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Nothofagus serrata
Taxonomy
Nothofagus serrata was named by Hill (1991) [Specimens examined: LRR1-005,511,515]. It is not extant. It is considered to be a form taxon. Its type specimen is LRR1-511, a leaf. Its type locality is Little Rapid River 1, which is in an Oligocene fluvial-lacustrine mudstone in Australia.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1991 | Nothofagus serrata Hill p. 95 fig. 23,24,26,27 |
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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.
†Nothofagus serrata Hill 1991
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. S. Hill 1991 | Leaf symmetrical, elliptical. Leaf length 4.5-5.8 cm, witdh 1.2-1.8 cm. Leaf apex retuse, base acute. Leaf margin serrate; serrations of one order, variable in size and morphology between specimens. One serration per secondary vein. Venation craspedodromous or weakly semicraspedodromous, with 16-22 secondary veins arising at a uniform angle from the primary vein and terminating in serrations after a straight or slightly curved course. Secondary veins branch just before the margin, with a weak apical branch looping into the superadjacent secondary vein. Intersecondary veins absent. Tertiary veins weakly percurrent, straight, oblique. Upper epidermal cells heavily cutinized, with well developed cuticular flanges. Venous cells larger and less heavily thickened than non-venous cells and clearly outlining the areoles. Trichomes absent from upper epidermis. Lower epidermal cells thinly cutinized, irregular. Venous cells more heavily cutinized and more regular in arrangement. Stomatal size extremely variable, stomates randomly arranged, but usually confined to areoles. Giant stomates present over veins. Large glandular trichomes present occasionally over veins. Other trichomes absent. Lower epidermis coated with wax, except for the stomatal openings. |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Age range: Early/Lower Oligocene or 33.90000 to 28.40000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Oligocene | Australia (Tasmania) | Nothofagus serrata (type locality: 166705) |