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Laurophyllum acrodromum
Taxonomy
Laurophyllum acrodromum was named by Hill (1986) [Number of specimens: Two.
parataxon NER/012 Hill 1982, p. 64, pl. 2 fig. 14.]. It is not extant. Its type specimen is N-0078,housed in the Botany Department, University of Tasmania., a leaf (Cuticles). 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 acrodromum Hill p. 329 figs. 2 A, 7 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 acrodromum Hill 1986
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. S. Hill 1986 | Lamina. Symmetrical, ovate. Base acute, symmetrical; apex unknown. Leaf length at least 8.5 cm, width 2-2.8 cm. Petiole incomplete, apparently normal. Venation. Primary vein straight, stout. Venation pattern suprabasal, imperfect, acrodromous. Two strongly developed secondary veins arise from the primary vein just above the leaf base and run in convergent arches toward the apex, terminating well before it. Six secondary veins arise from the primary vein at an average angle of 57-62°. Apart from the basal pair of secondary veins this angle is uniform. Tertiary veins strongly percurrent. Lower epidermis. Non-venous cells irregular,
with a variable number of sides and straight or curved walls. Cuticular pegs and flanges highly variable. Venous cells markedly longer and narrower than non-venous cells. Stomata generally confined to areoles, oriented at random. Larger stomata occur occasionally over veins. Trichome bases with a small, circular, thickened foot cell and unmodified basal cells occur over and rarely between veins. Trichomes not preserved. Upper epidermis. As for lower epidermis, except stomata absent and trichome bases with a small, irregularly shaped, very heavily thickened foot cell and heavily thickened basalcells occur rarely over veins. |