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are simple in structure and a generally oval shape. The deeply five lobed structure and tertiary vein structure is very similar to the modern species
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464:. However the secondary veins are a combination of alternating craspedodromous veins and forking veins. The related living Sapindaceae genera
639:
369:
634:
301:
107:
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The species was described from a group of leaf specimens found in the West
Foreland Formation which is part of the
373:
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244:
216:
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102:
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377:
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Journal of the
Faculty of Science, Hokkaido University. Series 4, Geology and Mineralogy
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36:
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46:
434:
Chickaloon
Formation. In their type description Wolfe and Tanai designated
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is the second oldest occurrence of the maple genus, with the oldest being
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also have a similar alternating pattern of secondary veins.
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in recognition of the type locality on Cape
Douglas.
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Journal of the
Faculty of Science, Hokkaido University
563:
364:. The holotype and paratypes are preserved in the
522:(maples) in the Cenozoic of Western North America"
326:. Sediments of the formation span are typically
308:. It is the type species for the extinct section
391:United States Geological Survey, Denver office
518:"Systematics, Phylogeny, and Distribution of
438:as the type and only species for the extinct
8:
511:
509:
507:
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501:
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20:
397:. Wolfe and Tanai published their 1987
296:. The species is solely known from the
491:
360:, number "USNM 396006", and a group of
341:only found in the Eocene age section.
7:
370:National Museum of Natural History
14:
302:Katmai National Park and Preserve
106:
516:Wolfe, J.A.; Tanai, T. (1987).
650:Extinct flora of North America
382:The specimens were studied by
1:
640:Fossil taxa described in 1987
306:Kodiak Island Borough, Alaska
352:was described from several
666:
532:(1): 1β246. Archived from
368:collections housed at the
345:History and classification
250:
243:
103:Scientific classification
101:
23:
635:Plants described in 1987
16:Extinct species of maple
476:plus the extinct genus
393:and Toshimasa Tanai of
374:Smithsonian Institution
333:rocks dating from the
337:to early Eocene with
300:sediments exposed in
395:Hokkaido University
236:A. douglasense
266:& Tanai, 1987
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616:
602:Open Tree of Life
557:Taxon identifiers
271:
270:
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610:
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565:Acer douglasense
552:
545:
544:
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541:
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456:Acer douglasense
432:Latest Paleocene
399:type description
378:Washington, D.C.
350:Acer douglasense
275:Acer douglasense
259:
257:Acer douglasense
255:
221:
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111:
110:
96:
33:
29:Temporal range:
25:Acer douglasense
21:
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289:described from
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436:A. douglasense
422:A. douglasense
413:of the chosen
403:A. douglasense
384:paleobotanists
372:, part of the
366:paleobotanical
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339:A. douglasense
335:Late Paleocene
328:volcanoclastic
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285:in the family
278:is an extinct
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28:
15:
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9:
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4:
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651:
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645:Eocene plants
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536:on 2011-10-04
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467:Cardiospermum
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415:specific name
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408:
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387:Jack A. Wolfe
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318:Type locality
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245:Binomial name
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133:Tracheophytes
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43:
38:
26:
22:
19:
564:
538:. Retrieved
534:the original
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519:
477:
471:
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427:A. alaskense
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421:
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349:
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338:
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298:Early Eocene
274:
273:
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217:
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165:
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139:
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32:Early Eocene
24:
18:
461:A. spicatum
450:Description
418:douglasense
331:sedimentary
324:Kenai Group
287:Sapindaceae
192:Sapindaceae
146:Angiosperms
624:Categories
540:2011-08-09
486:References
454:Leaves of
182:Sapindales
430:from the
411:etymology
362:paratypes
354:specimens
229:Species:
210:Section:
116:Kingdom:
580:Q2822955
574:Wikidata
479:Bohlenia
473:Serjania
444:Douglasa
442:section
358:holotype
311:Douglasa
222:Douglasa
188:Family:
159:Eudicots
607:7642057
594:9139274
409:. The
405:in the
389:of the
283:species
254:†
233:†
198:Genus:
178:Order:
120:Plantae
356:, the
294:leaves
291:fossil
172:Rosids
630:Maple
280:maple
264:Wolfe
220:sect.
218:Acer
166:Clade
153:Clade
140:Clade
127:Clade
589:GBIF
520:Acer
470:and
440:Acer
401:for
203:Acer
37:Preκ
376:in
626::
604::
591::
576::
530:22
528:.
524:.
494:^
446:.
314:.
304:,
168::
155::
142::
129::
87:Pg
543:.
214:β
92:N
82:K
77:J
72:T
67:P
62:C
57:D
52:S
47:O
42:κ
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