Asclepiadospermum ellipticum C.Del Rio, Su et Z.K.Zhou in Del Rio, Wang, Liu, Liang, Spicer, Wu, Zhou & Su

Plant Fossil Names Registry Number: PFN000894

Act LSID: urn:lsid:plantfossilnames.org:act:894

Authors: C. Del Rio, T. Su & Z. K. Zhou

Rank: species

Genus: Asclepiadospermum C.Del Rio, Su et Z.K.Zhou in Del Rio, Wang, Liu, Liang, Spicer, Wu, Zhou & Su

Reference: Del Rio, C., Wang, T. X., Liu, J., Liang, S. Q., Spicer, R. A., Wu, F. X., Zhou, Z. K. & Su, T. (2020): Asclepiadospermum gen. nov., the earliest fossil record of Asclepiadoideae (Apocynaceae) from the early Eocene of central Qinghai-Tibetan Plateau, and its biogeographic implications. – American Journal of Botany 107(1): 126–138.

Page of description: 129, 132

Illustrations or figures: Fig. 3

Types

Original diagnosis/description

Seed elliptical, tapering rapidly toward a blunt to slightly round and asymmetrical apex and rounded at the base; central part elliptical and irregularly spotted, surrounded by a thin margin with a straight median line corresponding to the trace left by the raphe from the apex to the center of the seed. Cells small (~30 μm wide), polygonal, and irregularly arranged.

Etymology

The specific epithet ellipticum refers to the elliptical shape of the seed.

Stratigraphy

Paleogene, Eocene
The Lower Eocene Niubao Formation

Locality

China
Jianglang village, Bangor County, Central Qinghai-Tibetan plateau