Plate P2. 1, 2. Distephanus boliviensis (Sample 185-1149A-10H-5, 135-141 cm); (1) low focus, (2) high focus. 3, 4. Distephanus speculum minutus (Sample 185-1149A-9H-6, 142-148 cm); (3) low focus, (4) high focus. 5, 6. Dictyocha perlaevis perlaevis (Sample 185-1149A-10H-2, 134-140 cm); (5) high focus, (6) low focus. 7, 8. Distephanus speculum speculum (Sample 185-1149A-8H-3, 127-133 cm); (7) high focus, (8) low focus. 9. Dictyocha aspera (Sample 185-1149A-10H-1, 135-141 cm). 10. Distephanus crux (Sample 185-1149A-10H-2, 134-140 cm). 11. Mesocena circulus (Sample 185-1149A-10H-2, 134-140 cm). 12. Dictyocha fibula (Sample 185-1149A-10H-5, 131-141 cm). 13. Corbisema triachantha (Sample 185-1149A-10H-3, 125-131 cm). 14,?. Aberrant morphotypes (Sample 185-1149A-5H-3, 131-137 cm).

Plate P2. 1, 2. Distephanus boliviensis (Sample 185-1149A-10H-5, 135-141 cm); (1) low focus, (2) high focus. 3, 4. Distephanus speculum minutus (Sample 185-1149A-9H-6, 142-148 cm); (3) low focus, (4) high focus. 5, 6. Dictyocha perlaevis perlaevis (Sample 185-1149A-10H-2, 134-140 cm); (5) high focus, (6) low focus. 7, 8. Distephanus speculum speculum (Sample 185-1149A-8H-3, 127-133 cm); (7) high focus, (8) low focus. 9. Dictyocha aspera (Sample 185-1149A-10H-1, 135-141 cm). 10. Distephanus crux (Sample 185-1149A-10H-2, 134-140 cm). 11. Mesocena circulus (Sample 185-1149A-10H-2, 134-140 cm). 12. Dictyocha fibula (Sample 185-1149A-10H-5, 131-141 cm). 13. Corbisema triachantha (Sample 185-1149A-10H-3, 125-131 cm). 14, 15. Aberrant morphotypes (Sample 185-1149A-5H-3, 131-137 cm).