Sampling codes and classification schemes.

Sampling codes for 18 Pristionchus pacificus populations on La Réunion Island, and their classification by altitude, ecozone, beetle host, genetic cluster and genetic lineage. Although several significant altitude combinations were tested, final altitude group designations correspond to: (1) <100 m; (2) 500–800 m; (3) 900–1,200 m; (4) 1,300–1,600 m; (5) 2,000–2,300 m; Beetle host codes correspond to: Ado: Adoretus sp.; Am: Amneidus godefroyi; Aph: Aphodius sp.; Ata: Ataenius sp.; Chr: Chrysomelidae sp.; Hch: Hoplochelus marginalis; Hop: Hoplia retusa; Mal: Maladera affinis; Ory: Oryctes borbonicus; Genetic cluster designation based on the 12 genetic clusters identified using STR data in the program INSTRUCT. See also Figure 1.