angular outlines in cross section; vessel elements long with long scalariform perforation plates; intervessel pitting is opposite to scalariform; fiber-tracheids are present; axial parenchyma is scarce; rays are mostly biseriate and heterogeneous. All wood characters of the fossil specimen fall into the range of those of extant Cercidiphyllum(Cercidiphyllaceae). The finding is one of the earliest fossil wood records of Cercidiphyllaceae.

Published
2010
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