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Sigmaphyllum tasmanensis
Taxonomy
Sigmaphyllum tasmanensis was named by Hill and Scriven (1999) [Specimens examined: LRR1-2034, 2035.]. It is considered to be a form taxon. Its type specimen is Holotype: LRR2-3139, housed in the School of Plant Science, University of Tasmania., a leaf (Cuticle), 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 |
|---|---|
| 1999 | Sigmaphyllum tasmanensis Hill and Scriven p. 719 figs. 11-–14 |
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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.
†Sigmaphyllum tasmanensis Hill and Scriven 1999
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. S. Hill and L. J. Scriven 1999 | Leaves only slightly sinuous, apex upturned less than 20° to the long axis of the leaf. Leaves narrowing to about one third of their maximum width at the base. Inner cuticular surface granular, hypoplastic stomata absent, cuticle at inner surface of stomatal pore thickened. |
Measurements
No measurements are available
No ecological data are available
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) | Sigmaphyllum tasmanensis (166705) | |
| Late/Upper Oligocene | Australia (Tasmania) | Sigmaphyllum tasmanensis (type locality: 167317) |