| Clarno Fm., Oregon, western U.S.A.; ∼48 Ma |
Manchester, 1994 |
“Quercus” paleocarpa Manchester; cupules and acorns |
Group Cyclobalanopsis (? Lithocarpus) |
| Axel-Heiberg Island, Canadian Arctic; ∼45 Ma |
McIntyre, 1991; McIver & Basinger, 1999
|
Pollen and leaves |
New World Clade; Quercus Group Quercus/Lobatae |
| Hareøn, western Greenland; ∼42 Ma |
Grímsson et al., 2015 |
Quercus sp. 4–5; pollen |
Extinct/ancestral type |
|
|
Quercus sp. 6–7; pollen |
New World Clade (aff. Group Protobalanus) |
|
|
Quercus sp. 1–3; pollen |
Quercus Group Quercus and/or Lobatae |
| Baltic amber, northern Europe; ∼45 Ma |
Crepet & Nixon, 1989; Weitschat & Wichard, 2003
|
Flower and in situ pollen |
Quercus Group Quercus |
| Königsaue, near Aschersleben, Germany; middle Eocene (48–38 Ma) |
Kvaček & Walther, 1989 |
Quercus subhercynica H Walther & Kvaček; leaf |
Quercus Group Lobatae |
| Ube coal-field, southwestern Honshu, Japan; middle Eocene (48–38 Ma) |
Huzioka & Takahasi, 1970 |
Cyclobalanopsis nathoi Huzioka & Takahashi; leaf, acorn (?), cupule (?) |
Quercus, affinity unclear |
| Changchang, Hainan; middle (?) Eocene (50–35 Ma) |
Hofmann, 2010 |
Quercus pollen types 2–8, 10; pollen |
Quercus, affinity unclear (extinct, Group Quercus/Lobatae?, Group Protobalanus?) |
|
|
Quercus pollen type 1; pollen |
Quercus Group Ilex |
|
|
Quercus pollen type 9; pollen |
Quercus Group Cyclobalanopsis |
