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Acer hillsi
Taxonomy
Acer hillsi was named by Wolfe and Tanai (1987). Its type specimen is UWBM 56260 A&B, a seed/fruit (Samara), and it is a compression fossil. Its type locality is Republic, UWBM locality A0307, which is in a Ypresian lacustrine - large mudstone in the Klondike Mountain Formation of Washington.
Sister species lacking formal opinion data
A. amoenum, A. angustilobum, A. articum, A. ashwillii, A. berganum, A. campestrianum, A. chaneyii, A. chiharae, A. columbianum, A. crataegifolium, A. crenatifolium, A. cyaneyii, A. cyclospermum, A. dasycarpoides, A. florinii, A. fragile, A. gerberi, A. haselbachense, A. hercynicum, A. huziokae, A. hyrcanum, A. idahoensis, A. integerrimum, A. integrilobum, A. juani, A. kluckingii, A. lesquereuxi, A. limburgensis, A. magnini, A. menzelii, A. middlegatensis, A. miocaudatum, A. miodavidii, A. miohenryi, A. nevadensis, A. nordenskioeldii, A. opalus, A. osmontii, A. palaeodiabolicum, A. palaeosaccharinum, A. palmatum, A. pliocenicum, A. polymorphoides, A. praecreticum, A. protojaponicum, A. protomatsumurae, A. prototrifidium, A. pseudocarpinifolium, A. pseudocreaticum, A. rotundatum, A. rueminianum, A. rufinerve, A. salmonensis, A. section Plantanoidea, A. sepultum, A. silberlingii, A. sp, A. striatum, A. subcampestre, A. subginnala, A. subnikoense, A. trainii, A. tricuspidatum, A. trifoliatum, A. tyrrelli, A. tyrrellii
Entered
by B. Allen on 2022-02-25; modified by K. Volkman on 2023-01-09
Synonymy list
| Year | Name and author |
|---|---|
| 1987 | Acer hillsi 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 hillsi 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 asymmetrically inflated, outline semicircular, 0.5 cm long, 0.5 cm wide; attachment angle 40°, nutlet angle 20°. Wing entirely apical of nutlet, with a pronounce V-shaped sulcus; > 2.0 cm long, 1.0 cm wide; distal margin straight basally, expanding and broadly convex apically; 5 veins coalesced along proximal margin; wing veins diverging at angles of 10° to 20°, extending almost straight, bifurcating 2 to 4 times, few anstomoses of veinlets. |