Plate P10. Discoasteraceae V. Taxonomic organization and concepts are generally comparable to those of Young and Bown (1997) and Bown (2005). Images with black background are cross-polarized light images; those with light backgrounds are phase-contrast images. 1, 2. Discoaster araneus; (1) Sample 198-1208A-36X-CC, 8 cm, (2) Sample 198-1208A-36X-CC, 2 cm. 3. Discoaster cf. D. araneus (Sample 198-1208A-36X-CC, 12 cm). 4, 5. Discoaster barbadiensis (Sample 198-1208A-36X-CC, 1.5 cm). 6. Discoaster binodosus (Sample 198-1208A-36X-CC, 1.5 cm). 7–12, 21, 28. Discoaster diastypus; (7, 8) Sample 198-1208A-36X-2, 99 cm, (9–12, 21, 28) Sample 198-1208A-36X-CC, 1.5 cm. 13, 14. Discoaster lenticularis; (13) Sample 198-1208A-36X-CC, 4 cm, (14) Sample 198-1208A-36X-CC, 12 cm. 15, 16. Discoaster mahmoudii (Sample 198-1208A-36X-CC, 4 cm). 17. Discoaster mediosus (Sample 198-1208A-36X-CC, 4 cm). 18. Discoaster mohleri (Sample 198-1208A-36X-CC, 12 cm). 19, 20, 24–27. Discoaster cf. D. araneus; (19, 24–26) Sample 198-1208A-36X-CC, 12 cm, (20) Sample 198-1208A-36X-CC, 14 cm, (27) Sample 198-1208A-36X-CC, 4 cm. 22. Discoaster lodoensis (Sample 198-1208A-36X-2, 55 cm). 23. Discoaster tanii (Sample 198-1208A-35X-CC). 29, 30. Discoaster multiradiatus (Sample 198-1208A-36X-CC, 1.5 cm). 31. Discoaster mediosus (Sample 198-1208A-36X-CC, 4 cm). (Plate shown on next page.)

Plate P10. Discoasteraceae V. Taxonomic organization and concepts are generally comparable to those of Young and Bown (1997) and Bown (2005). Images with black background are cross-polarized light images; those with light backgrounds are phase-contrast images. 1, 2. Discoaster araneus; (1) Sample 198-1208A-36X-CC, 8 cm, (2) Sample 198-1208A-36X-CC, 2 cm. 3. Discoaster cf. D. araneus (Sample 198-1208A-36X-CC, 12 cm). 4, 5. Discoaster barbadiensis (Sample 198-1208A-36X-CC, 1.5 cm). 6. Discoaster binodosus (Sample 198-1208A-36X-CC, 1.5 cm). 7–12, 21, 28. Discoaster diastypus; (7, 8) Sample 198-1208A-36X-2, 99 cm, (9–12, 21, 28) Sample 198-1208A-36X-CC, 1.5 cm. 13, 14. Discoaster lenticularis; (13) Sample 198-1208A-36X-CC, 4 cm, (14) Sample 198-1208A-36X-CC, 12 cm. 15, 16. Discoaster mahmoudii (Sample 198-1208A-36X-CC, 4 cm). 17. Discoaster mediosus (Sample 198-1208A-36X-CC, 4 cm). 18. Discoaster mohleri (Sample 198-1208A-36X-CC, 12 cm). 19, 20, 24–27. Discoaster cf. D. araneus; (19, 24–26) Sample 198-1208A-36X-CC, 12 cm, (20) Sample 198-1208A-36X-CC, 14 cm, (27) Sample 198-1208A-36X-CC, 4 cm. 22. Discoaster lodoensis (Sample 198-1208A-36X-2, 55 cm). 23. Discoaster tanii (Sample 198-1208A-35X-CC). 29, 30. Discoaster multiradiatus (Sample 198-1208A-36X-CC, 1.5 cm). 31. Discoaster mediosus (Sample 198-1208A-36X-CC, 4 cm).