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Nothofagus lobata
Taxonomy
Nothofagus lobata was named by Hill (1991) [LRR1-007,013,016,017,059,063,069,070,255,259,284,517,863,865,867,875,878,886,894-897,905,906,921,924,925,929,946,948,954,967,968,975,979,980]. It is not extant. It is considered to be a form taxon. Its type specimen is LRR1-886, 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 lobata Hill pp. 95-96 figs. 28-35 |
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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 lobata Hill 1991
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. S. Hill 1991 | Leaf symmetrical, elliptical to ovate. Leaf length 0.9-5.4 cm (mean of 11 specimens = 2.7 cm), width 0.6-2.1 cm (mean = 1.4 cm). Leaf apex acute on large specimens, rounded on small specimens; bae usually acute, sometimes asymmetrical. Leaf margin serrate, with up to four serrations per secondary veins; serrations of one or two orders, with an acute apex and convex basal side. Venation craspedodromous, with 4-10 secondary veins arising at a uniform angle from the primary vein and following a slightly irregular course to the margin. Two or three basally directed branches arise from each secondary vein near the margin and terminate in serrations, as does the secondary vein. Intersecondary veins absent. Tertiary veins weakly percurrent, convex, oblique. Fimbrial vein absent. Upper epidermal cells heavily cutinized, irregular, with cuticle extending between cells to form cuticular pegs and flanges. Venous cells more regularly arranged than non-venous cells. Unicellular conical trichome bases with unmodified basal cells occur over the veins. Trichomes short, non-glandular, unicellular, tapering to an acute apex. Lower epidermal cells thinly cutinized, irregular, with somewhat sinuous walls. Venous cells smaller, heavily cutinized and with straight walls. Stomates confined to areoles, aligned more or less parallel with the long axis of the leaf. Heavily thickened T-pieces of cutin present between the guard cells at the stomatal poles. Subsidiary cells cyclocytic, more heavily and irregularly cutinized than epidermal cells. Non-glandular trichomes absent from lower epidermis. Smaller glandular trichome bases present rarely on the lower epidermis. |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Age range: Early/Lower Oligocene or 33.90000 to 27.30000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Oligocene | Australia (Tasmania) | Nothofagus lobata (type locality: 166705) |