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Lomatia xeromorpha
Taxonomy
Lomatia xeromorpha was named by Carpenter and Hill (1988) [Type locality: Cethana, Tasmania (41°32'S, 146°07'E).]. It is considered to be a form taxon. Its type specimen is Holotype: C-217, housed in the Botany Department, University of Tasmania., a leaf (Cuticle), and it is a compression fossil. Its type locality is Cethana Dam, which is in an Oligocene lagoonal siltstone/sandstone in Australia.
Synonymy list
| Year | Name and author |
|---|---|
| 1988 | Lomatia xeromorpha Carpenter and Hill p. 143 figs. Plate I, 1 |
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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.
†Lomatia xeromorpha Carpenter and Hill 1988
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. J. Carpenter and R. S. Hill 1988 | Leaf arrangement bipinnatisect. Primary lobes up to 15 mm long. Secondary lobes up to 7 mm long, linear, entire, apex blunt or mucronate. Secondary lobe sinus angular and acute. Midvein clearly visible. Secondary venation brochidodromous. Cuticle thick, and cuticular flange between epidermal cells well developed. Normal epidermal cells isodiametric, randomly shaped, commonly pentagonal or hexagonal. Anticlinal cell walls on non-stomatal surface usually straight. Striations present on epidermal cells. Leaves hypostomatic, long axis of guard cells usually parallel to midvein. Stomates usually paratetracytic, about 32 µm long, 26 µm wide. A T-piece of thickened cutin often visible at poles of guard cells. Trichome base single-celled, with a thickened ring of cuticle, present on both leaf surfaces, but more frequent on stomatal surface. |
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) | Lomatia xeromorpha (type locality: 166832) |