| Answer | Crossword Clue |
|---|---|
| fusulinids | FUSULINID, any of a family of extinct marine foraminifera |
| fusulinid | any of a family of extinct marine foraminifera |
| plesiosaur | any of a group of extinct marine reptiles of Mesozoic times |
| plesiosaurs | PLESIOSAUR, any of a group of extinct marine reptiles of Mesozoic times |
| trilobite | any marine arthropod of the extinct class Trilobita, from the Paleozoic Era, having a flattened, oval body varying in length from 1 in. (2.5 cm) or less to 2 ft. (61 cm) |
