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Acer toradense
Taxonomy
Acer toradense was named by Wolfe and Tanai (1987). Its type specimen is USNM 396010 A&B, a seed/fruit, and it is a compression fossil. Its type locality is Republic Locality 11018, which is in a Lutetian/Bartonian lacustrine /conglomerate 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 2023-01-08
Synonymy list
| Year | Name and author |
|---|---|
| 1987 | Acer toradense 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 toradense Wolfe and Tanai 1987
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. A. Wolfe and T. Tanai 1987 | Fruits samaroid; nutlet at basal end, 0.6 to 1.0 m wide, 0.7 to 1.3 cm long, apical wing at least 1.4 cm wide, 2.0 cm long; nutlet slightly inflated, outline broadly oval, slightly expanded along proximal margin; attachment angle 45 °; attachment scar 0.4 to 0.8 cm long, with a prominent basal keel; nutlet angle about 20°; surface of nutlet with a narrow ridge extending from center of attachment, curving distally about 2/3 length of nutlet, 3 narrow ridges extending proximally from the central ridge at irregular intervals; wing with a broadly convex distal margin and the proximal margin straight for 2/3 the length and then curving convexly to form a rounded apical margin; veins coalesced along proximal margin 7 to 8, wing veins diverging at angles of 20° to 30°, bifurcating 2 or 3 times, no anastamoses. |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Lutetian - Bartonian | USA (Washington) | Acer toradense (type locality: 11538) |