Siphonospermum Rydin et E.M.Friis

Plant Fossil Names Registry Number: PFN002774

Act LSID: urn:lsid:plantfossilnames.org:act:2774

Authors: C. Rydin & E. M. Friis

Rank: genus

Reference: Rydin, C. & Friis, E. M. (2010): A new Early Cretaceous relative of Gnetales: Siphonospermum simplex gen. et sp. nov. from the Yixian Formation of Northeast China. – BMC Evolutionary Biology 10: 183 (6 pp.).

Page of description: 5

Type

Original diagnosis/description

Erect stem with terminal units of reproductive structures. Leaves linear, opposite at node, with primary parallel venation. Reproductive units without supporting bracts and terminal on median and lateral branches, narrowly ovoid with rounded base, extended acuminate apex, each consisting of one ovule, orthotropous and unitegmic. Ovules surrounded by an inner sclerenchymatous and an outer parenchymatous layer. Integument extended apically into a long thread-like micropylar tube.

Etymology

From the long thread-like micropyle (siphon) and seed (spermum).