Rightcania E.M.Friis, P.R.Crane et K.R.Pedersen

Plant Fossil Names Registry Number: PFN000104

Act LSID: urn:lsid:plantfossilnames.org:act:104

Authors: E. M. Friis, P. R. Crane & K. R. Pedersen

Rank: genus

Reference: Friis, E. M., Crane, P. R. & Pedersen, K. R. (2018): Rightcania and Kvacekispermum: Early Cretaceous seeds from eastern North America and Portugal provide further evidence of the early chloranthoid diversification. – Fossil Imprint 74(1–2): 65–76.

Page of description: 68

Type

Original diagnosis/description

Fruit a berry with three to five ovules/seeds and a fruit wall of thin-walled parenchyma cells. Stigmatic area sessile, indistinct. Hypanthium fused to lower part of ovary wall. Ovules pendent, orthotropous to semi-orthotropous, bitegmic, endotestal with a testa of multiple cell layers. Exotesta of several layers of slightly elongate, irregular wavy cells; endotesta a single layer of cubic to palisade-shaped cells containing densely spaced crystals and fibrous infillings. Outer surface of endotesta smooth. Tegmen several cell layers thick; exotegmen of elongated fibrous cells, mesotegmen and endotegmen with large, slightly elongate and thin-walled cells; inner layers of tegmen crushed in mature seeds. Embryo tiny; nutritive tissue of isodiametric thin-walled cells.

Etymology

Rightcania is an anagram of Canrightia to indicate similarity to this fossil genus.