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Acer princetonense
Taxonomy
Acer princetonense was named by Wolfe and Tanai (1987). Its type specimen is UAPC S5543, a seed/fruit, and it is a compression fossil. Its type locality is One Mile Creek, north of Princeton, which is in a Ypresian lacustrine horizon in the Allenby Formation of Canada.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1987 | Acer princetonense Wolfe and Tanai |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Acer princetonense Wolfe and Tanai 1987
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. A. Wolfe and T. Tanai 1987 | Fruit samaroid; nutlet at basal end; nutlet 1.2 cm long, 0.8 cm wide, elliptic, markedly inflated; nutlet with 2 flanges placed in distal 1/3 of the nutlet and curving approximately parallel to the distal margin of nutlet; attachment angle 30°, nutlet angle 20°; veins on nutlet obscure; proximal margin of nutlet markedly convex. Wing 3.0 to 4.0 cm long, 1.1 to 1.4 cm wide; proximal margin straight, distal margin broadly convex, forming a shallow notch with nutlet; proximal margin with 9 prominent veins that appear to originate equally spaced along apicl margin of nutlet; wing veins diverging from proximal margin at angles of 30° to 50°, dichotomizing > 4 times, numerous anastomoses, veinlets reticulate. |