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Celtis aspera
Taxonomy
Celtis aspera was named by Manchester (2014) [Newberry J. S. 1868. Notes on the later extinct floras of North America, with descriptions of some new species of fossil plants from the Cretaceous and Tertiary strata. Pt 2. The Tertiary flora of North America. Ann New York Lyc Nat Hist 9:27-76]. It is an impression.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2002 | Celtis aspera Manchester et al. |
| 2014 | Celtis aspera Manchester pp. 727-728 figs. 2-5 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Celtis aspera Manchester 2014
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. R. Manchester et al. 2002 | Leaves simple. Petiole 1-1.5 mm thick, of moderate length (approximately one-third of the length of lamina, 5-30 mm. Lamina ovate to lanceolate, length 2.4-12 cm, width 1.4-7 cm, length/width ratio 1.6-2.6; base symmetrical to less commonly asymmetrical, rounded to cordate, apex attenuate, acute, margin serrate with simple, nonglandular teeth. Teeth acute to obtuse, with straight to convex apical and basal flanks, typically right-angled, with enervation submedial, sinuses acute to right angled. Venation pinnate, midvein straight, secondary veins craspedodromous, straight to slightly curved, six to nine pairs, arising at angles of 20°-45° (avg. 30°) from the midvein; basal pairs commonly with successive abmedial branches extending to the teeth. Tertiary veins oppositely percurrent, straight to convex, closely spaced (0.8-1.3 mm apart), orientation mostly perpendicular to the secondary veins or their branches in lower part of the lamina and mostly perpendicular to the primary vein in the upper half; quaternary veins forming quadrangular to pentagonal areoles giving off quinternary veinlets that are straight, branched, or curved; surface of smaller leaves beset with numerous small bumps. Endocarps globose to subglobose-ovoidal, 2.9-5.0 mm in diameter. Base rounded, apex mostly rounded, but with a beaklike protuberance containing a perforation or canal through which the placentary bundle passes. Surface sculpture consisting of two meridional ribs, one in the plane of suture of the two valves, the other somewhat weaker, defining a plane at right angles to that of the first. Intervening sculpture consisting of a veinlike reticulum of small ridges that outline numerous small depressions. Unilocular with a smooth locule surface. |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Age range: base of the Early/Lower Paleocene to the top of the Paleocene or 66.00000 to 56.00000 Ma
Collections (29 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Paleocene | USA (Montana) | Viburnum asperum (53692) | |
| Paleocene | USA (Wyoming) | Viburnum asperum (40825 57977 57986 57990 57996 57997) | |
| Paleocene | USA (Montana) | Viburnum asperum (31538 53536 53539 53693 53943 53948 53960 55851) | |
| Paleocene | USA (New Mexico) | Viburnum asperum (43161) | |
| Paleocene | USA (North Dakota) | Viburnum asperum (58017 58033 58036) | |
| Tiffanian | USA (Wyoming) | Celtis aspera (28632 28633 28636 28637 28638 28641 28644) | |
| Late/Upper Paleocene | USA (Wyoming) | Celtis aspera (129224 129225) | |
| Clarkforkian | USA (Wyoming) | Celtis aspera (28646) |