Back
Ternstroemites aureavallis
Ternstroemites aureavallis L.J. Hickey Mem. Geol. Soc. Amer., 150: 141. 19 Jul 1977
- Name
- Ternstroemites aureavallis
- Rank
- Species
- Generic Name
- [Genus] Ternstroemites
- 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
- 141
- 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 167527
Data for Paratypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- USNM 167529 [pl. 43: 5], USNM 167528 [pl. 44: 2], USNM 167530 [pl. 44: 1], USNM 167531 [pl. 45: 3]; Princeton University 20005 [pl. 45: 7], 20008, 20009, 20013 [pl. 45: 1], 20046
- Diagnosis
- Leaves showing much variation in size and general outline; shape ovate-lanceolate to narrow ovate; l / w ratio usually between 2 and 3, extreme 4; / from 8 to 19 cm; w from 2 to 9.2 cm; leaf apex and base both acuminate; margin mildly crenate, with the crenations often approaching serrations in shape, entire toward the base, upper side of crenations marked by a thickened organic deposit at the termination of the tertiary veins with the margin; rarely a thick marginal bristle occupies this position petiole moderate to stout, ranging up to 1.2 cm in length; leaf texture coriaceous. Venation mostly eucamptodromous; midvein stout; secondaries subopposite to alternate, in 10 to 12 pairs, diverging from the midvein at an angle of 60° to 65°; thin; gradually curving apically toward the margin, occasionally forking about midway; secondaries ascending along the margin, mostly connected to the superadjacent secondary by a series of percurrent tertiaries, though occasionally brochidodromous; distal parts of the secondaries becoming increasingly irregular owing to tertiary branches; intersecondary veins very rarely present; crenations 5 to 6 per secondary vein. Tertiary veins relatively thick compared to the secondaries; admedial origin at right angles; exmedial origin mostly acute; course slightly irregular; distal intercostal tertiaries mostly percurrent, becoming alternate and finally recurved proximally; outer distal set of tertiaries passing to the margin and terminating in a gland. Quaternary venation relatively thick, irregular; quinternary venation also relatively thick and poorly developed; highest order of venation showing excurrent branching, third; areolation imperfect, equant and polygonal,
2 to 3 mm in diameter.
