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Laurophyllum acutum
Taxonomy
Laurophyllum acutum was named by Hill (1986) [Number of specimens: Four.
Parataxon NER/020 Hill 1982, p. 67, pl. 6 fig. 44.]. Its type specimen is Holotype: N-0005, 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 acutum Hill p. 334 figs. 2 D, 10 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 acutum Hill 1986
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. S. Hill 1986 | Lamina. Symmetrical, elliptical. Base obtuse, slightly asymmetrical; apex unknown. Leaf length at least 6.5 cm, width
1.7-2.5 cm. Petiole unknown. Venation. Primary vein slightly curved, stout. Venation pattern brochidodromous. 17-21 secondary veins arise from the primary vein at a uniform angle of 61-69°. Higher order vein arches well formed. Well developed simple and composite intersecondary veins common. Tertiary veins transverse ramified or random reticulate. Lower epidermis. Non-venous cells irregular, with a variable number o f sides and straight or curved walls. Cuticular flange well developed. Venous cells narrower than nonvenous cells. Stomata generally confined to areoles, oriented at random. Larger stomata occur occasionally over veins. Trichome bases with a small, heavily thickened foot cell and radial basal cells occur rarely over veins. Trichomes not preserved. Upper epidermis. As for lower epidermis, except stomates and trichome bases absent, cuticular flange moderately developed, and cells over major veins smaller, narrower, and more regular than non-venous cells. |