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Tolmania aquatica
Taxonomy
Tolmania aquatica was named by Edmonds et al. (2022). Its type specimen is S51105 and counterpart S55178 UAPC-ALTA, a multi organs (Material of T. aquatica gen. et sp. nov. consists of three incomplete rosettes compressed in apical view (specimen numbers S55180 A and B, S52542/S52581, and S5), and it is a compression fossil. It is the type species of Tolmania.
Synonymy list
| Year | Name and author |
|---|---|
| 2022 | Tolmania aquatica Edmonds et al. p. 568 |
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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.
†Tolmania aquatica Edmonds et al. 2022
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| N.L. Edmonds et al. 2022 | Aquatic dicot with determinate growth of floating shoots. Stem up to 8 mm in diameter; internodal lengths decrease toward apex. Leaf attachment opposite/decussate. Leaves heterophyllous, in heteroblastic series; simple and sessile at apicalmost node, simple and petiolate at second node, compoundwith three leaflets at nodes 3–6. Compound leaves petiolate, ternate (trifoliate). Leaves and leaflets increase in size away from apical node. Length-to-width ratio (leaf and/or leaflet) changes from 2∶1 to 1∶1 on basalmost leaves. Leaflet shape unlobed, obovate, symmetrical; base acute-obtuse, apex angle obtuse; base shape convex; petiolar attachment marginal; apex shape rounded; margin crenate. Primary veins flabellate to pinnate, three to five basal veins, dichotomize distally. Secondary veins craspedodromous, spacing uniform, angle uniform.
Intersecondary veins lacking. Teeth of single order, three per centimeter near apex, convex-convex; sinus angular; principal vein present, marginal veins at tooth apex; accessory veins convex, looped, apex foraminate. |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Age range: Maastrichtian or 72.20000 to 66.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Maastrichtian | Canada (Alberta) | Tolmania aquatica (106007) |