Spatial distribution of Collembola populations. (a) Pseudachorutinae n. sp., (b) Acanthanura n. sp. Populations were identified a posteriori on the basis of six-locus genotype clustering (supplemented by phylogenetic analysis of mtDNA). HCR, Harolds Cross Region; ESR, Eastern Slopes Region; AR, Anembo Region; PSR, Pikes Saddle Region; BR, Badja Region. For a description of physical landscape features and the likely palaeoclimatic history of Tallaganda, see Garrick et al. .