Further study of Late Devonian seed plant Cosmosperma polyloba: its reconstruction and evolutionary significance.

ABSTRACT:

Background

The earliest seed plants in the Late Devonian (Famennian) are abundant and well known. However, most of them lack information regarding the frond system and reconstruction. Cosmosperma polyloba represents the first Devonian ovule in China and East Asia, and its cupules, isolated synangiate pollen organs and pinnules have been studied in the preceding years.

Results

New fossils of Cosmosperma were obtained from the type locality, i.e. the Leigutai Member of the Wutong Formation in Fanwan Village, Changxing County, Zhejiang Province, South China. The collection illustrates stems and fronds extensively covered in prickles, as well as fertile portions including uniovulate cupules and anisotomous branches bearing synangiate pollen organs. The stems are unbranched and b

SUBMITTER: Liu L 

PROVIDER: S-EPMC5485708 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature