Abstract Detail

Paleobotany

Liu, Xiaoyan [1], Quan, Cheng [2], Jin, Jianhua [3].

Late Oligocene fruiting catkins of Alnus from Guangxi, South China: The lowest latitudinal distributed fossil record.

Alnus Miller with ca. 29–35 extant species of deciduous trees or shrubs, is widely distributed today in temperate regions of the Northern Hemisphere and extending into tropical regions of South America and South and Southeast Asia. In China, there are 10 extant species, of which 5 are endemic and they are mainly distributed in the Northeast, Southwest and Southeast China. Alnus fossils are best known from the Cenozoic of the Northern Hemisphere based on leaves, fruiting and pollen catkins, and dispersed pollen, but have not been documented from the low latitude areas before. Here we described new infructescences materials of Alnus from the late Oligocene of the Nanning Basin, Guangxi, South China. The infructescences are woody, ovoid, ellipsoid to elongate ellipsoid in lateral outline, 10.4–24.1 (mean=16.7) mm long, 7.8–14.1 (mean=11.4) mm wide, with two infructescences clustered together on the branch. This is the first reliable report for the genus occurred in low latitude subtropical regions of South China, providing significant paleogeographic implications for the genus.

1 - 1Sun Yat-sen University, Guangzhou 510275, China., 2South China Normal University, Guangzhou, 510631,
2 - Chang'an University,126, Yanta Road, 710061, Xi'an, China
3 - Sun Yat-sen University, School Of Life Sciences, 135 Xingangxi Road, Guangzhou, Guangdong, 510275, China

Keywords:
Late Oligocene
fruiting catkins
Alnus
South China
 paleogeography.

Presentation Type: Oral Paper
Session: PAL4, Paleobotany II: Cenozoic Paleobotany
Location: Virtual/Virtual
Date: Tuesday, July 28th, 2020
Time: 1:30 PM
Number: PAL4005
Abstract ID:801
Candidate for Awards:None