Quadrasubulaflora kishenehnensis MacK.A.Sm., Greenwalt et Manchester

Plant Fossil Names Registry Number: PFN003033

Act LSID: urn:lsid:plantfossilnames.org:act:3033

Authors: M. K. A. Smith, D. Greenwalt & S. R. Manchester

Rank: species

Genus: Quadrasubulaflora MacK.A.Sm., Greenwalt et Manchester

Reference: Smith, M. K. A., Greenwalt, D. & Manchester, S. R. (2023): Diverse fruits and seeds of the mid-Eocene Kishenehn Formation, northwestern Montana, USA, and their implications for biogeography. – Fossil Imprint 79(1): 37–88.

Page of description: 65

Illustrations or figures: text-fig. 12b–e

Name is type for

Quadrasubulaflora MacK.A.Sm., Greenwalt et Manchester 2023


Original diagnosis/description

Flower square in cross section, elliptical in longitudinal section; pedicel slightly curved; awl-shaped and apices point outward with concave calyx lamina curving up to connect corners; hair-like projections protruding from near the axis.


The specific epithet is for the for the Kishenehn Formation.


Paleogene, Eocene, Lutetian
Kishenehn Formation, ca. 44 Ma


United States
Spring Site

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


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