Spirodela scutata (Dawson) E.W.Berry

Plant Fossil Names Registry Number: PFN001910

Act LSID: urn:lsid:plantfossilnames.org:act:1910

Author: E. W. Berry

Rank: species

Basionym: Lemna (Spirodela) scutata Dawson

Reference: Berry, E. W. (1935): A preliminary contribution to the floras of the Whitemud and Ravenscrag formations. – Memoir, Geological Survey, Canada 182: 1–107., link

Page of description: 23

Previously published illustration or figures: Dawson, J. W. (1875): Notes on the plants, collected by Mr. G. M. Dawson, from the Lignite Tertiary Deposits, near the Forty-ninth Parallel. in Dawson, G. M. (ed.): Report on the geology and resources of the region in the vicinity of the Forty-ninth Parallel, from the Lake of the Woods to the Rocky Mountains. Dawsons Brothers, Montreal: pp. 327–331.

Other combinations

Types

Original diagnosis/description

Fronds round kidney-form, entire or slightly undulate at the edges, sometimes an inch in diameter, single or grouped. Roots numerous, filiform, proceeding from a round spot near the notch of the frond.

Stratigraphy

Paleogene, Paleocene
Ravenscrag Formation

Berry (1935: Mem. Geol. Surv. Canada, 182: 23) stated that "...and I suspect came from the Paskapoo formation". But Bell (1949: Bull. Geol. Surv. Canada, 13: 82) specified the stratum typicum for the specimen, which was later designated as lectotype, as "Ravenscrag formation".

Locality

Canada
Badlands south of Wood Mountain, Saskatchewan

Berry (1935: Mem. Geol. Surv. Canada, 182: 23) stated that "This species was described from the "Badlands south of Woody Mountain, Alberta,'' and...". But Bell (1949: Bull. Geol. Surv. Canada, 13: 82) specified for the specimen, which was later designated as lectotype, locality as "Saskatchewan, locality 4095".