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Betula leopoldae
Taxonomy
Betula leopoldae was named by Wolfe and Wehr (1987) [Holotype par side in the UW Burke Museum collections, counterpart side in the UCMP collections]. Its type specimen is UW 39722; UCMP 9286 (counter- part). Paratype. UW 31256., a leaf, and it is a compression fossil. Its type locality is Republic Locality 8428, which is in a Lutetian/Bartonian lacustrine horizon in the Klondike Mountain Formation of Washington.
Sister species lacking formal opinion data
Synonymy list
Year | Name and author |
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1987 | Betula leopoldae Wolfe and Wehr pp. 15-16 |
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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.
†Betula leopoldae Wolfe and Wehr 1987
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Diagnosis
Reference | Diagnosis | |
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J. A. Wolfe and W. Wehr 1987 | Leaves simple; shape narrowly ovate, apex acuminate, base obtuse; margin serrate, apical angle acute, serration types typcially D-2 to D-4, sinuses angular, spacing regular, teeth com- pound with typically two subsidiary teeth on basal flank of major teeth; petiole normal, 0.8 cm long; venation pinnate; about 12 pairs of secondary veins, departing at a 45° angle, straight, craspedodromous, entering teeth centrally in basal and medial parts of lamina and entering teeth basally in apical part then bending sharply toward apex; typically two external secondary veins per secondary, craspedodromous; in- tersecondary veins absent; tertiary veins spaced about 0.8 cm apart, percurrent, opposite or alternate, slightly convex; quaternaries forming an irregularly polygonal mesh; quinternaries forming irregularly polygonal areoles; veinlets stout, branching once or twice. |