FIGURES 179–190 in A comparison of external and internal maxilla and mandible morphology of water bugs (Hemiptera: Heteroptera: Nepomorpha)

FIGURES 179–190. The shapes of the apices of the maxillae, the shape of the mandibular file, and the shape of the rupturing device on the maxillae in the Naucoridae: Cheirochelinae; 179 –180. Coptocatus oblongulus, 179. The apex of the right maxilla is narrow, the left apex is wide, row of dorsal bristles (brdex), (rupturing device); 180. The narrow, lancet-shaped apex of the right maxilla, ventral bristles (brvex) on the maxillae are visible; 181–182. Coptocatus kinabalu, 181. The apex of the right maxilla is narrow, the left apex is wide, row of dorsal internal spines (spvin) and external bristles (brdex) (rupturing device); 182. The apex of the right maxilla is straight, the left is wide and curved, two rows of bristles (brvex) and spines (spvin) are visible; 183. Tanycricos longiceps, the apex of the right maxilla is straight, and that of the left one is curved and wide, mandibular file with ten blunt pegs (bp) and two long spines (spl); Cryphocricinae; 184 –186. Cryphocricos hungerfordi, 184. The apices of the left and right maxilla are straight (lancet-shaped), on the right maxilla a row with bristles (brvex) is visible; 185. The ventral rupturing device (brvex) and a row of dorsal bristles (brdex) are exposed, the apices of the right and left maxilla are straight; 186. The left mandibular file, from the tip there spread seven blunt pegs (bp) and five long spines (spl) forming a collar; 187–190. Ambrysus occidentalis, 187. The right mandibular file has eight blunt pegs (bp) and nine long spines (spl); 188. The apex of the left maxilla is lancet-shaped; 189. The rupturing device (brvex and spvin) is visible; 190. The inner view of the right maxilla, internal edges are equipped with spines (spidin, spvin), a food canal (FC) is visible.