The following codes for the islands are used in the checklist (with codes for the archipelagos used if locality citations are unprecise, given in italics, after the name of each archipelago):
| Madeira (Mad) | Azores (Az) | |||
| M | Madeira | S | Santa Maria | |
| D | Desertas | M | Sao Miguel | |
| P | Porto Santo | T | Terceira | |
| S | Savage Islands | G | Graciosa | |
| J | Sao Jorge | |||
| Cape Verde Islands (CV) | P | Pico | ||
| A | Santo Antao | F | Faial | |
| V | Sao Vicente | L | Flores | |
| L | Santa Luzia | C | Corvo | |
| (incl. Ilheu Branco and Ilheu Raso) | ||||
| N | Sao Nicolau | Canary Islands (Can) | ||
| S | Sal | L | Lanzarote | |
| B | Boavista | F | Fuerteventura | |
| M | Maio | C | Gran Canaria | |
| T | Santiago | T | Tenerife | |
| F | Fogo | G | Gomera | |
| R | Brava | H | El Hierro | |
| P | La Palma | |||