| Species (N=5) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 43.5 | 56.5 | 3556 | 1393 | 2987 | 3445 | 73.1 |
| Alligator sinensis | 46.6 | 53.4 | 3750 | 1561 | 2881 | 3197 | 60.7 |
| Caiman crocodilus | 44.4 | 55.6 | 3782 | 1264 | 2762 | 3552 | 24.1 |
| Paleosuchus palpebrosus | 47.9 | 52.1 | 4035 | 1394 | 2547 | 3368 | 24.1 |
| Paleosuchus trigonatus | 47.9 | 52.1 | 4070 | 1368 | 2528 | 3381 | 30.9 |