Jarzenia kanbrasota, Wang and Dilcher, 2009

Wang, Hongshan & Dilcher, David L., 2018, Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA, Palaeontologia Electronica (34 A) 21 (3), pp. 1-49 : 18

publication ID

https://doi.org/ 10.26879/841

DOI

https://doi.org/10.5281/zenodo.11187133

persistent identifier

https://treatment.plazi.org/id/03838A22-FF82-AA35-FF27-FC27FC34363F

treatment provided by

Felipe

scientific name

Jarzenia kanbrasota
status

 

Jarzenia kanbrasota Wang and Dilcher, 2009

Figure 11.1 View FIGURE 11. 1

Description. Lamina elliptic, L / W 2.5, 3.5 to 4 cm wide and 9 to 10 cm long (estimated length). Apex missing. Base acute, decurrent. Margin entire. Petiole missing. Primary venation pinnate; primary vein stout, multi-stranded, course straight. Secondary venation brochidodromous; secondary vein moderate relative to primary vein.>eight pairs per lamina, opposite to subopposite, decurrent; spacing irregular; angle of divergence narrow acute (<45º), uniformly curved to join exmedial branches of superadjacent secondary veins to form one series of loops. Intersecondary veins present, course simple. Tertiary veins not well preserved.

Number of specimens examined. 2.

Specimens illustrated. UF 15706-3171 ( Figure 11.1 View FIGURE 11. 1 ).

Occurrences. Hoisington III locality, Kansas and Courtland I locality, Minnesota.

Remarks. Jarzenia kanbrasota differs from Setterholmia rotundifolia (Lesquereux) Wang and Dilcher, 2009 in that J. kanbrasota has oblanceolate or narrow obovate shape, more cuneate leaf base, lowest one or two pairs of secondary veins originating at more acute angles than those above, not well defined intercostal regions, less percurrent tertiary veins, and the absence of glands on leaf lamina and veins. Jarzenia kanbrasota is very common at several localities of the Dakota Formation in Kansas and Nebraska based upon observation of specimens stored in the Paleobotany and Palynology collection at the Florida Museum of Natural History.

L

Nationaal Herbarium Nederland, Leiden University branch

UF

Florida Museum of Natural History- Zoology, Paleontology and Paleobotany

I

&quot;Alexandru Ioan Cuza&quot; University

J

University of the Witwatersrand

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