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Laurophyllum intramarginatum
Taxonomy
Laurophyllum intramarginatum was named by Hill (1986) [Number of specimens: One.
Parataxon NER/014 Hill 1982, p. 65, pl. 2 fig. 15.]. Its type specimen is Holotype: N-0022, housed in the Botany Department, University of Tasmania., a leaf (Cuticles), and it is a compression fossil. Its type locality is Nerriga Flora, which is in an Eocene/Eocene fluvial-lacustrine siltstone/mudstone in Australia.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1986 | Laurophyllum intramarginatum Hill p. 341 figs. 3 A, 14 A-F |
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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.
†Laurophyllum intramarginatum Hill 1986
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. S. Hill 1986 | Lamina. Symmetrical, obovate. Base acute, slightly asymmetrical; apex unknown. Leaf length at least 3 cm, width 1 cm. Petiole incomplete, slightly winged. Venation. Primary vein slightly sinuous, massive. Venation pattern brochidodromous. At least 7 secondary veins arise from the primary vein at a uniform angle of 65°. Secondary veins run almost straight to the margin and then curve sharply upward and loop into the superadjacent secondary vein. Simple and composite intersecondary veins occur commonly. Tertiary veins random reticulate. Lower epidermis. Non-venous cells irregular, with 6-8 sides and straight walls. Cuticular pegs and flanges well developed. Surface ornamented with fine striations and pittings. Venous cells longer and narrower than non-venous cells. Stomata generally confined to areoles, oriented at random. Unmodified stomata occur occasionally over veins. Trichome bases with a small, circular, very heavily thickened foot cell and unmodified basal cells occur rarely over veins. Trichomes not preserved. Upper epidermis. Non-venous cells slightly irregular, with 6-8 sides and straight walls. Cuticular flange well developed. Cells over large veins smaller and more regular than non-venous cells. |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Age range: base of the Early/Lower Eocene to the top of the Middle Eocene or 55.80000 to 37.71000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Eocene - Middle Eocene | Australia (New South Wales) | Laurophyllum intramarginatum (type locality: 166623) |