|
Figure 5. Platycarya sp., USNM 535053. (1) Complete
specimen, showing course of secondary veins, turning distally near margin, and
small, irregularly spaced teeth. Scale bar equals 1 cm. Note two large, circular
insect-feeding holes distal to middle left of blade. Inset for (2) detail
of margin near base of blade, showing opposite percurrent, straight to sinuous
tertiary veins joining subjacent secondaries mostly at perpendicular angles, and
some quaternary veins. Scale bar equals 0.5 mm. The small blurry areas result
from stitching of this composite image; dark areas are coal remnants not
removed, to avoid damage. (3) Detail taken immediately distal to (2)
along left margin of blade, showing secondaries (ascending and curving towards
upper left) and opposite percurrent, straight to sinuous tertiary veins. Scale
bar equals 1 mm. Dark areas are coal remnants not removed, to avoid damage.
|