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Anisodromum
Genus Anisodromum Upchurch, Dilcher Bull. U.S. Geol. Surv., (1915): 42. Dec 1990
- Name
- Anisodromum
- Rank
- Genus
- Authors (Pub.)
- Upchurch G. R., Jr.
Dilcher D. L.
- Publication
- Cenomanian angiosperm leaf megafossils, Dakota Formation, Rose Creek locality, Jefferson County, southeastern Nebraska [1990/12]
- Journal
- Bulletin of the United States Geological Survey
- Issue
- 1915
- Page number
- 42
- Year
- 1990
- Parent Taxon
- [Subclass] Rutidae
- Fossil Status
- leaves
- Type
- Anisodromum wolfei
- Diagnosis
- Leaf compound, lamina of each leaflet elliptic, base acute, with a distinct petiolule present on each leaflet, margin entire. Primary venation pinnate.
Secondary venation tending toward eucamptodromous but with tendencies to form brochidodromous loops; secondary veins originating at an angle greater than 45°, distinctly asymmetric in behavior, with the secondary
veins on one side of the lamina either diverging from the midvein at a higher angle or curved for a greater proportion of their length; each secondary vein producing its own series of weakly formed brochidodromous loops that
extends to near the margin. Tertiary venation weakly percurrent; tertiary veins thin, closely spaced, with low angle branching, oriented at nearly a right angle to the midrib.
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