FIGURES 13–18 in Two new chironomid species of the genus Pseudokiefferiella Zavřel (Diptera: Chironomidae: Diamesinae) from the Amur River basin of Russia

FIGURES 13–18. Fourth instar larva of Pseudokiefferiella matafonovi sp. nov. 13, mentum; 14, mandible; 15, antenna; 16, distal part of premandible; 17, anal segments in dorsal view; 18, anal segments in lateral view. SaS – supraanal setae. Scale bars: Fig. 4 – 50 μm; Figs. 15–16 – 20 μm.