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Acrovena laevis
Acrovena laevis L.J. Hickey Mem. Geol. Soc. Amer., 150: 143. 19 Jul 1977
- Name
- Acrovena laevis
- Rank
- Species
- Generic Name
- [Genus] Acrovena
- Authors (Pub.)
- Hickey L. J.
- Publication
- Stratigraphy and paleobotany of the Golden Valley Formation (Early Tertiary) of Western North Dakota [1977/7]
- Journal
- Memoirs of the Geological Society of America
- Volume
- 150
- Page number
- 143
- Year
- 1977
- Fossil Status
- leaves
- Stratigraphy
- Thanetian
- Location
- White Butte, Stark County, North Dakota, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- USNM 167532
- Diagnosis
- Leaf with I / w ratio 1.48; / approximately 6.2 cm; w4.2 cm; petiole incomplete, moderately stout just below the lamina; leaf surface smooth, not marked by the impressions of hairs, bristles, glands, or lepidote areas. Midvein bearing two pairs of acrodromous secondaries at its base and a third pair about 1 cm above it; secondaries opposite, slightly decurrent upon the midrib, completely separate from each other, the lowest pair weakly
developed and not extending above the middle of the leaf; exmedial tertiary origin acute, admedial origin obtuse; tertiary veins fine to hairlike, course obliquely transverse and slightly irregular as the result of anastomoses with faintly suggested crossveins, tertiaries parallel, forming a V pattern; higher order venation and the areolation obsolete.
