Paleogeographic schematic of the Texas area showing rift and drainage systems in the Upper Triassic (after Gawlowski, 1983 and McGowan et al. 1979). The approximate location of the subject well is indicated with a star. Circled numbers correspond to the stratigraphic columns depicted in Text-Figure 1⇑.
Plaesiodictyon occurrences plotted on a Carnian/Norian plate reconstruction (after Smith et al. 1994). Locality numbers are keyed to Table 1⇓. The star indicates the geographic position of the specimens discussed in this paper.