SEM photographs of the planktic foraminiferal index species and some other relevant species from the Maastrichtian and Danian. Samples K and SZ numbered in cm from the KPB. 1. Abathomphalus mayaroensis (SZ-350); 2. Pseudoguembelina hariaensis (SZ-1550); 3. Globotruncana arca (K-1200); 4. Plummerita hantkeninoides (sample K-400); 5. Racemiguembelina fructicosa (K-400); 6. Guembelitria cretacea (K-100); 7. Pseudocaucasina antecessor (K+70); 8. Chiloguembelitria danica (SZ+1); 9. Palaeoglobigerina alticonusa (K+450); 10. Parvularugoglobigerina longiapertura (K+100); 11. Parvularugoglobigerina eugubina (K+200); 12. Trochoguembelitria liuae (K+850); 13. Eoglobigerina simplicissima (sample K+550); 14. Parasubbotina pseudobulloides (K+1110); 15. Woodringina hornerstownensis (K+650); 16. Subbotina triloculinoides (SZ+30); 17. Globanomalina compressa (SZ+445). Scale bar: 100 μm.