Back
Dombeya novi-mundi
Dombeya novi-mundi L.J. Hickey Mem. Geol. Soc. Amer., 150: 138. 19 Jul 1977
- Name
- Dombeya novi-mundi
- Rank
- Species
- Generic Name
- [Genus] Dombeya
- 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
- 138
- Year
- 1977
- Fossil Status
- leaves
- Stratigraphy
- Thanetian
- Location
- On the Crooked Creek escarpment, Dunn County, North Dakota, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- USNM 43710
Data for Paratypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- USNM P 43711 [pl. 42: 1], 43712-43713; Princeton University 20113
- Diagnosis
- Leaves symmetrical; palmately 3 to 5 lobed; very wide ovate; l / w ratio
0.7 to 0.89; / from slightly less than 8 cm to 18 cm; w slightly less then 9 cm to 24 cm; apex acute; base deeply cordate; margin obtusely dentate with extreme apices of dentations glandular and asymmetric; petiole thick, length undetermined; leaf texture subcoriaceous and perhaps hairy. Venation perfect marginal actinodromous; primary veins 5 to 7, radiating from the top of the petiole; the two lowest pairs much thinner than those above, which
are thick; course straight to the margin; secondary veins diverging from the central primary and from the outer side of the lateral primaries at an angle between 50° to 65°, thick, uniformly slightly upcurved, occasionally branched, and running into the dentations. Tertiaries from the outer side of the secondaries at large acute or right angles, from the inner side at right angles, thick, strongly percurrent, straight to slightly sinuous, recurved into the primaries, predominantly alternate. The orders of the higher rank venation distinct; both the quaternary and quinternary veins thick and orthogonal; highest order of venation, seventh; highest order showing excurrent branching, sixth. Marginal ultimate venation with recurved loops. Areolation equant and rectangular, small (0.11 to 0.18 mm), well developed, and without freely ending veinlets.
