Belongs within: Panheteroptera.
The Naucoroidea are a group of aquatic, predatory bugs with raptorial forelegs, spinose mid and hind tibiae, and lacking veins in the membrane of the hemelytron (if present) (Carver et al. 1991). Most breathe when submerged by carrying a bubble of air between the wings and the dorsum of the abdomen though members of the Aphelocheiridae are capable of plastron respiration (Richards & Davies 1977).
Characters (from Richards & Davies 1977, as Naucoridae): Small or medium, broadly oval, flattened insects; antennae four-segmented, simple; rostrum strong, three-segmented; membrane without veins; coxae hinged; fore legs usually strongly raptorial; hind legs fringed with swimming-hairs.
<==NaucoroideaSP02 | i. s.: SchizopteryxS02 |--TriassocoridaeSP02 |--Potamocoridae [Potamocorinae]GE05 |--Aphelocheiridae [Aphelocheirinae]SP02 | |--Coreoidus latusSP02 | `--AphelocheirusCGW91 | |--A. australicusCGW91 | `--A. kawamurae Matsumura 1915I92 `--Naucoridae [Apopnidae, Atopositidae]GE05 | i. s.: MongonectaS02 | AidiumGE05 | AngaronectaGE05 | HeleonaucorisGE05 | LiadonaucorisGE05 | NectodesGE05 | NectonaucorisGE05 | Scaphocoris [Scaphocoridae]GE05 | Aphlebocoris [Aphlebocoridae]GE05 | ApopnusGE05 | ScaphodemopsisGE05 | CantaeronectaGE05 | IlyocorisRD77 |--AmbrysinaeCGW91 |--LimnocorinaeCGW91 |--CryphocricinaeCGW91 |--CheirochelaRD77 [CheirochelinaeCGW91] |--LaccocorisJG19 [LaccocorinaeCGW91] | `--L. montandoni Izzard 1936JG19 `--Naucoris [Naucorinae]CGW91 |--N. cimicoidesH01 |--N. congrexCGW91 |--N. maculata [=N. maculatus; incl. N. aptera]L49 `--N. subaureusPH10
*Type species of generic name indicated
References
[CGW91] Carver, M., G. F. Gross & T. E. Woodward. 1991. Hemiptera (bugs, leafhoppers, cicadas, aphids, scale insects etc.) In: CSIRO. The Insects of Australia: A textbook for students and research workers 2nd ed. vol. 1 pp. 429–509. Melbourne University Press: Carlton (Victoria).
[GE05] Grimaldi, D., & M. S. Engel. 2005. Evolution of the Insects. Cambridge University Press: New York.
[H01] Horváth, G. 1901. Hemipterák [Hemiptera]. In: Horváth, G. (ed.) Zichy Jenő Gróf Harmadik Ázsiai Utazása [Dritte Asiatische Forschungsreise des Grafen Eugen Zichy] vol. 2. Zichy Jenő Gróf Harmadik Ázsiai Utazásának Állattani Eredményei [Zoologische Ergebnisse der Dritten Asiatischen Forschungsreise des Grafen Eugen Zichy] pp. 245–274. Victor Hornyánszky: Budapest, and Karl W. Hierseman: Leipzig.
[I92] Iwahashi, J. (ed.) 1992. Reddo Deeta Animaruzu: a pictorial of Japanese fauna facing extinction. JICC: Tokyo.
[JG1] James, D. J., P. T. Green, W. F. Humphreys & J. C. Z. Woinarski. 2019. Endemic species of Christmas Island, Indian Ocean. Records of the Western Australian Museum 34 (2): 55–114.
[L49] Lucas, H. 1849. Exploration Scientifique de l’Algérie pendant les années 1840, 1841, 1842 publiée par ordre du gouvernement et avec le concours d’une commission académique. Sciences physiques. Zoologie. II. Histoire naturelle des animaux articulés. Troisième partie. Insectes (suite). Imprimerie Nationale: Paris.
[PH10] Pinder, A. M., S. A. Halse, R. J. Shiel & J. M. McRae. 2010. An arid zone awash with diversity: patterns in the distribution of aquatic invertebrates in the Pilbara region of Western Australia. Records of the Western Australian Museum Supplement 78 (1): 205–246.
[RD77] Richards, O. W., & R. G. Davies. 1977. Imms’ General Textbook of Entomology 10th ed. vol. 2. Classification and Biology. Chapman and Hall: London.
[SP02] Shcherbakov, D. E., & Yu. A. Popov. 2002. Superorder Cimicidea Laicharting, 1781: Order Hemiptera Linné, 1758. The bugs, cicadas, plantlice, scale insects, etc. [=Cimicida Laicharting, 1781, =Homoptera Leach, 1815+Heteroptera Latreille, 1810). In: Rasnitsyn, A. P., & D. L. J. Quicke (eds) History of Insects pp. 143–157. Kluwer Academic Publishers: Dordrecht.
[S02] Sinitshenkova, N. D. 2002. Ecological history of the aquatic insects. In: Rasnitsyn, A. P., & D. L. J. Quicke (eds) History of Insects pp. 388–426. Kluwer Academic Publishers: Dordrecht.