| Species (N=18) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) | 
|---|---|---|---|---|---|---|---|
| Alligator mississippiensis | 44.3 | 55.7 | 296 | 132 | 269 | 269 | 73.1 | 
| Alligator sinensis | 47.0 | 53.0 | 315 | 139 | 253 | 259 | 60.7 | 
| Caiman crocodilus | 43.5 | 56.5 | 300 | 120 | 254 | 292 | 24.1 | 
| Crocodylus acutus | 43.9 | 56.1 | 279 | 144 | 265 | 275 | 32.9 | 
| Crocodylus intermedius | 45.0 | 55.0 | 282 | 151 | 262 | 268 | 21.8 | 
| Crocodylus moreletii | 44.8 | 55.2 | 284 | 147 | 261 | 271 | 25.4 | 
| Crocodylus niloticus | 45.5 | 54.5 | 292 | 146 | 259 | 266 | 43.8 | 
| Crocodylus novaeguineae | 47.0 | 53.0 | 293 | 160 | 257 | 253 | 24.6 | 
| Crocodylus palustris | 46.1 | 53.9 | 293 | 151 | 256 | 263 | 31.5 | 
| Crocodylus porosus | 44.9 | 55.1 | 285 | 147 | 260 | 271 | 41.7 | 
| Crocodylus rhombifer | 45.1 | 54.9 | 285 | 149 | 263 | 266 | 38.2 | 
| Crocodylus siamensis | 44.9 | 55.1 | 285 | 147 | 261 | 270 | 21.9 | 
| Gavialis gangeticus | 42.5 | 57.5 | 277 | 132 | 277 | 277 | 28.8 | 
| Mecistops cataphractus | 42.9 | 57.1 | 269 | 144 | 270 | 280 | 56.1 | 
| Osteolaemus tetraspis | 40.5 | 59.5 | 248 | 142 | 288 | 285 | 70.0 | 
| Paleosuchus palpebrosus | 49.6 | 50.4 | 348 | 131 | 233 | 254 | 24.1 | 
| Paleosuchus trigonatus | 48.3 | 51.7 | 340 | 127 | 238 | 261 | 30.9 | 
| Tomistoma schlegelii | 40.9 | 59.1 | 265 | 129 | 285 | 284 | 24.7 |