Genus Orthorhabdus Bramlette and Wilcoxon, 1967
Description: Optical orientation similar to T. rugosus (i.e. with c-axis perpendicular to length), but triangular-shaped and median blade broader than lateral blades. So usually lies in orientation showing high birefringence.
Remarks:
Type species: Orthorhabdus serratus Bramlette and Wilcoxon, 1967
Original description:
Neogene: Orthorhabdus; Orthorhabdus serratus