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Dicotylophyllum oblongatum
Dicotylophyllum oblongatum L.J. Hickey Mem. Geol. Soc. Amer., 150: 149. 19 Jul 1977
- Name
- Dicotylophyllum oblongatum
- Rank
- Species
- Generic Name
- [Genus] Dicotylophyllum
- 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
- 149
- Year
- 1977
- Fossil Status
- leaves
- Stratigraphy
- Thanetian
- Location
- In the northern part of the Fairy Dells, Dunn County, North Dakota, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- USNM 167533
- Diagnosis
- Leaf oblong, l/w ratio 2.6; 14.5 cm; w 1.7 cm; apex acuminate; base acute;
margin entire; petiole missing; leaf texture chartaceous. Venation pinnate, primary vein thin and somewhat irregular in course; secondaries in eight pairs, diverging at angles of from 50° to 65°, eucamptodromous, thin and slightly irregular in course; lower and middle tertiaries irregularly percurrent, opposite, upper ones anastomosing; tertiaries thin; admedial and
exmedial origins right angles; higher order venation reticulate; highest vein order, sixth; highest order with excurrent branching, fifth; marginal ultimate venation recurved; areolation of uniform size, equant and polygonal, without freely ending veinlets, 0.2 to 0.5 mm in diameter.
