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Gymnostoma tasmanianum
Taxonomy
Gymnostoma tasmanianum was named by Guerin and Hill (2003) [Paratypes. LRR1 287, LRR1 1774–75, LRR1 1776, LRR1 4009, LRR1 4010–4011, LRR2 031-033, LRR2 034, LRR2 035–036, LRR2 037, LRR2 038–039, LRR2 331, LRR2 332–333, LRR2 334.
Type locality: Little Rapid River, Tasmania, Australia:
41°09'S, 145°14'E, altitude 90 m a.s.l.]. It is considered to be a form taxon. Its type specimen is Holotype. LRR2 154, housed in the Department of Environmental Biology, University of Adelaide., a fertile axis, and it is a compression fossil. Its type locality is Little Rapid River 2, which is in an Oligocene lacustrine mudstone/sandstone in Australia.
Synonymy list
| Year | Name and author |
|---|---|
| 2003 | Gymnostoma tasmanianum Guerin and Hill p. 632 figs. 1, 2 |
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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.
†Gymnostoma tasmanianum Guerin and Hill 2003
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Guerin and R. S. Hill 2003 | Teeth acute at apices and sinuses and slightly obtuse in shape. Stomata in two to five (commonly two to three) rows within bands. Trichomes absent. Teeth small in length and width (0.27–0.47 mm and 0.14–0.27 mm, respectively), articles short in length (0.86–0.27 mm). Stomata small in length and width (guard cells 13.3–21.6 µm long x 6.4–9.3 µm wide; guard cells and subsidiary cells 13.3–22.4 µm long x 9.6–21.8 µm wide). |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Age range: base of the Early/Lower Oligocene to the top of the Late/Upper Oligocene or 33.90000 to 23.04000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Oligocene | Australia (Tasmania) | Gymnostoma tasmanianum (166705) | |
| Late/Upper Oligocene | Australia (Tasmania) | Gymnostoma tasmanianum (type locality: 167317) |