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Marmarthia
Genus Marmarthia K.R. Johnson Proc. Denver Mus. Nat. Hist., Series 3, (12): 4. 1 Apr 1996
- Name
- Marmarthia
- Rank
- Genus
- Authors (Pub.)
- Johnson K. R.
- Publication
- Description of seven common fossil leaf species from the Hell Creek Formation (Upper Cretaceous: Upper Maastrichtian) North Dakota, South Dakota, Montana [1996/4]
- Journal
- Proceedings of the Denver Museum of Natural History
- Annee/Jahrgang
- Series 3
- Issue
- 12
- Page number
- 4
- Year
- 1996
- Parent Taxon
- [Order] Laurales
- Fossil Status
- leaves
- Type
- Marmarthia trivialis
- Diagnosis
- Lamina elliptic to orbicular; apex acute to
acuminate; base acute to cordate; margin entire to toothed,
sometimes trilobate. Venation basal acrodromous to actinodromous
with the basal exmedial portion of the basal lateral
primaries (and sometimes secondaries) forming the
leaf margin. Lateral primaries with exmedial lateral
secondaries. Secondary venation brochidodromous to
eucamptodromous to craspedodromous. Tertiaries weakly
to strongly percurrent.
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