Fig. 8 in Phylogenetic reconstruction based on COI reshuffles the taxonomy of hyalosphenid shelled (testate) amoebae and reveals the convoluted evolution of shell plate shapes

Fig. 8. Scanning electron micrographs illustrating morphological variations within the Quadrulella cf. symmetrica morphospecies. (a) Q. cf. symmetrica_BG from Bulgaria; (b) Q. cf. symmetrica_CA from Canada; (c) Q. cf. symmetrica_CH from Switzerland; (d) Q. variabilis with a long neck (ex: Q. longicollis) from Bulgaria. Scale bars = 20 µm. Image from Kosakyan et al. (2012) with permission from the editor.