Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Maximum total lengths of spiny-cheek crayfish in Polish and other waters
| Locality | Maximum length (mm) | Author |
|---|---|---|
| Vistula Lagoon (Poland) | 118.0 | Author’s own study |
| Lakes in Pomerania (Poland) | 109.5 | Śmietana 2013 |
| Lakes in Western Pomerania (Poland) | 100.2 | Śmietana 2008 |
| Lakes in Warmia (Poland) | 110.0 | Kossakowski 1966 |
| Lake Pobłędzie (northern Poland) | 107.0 | Krzywosz et al. 2006 |
| Poland | 121 | Chybowski 2000 |
| lentic waters (Czech Republic) | 116.5 | Ďuriš et al. 2006 |
| Central lakes (Germany) | 107.0 | Lieder 1959, after Śmietana 2013 |
| North-eastern lakes (Germany) | 110.0 | Pieplow 1938 |
| Delaware River (USA) | 110.0 | Holdich & Black 2007 |
| Lakes in New England (USA) | 109.0 | Momot 1984 |