Sampling of C. rhombifer and C. acutus, including specific localities within Cuba. Sites within Zapata Swamp (inset) are indicated by black circles, while Birama Swamp is shown with a black star. Sampling localities in Zapata Swamp are as follows: Breeding Farm (BF), Estamento (ES), Maneadero (MN), Punta Arena (PA), Zanja del 9 (Z9), Zanja del 10 (Z10), Zona del Brigadista (ZB), and Zona Novo (ZN).