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Agathis tasmanica
Taxonomy
Agathis tasmanica was named by Hill and Bigwood (1987) [Twenty specimens of of A.
tasmanica have been recovered from the Little
Rapid River deposit, and several of these are complete leaves.]. Its type specimen is LRR 1-003, housed in the Botany Department, University of Tasmania., a leaf (Cuticle), and it is a compression fossil. 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 |
|---|---|
| 1987 | Agathis tasmanica Hill and Bigwood p. 332 figs. 4A-D, G-H |
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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.
†Agathis tasmanica Hill and Bigwood 1987
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. S. Hill and A. J. Bigwood 1987 | Leaves bilateral, linear to lanceolate, 43 to at least 75 mm long, 8-21 mm wide. Leaf base tapering to a broad petiole, apex rounded to almost acute. Margin entire, flat, and not appreciably thickened. Veins numerous, unbranching, parallel and inconspicuous. Leaf hypostomatous. Stomatal arrangement predominantly oblique, usually between 40° and 80° from the long axis of the leaf, in numerous long rows parallel to the long axis of the leaf. Guard cells sunken below subsidiary cells. Florin rings conspicuous. Stomatal apparatus 34 µm long (29-38 µm), 25 µm wide (19-31 µm). Mean number of subsidiary cells 4.4 (4-5). Stomatal plugs present. |
Measurements
No measurements are available
No ecological data are available
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) | Agathis tasmanica (type locality: 166705) |