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Myrtaciphyllum annulatum
Taxonomy
Myrtaciphyllum annulatum was named by Hill and Merrifield (1993) [Holotype, only specimen observed.]. It is considered to be a form taxon. Its type specimen is Holotype. WAM P.84.97, stored in the Western Australian Museum., a leaf, and it is an impression. Its type locality is West Dale, which is in an Eocene/Oligocene channel lag siltstone/sandstone in Australia.
Synonymy list
| Year | Name and author |
|---|---|
| 1993 | Myrtaciphyllum annulatum Hill and Merrifield p. 320 figs. 10E-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.
†Myrtaciphyllum annulatum Hill and Merrifield 1993
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. S. Hill and H. E. Merrifield 1993 | Leaf lanceolate, base and apex unknown. Secondary veins well-defined and relatively closely spaced, running straight from the primary vein to the intramarginal vein at a relatively oblique angle; tertiary veins prominent. Randomly arranged stomates restricted to one leaf surface, subsidiary cell arrangement anomocytic. Guard cells form almost circular stomates, many of which are heavily plugged. Epidermal cell walls straight or slightly undulating on both leaf surfaces. Trichomes absent. |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Age range: base of the Middle Eocene to the top of the Oligocene or 47.80000 to 23.03000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Eocene - Oligocene | Australia (Western Australia) | Myrtaciphyllum annulatum (type locality: 167545) |