Belongs within: Dytiscidae.
The Colymbetinae is a clade of diving beetles diagnosed by the presence of transverse rugae on the dorsal surface of the lateral margins of abdominal sternum two, and usually of unequal metatarsal claws in both sexes. The majority of species are included in a tribe Colymbetini, characterised by a female genital system with a separate bursa and vagina, with the bursa copulatrix long, slender and slightly twisted, and a large and broad spermathecal duct attaching near the base of the bursa. A single New Guinean species, Carabdytes upin, is included in a distinct tribe characterised by a lack of lobes on the metatarsomeres and a hydroporine-type genital system (Miller 2001).
<==Colymbetinae | i. s.: Meridiorhantus calidusVB21 | Caperhantus cicuriusVB21 | Bunites distigmaVB21 |--Anisomeria [Anisomeriini]M01 |--Carabdytes Balke, Hendrich & Wewalka 1992 [Carabdytini]M01 | `--*C. upin Balke, Hendrich & Wewalka 1992M01 `--ColymbetiniM01 |--Meladema Laporte 1835 [incl. Scutopterus Dejean 1833 (nom. rej.)]NR97 | `--M. coriaceaM01 `--Rhantus Dejean 1833LM87 [=RantusLM87; incl. Ilybiomorphus Porta 1923RL01, Rantogiton Gozis 1910RL01] | i. s.: R. suturalis (Macleay 1825)LM87 (see below for synonymy) | R. flavicollisG89 | R. impar Guignot 1956LM87 | R. morneri Falkenström 1937LM87 | R. simulans Régimbart 1908LM87 |--R. pseudopacificusM01 `--+--R. calidus Fab. 1792M01, FS90 [incl. R. nubilusFS90, R. taeniolis Say 1825FS90] `--+--+--R. atricolorM01 | |--R. binotatusM03 | |--R. frontalisM01 | |--R. gutticollis Say 1834M01, ZL74 [incl. R. hoppingi Wallis 1933ZL74, R. mexicanusZL74] | |--R. sericansM01 | |--R. signatusM01 | `--Hoperius Fall 1927M01, RL01 | `--H. planatusM01 `--+--+--R. (Nartus Zaitzev 1907)M01, RL01 | | |--R. (N.) grapiiM01 | | `--R. (N.) sinuatusM01, M03 | `--Neoscutopterus Balfour-Browne 1943M03, RL01 [incl. Pseudoscutopterus Hatch 1953RL01] | |--N. angustusM03 | `--N. horniiM01 `--Colymbetes Clairville 1806M03, M01 [incl. Cymatopterus Dejean 1833RL01] |--C. affinisB35 |--C. agilisR26 |--C. aterR26 |--C. biguttatusR26 |--C. brunneusB35 |--C. collarisR26 |--C. decemstriatusB35 |--C. densusM01 |--C. dolabatus [incl. C. drewseni, C. groenlandicus, C. thomsoni]S89 |--C. exaratusM03 |--C. fenestratusR26 |--C. nigerB35 |--C. pacificusB35 |--C. parvulusB35 |--C. paykulliM03 |--C. sculptilisRL01 |--C. striatus (Linnaeus 1758)G20, L58 [=Dytiscus striatusG20] `--C. sturmiiR26
Rhantus suturalis (Macleay 1825)LM87 [=Colymbetes suturalisLM87; incl. R. australis Aubé 1836LM87, C. pulverosus Stephens 1828LM87, *R. suturalis pulverosusLM87, BP00, R. suturalis var. virgulatusC01]
*Type species of generic name indicated
References
[BP00] Bellini, R., F. Pederzani, R. Pilani, R. Veronesi & S. Maini. 2000. Hydroglyphus pusillus (Fabricius) (Coleoptera Dytiscidae): its role as a mosquito larvae predator in rice fields. Boll. Ist. Ent. “G. Grandi” Univ. Bologna 54: 155–163.
