Figure 1. A neighbour-joining tree of COI sequence divergence (K2P) in surveyed species in the family Emballonuridae.

All currently recognized species are supported by bootstrap values ≥97 (1000 replications). Triangles indicate the relative number of individuals sampled (height) and sequence divergence (width). In two cases, Saccopteryx bilineata and Cormura brevirostris (highlighted in red) deep intraspecific mitochondrial lineages are present which are strongly supported indicating the need for additional taxonomic scrutiny. The identification of intraspecific lineages can be hindered by small sample sizes from large geographic areas (e.g. Cyttarops alecto) where divergent sequences may represent independent lineages or poorly sampled intraspecific variation.