Kiwa puravida (Fig. 2H I) and Aegla cholchol (Fig. 2H II) possess a carapace slightly longer than it is broad, while Lomis hirta (Fig. 2H III) possesses a more rounded carapace which is slightly broader than it is long (proportions illustrated in Fig. 2H). Overall, the dorsal aspect of the body in all three taxa is fairly oval since the pleon is bent under the cephalothorax (Fig. 2D-F), though not to the same degree: in A. cholchol (Fig. 2H II), the first to fourth pleonal segments are visible, while in K. puravida (Fig. 2H I) and L. hirta (Fig. 2H III), only the first and second pleonal segments are visible. The pleurotergites in L. hirta (Fig. 3F) are less convexly bent than in K. puravida (Fig. 3E) and A. cholchol (Fig. 3D) and the second pleonal segment in L. hirta is markedly longer than the subsequent ones (Fig. 4G). In K. puravida and A. cholchol, the third to seventh thoracic sternites are confluent to form a sternal plate, or plastron (Fig. 2D-G). In L. hirta, the plastron is formed by the fourth to seventh thoracic sternites, while the third thoracic sternites (arrow, Fig. 2G) are set off from the plastron and dorsally bent. The eighth thoracic sternites in all three species are distinctly separate from the plastron (Fig. 5E). In A. cholchol (Fig. 2D), the plastron has an almost straight posterior margin, while that in K. puravida (Fig. 2E) and L. hirta (Fig. 2G) displays a markedly triangular emargination. In L. hirta, the plastron is partly (male; Fig. 2F) or completely (female; Suppl.-Fig. S2) covered by the bent pleon, while it remains uncovered in K. puravida (Fig. 2E) and A. cholchol (Fig. 2D).