Allenbya collinsonae Cev.-Ferriz et Stockey

Plant Fossil Names Registry Number: PFN001898

Act LSID: urn:lsid:plantfossilnames.org:act:1898

Authors: S. R. S. Cevallos-Ferriz & R. A. Stockey

Rank: species

Genus: Allenbya Cev.-Ferriz et Stockey

Reference: Cevallos-Ferriz, S. R. S. & Stockey, R. A. (1989): Permineralized fruits and seeds from the Princeton Chert (Middle Eocene) of British Columbia: Nymphaeaceae. – Botanical Gazette 150(2): 207–217., link

Page of description: 208

Illustrations or figures: figs 1–16

Name is type for

Types

Original diagnosis/description

Follicle-like fruit; carpel with at least four ovules; exocarp single layered, cells rectangular; mesocarp ca. eight cells thick, cells rectangular; endocarp single layered, cells rectangular. Seeds ovoid, anatropous, operculate, 6.0–7.0 mm × 3.0–3.5 mm; with two integuments. Outer integument a palisade of thick-walled cells, sinuous in longitudinal section and surface view, with four to 10 undulations per cell in surface view; underlain by one to two thin-walled rectangular cells. Inner integument of one to two rectangular thin-walled cells attached to the outer integument only at chalaza. Operculum (cap) composed of radially elongate, thin-walled cells; hilum adjacent to micropyle at apex of operculum. Vascular tissue beneath palisade of outer integument extends from hilum to chalaza forming an external raphal ridge. Perisperm present.

Etymology

The specific epithet honors Margaret E. Collinson in recognition of her work on Cenozoic seeds, in particular, her extensive review of seeds of the Nymphaeales.

Stratigraphy

Paleogene, Eocene
Middle Eocene
Allenby Formation of the Princeton Group

Locality

Canada
British Columbia
Specimens come from the east side of the Similkameen River, 8 km south of the town of Princeton, from a section on the river consisting of an interbedded sequence of chert and coal with an occasional thin ash bed replacing a chert layer.
The locality has been referred to as locality “I” (Boneham 1968) and the Princeton chert (Basinger 1976b; Stockey 1984, 1987).