Plate 5. 1-3, 5-9. Conusphaera sinespina sp. nov. (1) Distal view, Sample 149-901A-5R-1, 31 cm; FSU-F111, X8000. (2, 5, 6)^TR. Same specimen, Sample 149-901A-5R-1, 31 cm. (2) Distal view, FSU-F54, X10000. (5, 6) XP, FSU-FO51-D11 and Ph, FSU-FO51-D14. (3, 9) Holotype, same specimen, Sample 149-901A-5R-1, 31 cm. (3) Distal view, FSU-F74, X12,000. (9) Oblique distal view, FSU-F77, X12,000. (7, 8) Sample 149-901A-3R-1, 2 cm; XP, FSU-FO41-D6 and Ph, FSU-FO41-D7. 4, 10. Conusphaera mexicana Trejo ssp. minor Bralower ex Cooper, same specimen, Sample 149-901A-5R-1, 31 cm. (4) Distal view, FSU-F12, X8000. (10) Oblique distal view, FSU-F13, X8000. 11-17. Broken spine of Conusphaera mexicana Trejo ssp. minor Bralower ex Bown and Cooper, Sample 149-901A-5R-1, 31 cm. ( 11, 12, 17)^TR. Same specimen. (11) Oblique proximal view, FSU-F92, X8000. ( 12) Proximal view, FSU-F89, X8000. (17) XP, FSU-F052-D44. (13-16)^TR. Same specimen. (13, 14) XP, FSU-FO52-D41 and Ph, FSU-FO52-D42. (15) Proximal view, FSU-F90, X8000. (16) Oblique proximal view, FSU-F84, X8000.