Reciprocally monophyletic groups possibly indicating unrecognized species. eighbor-joining tree constructed with K2P genetic distances. Fixed substitutions are represented by coloured boxes, with corresponding character positions relative to the beginning of COI. a) Little Penguin (Eudyptula minor); b) Common Redshank (Tringa totanus) and, c) Gentoo Penguin (Pygoscelis papua).
Tavares and Baker BMC Evolutionary Biology 2008 8:81 doi:10.1186/1471-2148-8-81