[B35] Boisduval, J. B. 1835. Voyage de Découvertes de l’Astrolabe. Exécuté par ordre du Roi, pendant les années 1826–1827–1828–1829, sous le commandement de M. J. Dumont d’Urville. Faune entomologique de l’océan Pacifique, avec l’illustration des insectes nouveaux recueillis pendant le voyage vol. 2. Coléoptères et autres ordres. J. Tastu: Paris.
[C01] Csiki, E. 1901. Bogarak [Coleopteren]. 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. 75–120. Victor Hornyánszky: Budapest, and Karl W. Hierseman: Leipzig.
[FS90] Fleutiaux, E., & A. Sallé. 1890. Liste des coléoptères de la Guadeloupe et descriptions d’espèces nouvelles. Annales de la Société Entomologique de France, 6e série 9: 351–484.
[G89] Gestro, R. 1889. Viaggio ab Assab nel Mar Rosso dei signori G. Doria ed O. Beccari con il R. Avviso “Esploratore” dal 16 Novembre 1879 al 26 Febbraio 1880.—IV. Coleotteri. Annali del Museo Civico di Storia Naturale di Genova, Serie 2a, 7: 5–72.
[G20] Goldfuss, G. A. 1820. Handbuch der Naturgeschichte vol. 3. Handbuch der Zoologie pt 1. Johann Leonhard Schrag: Nürnberg.
[LM87] Lawrence, J. F., B. P. Moore, J. E. Pyke & T. A. Weir. 1987. Zoological Catalogue of Australia vol. 4. Coleoptera: Archostemata, Myxophaga and Adephaga. Australian Government Publishing Service: Canberra.
[L58] Linnaeus, C. 1758. Systema Naturae per Regna Tria Naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata. Laurentii Salvii: Holmiae.
[M01] Miller, K. B. 2001. On the phylogeny of the Dytiscidae (Insecta: Coleoptera) with emphasis on the morphology of the female reproductive system. Insect Systematics and Evolution 32: 45–92.
[M03] Miller, K. B. 2003. The phylogeny of diving beetles (Coleoptera: Dytiscidae) and the evolution of sexual conflict. Biological Journal of the Linnaean Society 79: 359–388.
[NR97] Nilsson, A. N., & R. E. Roughley. 1997. The genus- and family-group names of the Dytiscidae—additions and corrections. Beiträge zur Entomologie 47 (2): 359–364.
[R26] Risso, A. 1826. Histoire naturelle des principales productions de l’Europe méridionale et particulièrement de celles des environs de Nice et des Alpes maritimes vol. 5. F.-G. Levrault: Paris.
[RL01] Roughley, R. E., & D. J. Larson. 2001. Dytiscidae Leach, 1815. In: Arnett, R. H., Jr & M. C. Thomas (eds) American Beetles vol. 1. Archostemata, Myxophaga, Adephaga, Polyphaga: Staphyliniformia pp. 156–186. CRC Press: Boca Raton.
[S89] Sénac, M. 1889. Une espèce rare de dyticides, le Colymbetes groenlandicus. Annales de la Société Entomologique de France, 6e série 9: xvii–xix.
[VB21] Vasilikopoulos, A., M. Balke, S. Kukowka, J. M. Pflug, S. Martin, K. Meusemann, L. Hendrich, C. Mayer, D. R. Maddison, O. Niehuis, R. G. Beutel & B. Misof. 2021. Phylogenomic analyses clarify the pattern of evolution of Adephaga (Coleoptera) and highlight phylogenetic artefacts due to model misspecification and excessive data trimming. Systematic Entomology 46: 991–1018.
[ZL74] Zimmerman, J. R., & J. A. Ludwig. 1974. Multiple-discriminant analysis of geographical variation in the aquatic beetle, Rhantus gutticollis (Say) (Dytiscidae). Systematic Zoology 24 (1): 63–71.