Aquatifolia fluitans Wang and Dilcher, 2006b

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 : 8

publication ID

https://doi.org/ 10.26879/841

DOI

https://doi.org/10.5281/zenodo.11187099

persistent identifier

https://treatment.plazi.org/id/03838A22-FF94-AA23-FF23-FC86FA96351F

treatment provided by

Felipe

scientific name

Aquatifolia fluitans Wang and Dilcher, 2006b
status

 

Aquatifolia fluitans Wang and Dilcher, 2006b

Figure 5.1-2 View FIGURE 5. 1-2

Description. Leaf shape wide ovate (length/width ratio 1.2:1) to very wide ovate ( L / W ratio 1:1 or less). Leaf base strongly cordate, with basal lobes overlapping or wide obtuse. Observed petiole length 28 mm long and 1.5 mm wide, containing a spherical float at a distance of ca. 10 mm from the leaf base (measured from the center of the spherical float to the leaf base). Float present on the petiole, spherical, sometimes appearing to be bilobed, or fusiform with some fine reticulate venation. Leaf margin entire, crenate, or strongly crenate. Typically, three veins entering a tooth with one medial vein perpendicular to the leaf margin and two flanking lateral veins (tertiary or quaternary) running along the margin before joining the medial vein. Primary venation is actinodromous or basal actinodromous; course of primary veins sinuous or straight; typically, one medial and four lateral primary veins (in two pairs) present in one leaf lamina. Primary veins and lateral secondary veins may fork up to three to four times, and adjacent branches join to form five ‐ to six ‐ sided elongate meshes oriented perpendicular to the leaf margin. All lateral primary veins and exmedial branches of lateral primary veins apically curved. Veins of higher order (tertiary or quaternary) orthogonally reticulate, forming quadrangular or pentagonal small meshes within those meshes formed by primary and secondary veins. Near the leaf margin, the veins dichotomize into veins of tertiary or quaternary order to form anastomosing loops from which arise one medial and two lateral veins that enter the tooth. Quinternary veins also orthogonally reticulate, forming the smallest polygonal meshes.

Number of specimens examined. 75.

Specimens illustrated. UF 15706-8263, 8263′ ( Figure 5.1 View FIGURE 5. 1-2 ); 24120 ( Figure 5.2 View FIGURE 5. 1-2 ).

Occurrences. Hoisington III locality, Kansas.

Remarks. Two specimens from Wang and Dilcher (2006b) are illustrated in this report. Figure 5.1 View FIGURE 5. 1-2 is the holotype specimen of Aquatifolia fluitans , showing the spherical float on the petiole. Figure 5.2 View FIGURE 5. 1-2 is a paratype specimen showing actinodromous primary venation and ovate leaf shape.

L

Nationaal Herbarium Nederland, Leiden University branch

W

Naturhistorisches Museum Wien

UF

Florida Museum of Natural History- Zoology, Paleontology and Paleobotany

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF