Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
Author
Wang, Hongshan
Author
Dilcher, David L.
text
Palaeontologia Electronica
2018
34 A
2018-09-30
21
3
1
49
http://dx.doi.org/10.26879/841
journal article
10.26879/841
1094-8074
11062827
Crassidenticulum trilobum
Dilcher and Wang, 2006a
Figure 4.2
Description.
Leaf trilobate. Petiole up to
6.5 cm
long and
1 mm
wide. Sinus between lobes more than 80% of lamina length, structurally reinforced by lamina tissue. Margin toothed with angular sinus; five to ten serrations per cm with axes inclined to the tangent of the leaf margin; apical angle of tooth acute. Primary venation actinodromous; primary veins massive with straight course. Middle lobe base symmetrical whereas lateral lobe bases strongly asymmetrical. Secondary veins thin; angle of divergence moderate to wide acute; course of secondary veins uniformly curved before joining exmedial branches of superadjacent secondary vein forming intercostal regions irregular in shape and size; intersecondary veins common. Veins of secondary order or higher poorly preserved.
Number of specimens examined.
1.
Specimens illustrated.
UF
15706-24677 (
Figure 4.2
).
Occurrences.
Braun Ranch and Hoisington III localities,
Kansas
.
Remarks.
This species is common in the Braun Ranch locality,
Kansas
(Wang and Dilcher, 2006a). Though only
one specimen
is observed from the Hoisington III locality, a suite of characters, including trilobate leaf, massive multi-stranded primary vein, secondary venation pattern, and its chloranthoid tooth
type
are consistent with those described by Wang and Dilcher (2006a).