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Laurophyllum angulosum
Taxonomy
Laurophyllum angulosum was named by Hill (1986) [Number of specimens: Four.
Parataxon NER/018 Hill 1982. p. 66, pl. 4 fig. 32.]. Its type specimen is Holotype: N-0097, 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 |
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1986 | Laurophyllum angulosum Hill p. 337 figs. 2 E, 11 A-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.
†Laurophyllum angulosum Hill 1986
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Diagnosis
Reference | Diagnosis | |
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R. S. Hill 1986 | Lamina. Symmetrical, elliptical. Base acute, symmetrical; apex unknown. Leaf length at least 9.5 cm, width 2.2 cm. Petiole unknown. Venation. Primary vein straight, stout to massive. Venation pattern brochidodromous. About 20 secondary veins arise from the primary vein at an average angle of 71 °. This angle increases from basal to apical secondaries. Higher order vein arches well formed. Composite intersecondary veins common. Tertiary veins random reticulate. Lower epidermis. Non-venous cells irregular, with a variable number of sides and straight or slightly curved walls. Cuticular flange well developed. Cells over major veins longer and narrower than non-venous cells. Stomata confined to areoles, oriented at random. Large, very thin cuticular flaps extend into substomatal cavities. Trichome bases with a small, irregularly shaped, heavily thickened foot cell and unmodified basal cells occur over veins. Trichomes not preserved. Upper epidermis. Non-venous cells irregular, with 4-5 sides and straight walls. Cuticular flange well developed. Cells over higher-order veins 4-sided and regular. Trichome bases with a small, irregularly shaped, heavily thickened foot cell and small basal cells occur rarely over veins. Trichomes not preserved. |