Larva of Berosus, from here.

Belongs within: Staphyliniformia.
Contains: Chaetarthriini.

The Hydrophilidae are a group of beetles in which the majority of species are aquatic, though there are also terrestrial representatives. Distinctive features of the Hydrophilidae include antennae with a three-segmented club preceded by a small cup-like segment or cupule. Larvae are phytophagous or saprophagous, but the adults are predators (Lawrence & Britton 1991).

Characters (from Lawrence & Britton 1991): Antennae usually short, 7- to 9-segmented, with 3-segmented pubescent club preceded by glabrous cup-like segment (cupule); clypeus large, frontoclypeal suture more or less angulate, often attached to median line (endocarina); maxillary palps well developed, usually longer than antennae. Larvae with six stemmata on each side, usually possessing metapneustic respiratory system with only eighth spiracles function and located in respiratory chamber (atrium) at end of abdomen.

    |--Amphiopinae LB91
    |--Epimetopus [Epimetopidae, Epimetopinae] B14
    |    `--E. lanceolatus Perkins 2012 B14
    |--Hydrochus [Hydrochidae, Hydrochinae] LB91
    |    |--H. chubu Balfour-Browne & Satô 1962 I92
    |    `--H. serricollis LB91
    |--Chaetarthriinae B14
    |    |--Chaetarthriini M74
    |    `--Horelophus [Anacaenini, Horelophinae] B14
    |         `--H. walkeri Orchymont 1913 B14
    |--Hydrobiinae LB91
    |    |--Hydrobius Leach 1815 [Hydrobiusina] BR05
    |    |--Helochares australis LB91
    |    `--Troglochares Spangler 1981 S86
    |         `--T. ashmolei Spangler 1981 S86
    |--Berosus [Berosinae] LB91
    |    |--B. approximans TDC06
    |    |--B. australiae TDC06
    |    |--B. dispar C01
    |    |--B. macumbensis TDC06
    |    |--B. metalliceps M74
    |    |--B. munitipennis TDC06
    |    `--B. nutans TDC06
    |--Sphaeridiinae B14
    |    |--Notocercyon LB91
    |    |--Pseudohydrobius LB91
    |    |    |--P. flavus Lea 1919 L19
    |    |    `--P. floricola L19
    |    |--Cercyon LB91
    |    |    |--C. analis (Paykull 1798) E02
    |    |    |--C. haemorrhoidalis C01
    |    |    `--C. quisiquilius [incl. C. quisiquilius var. scutellare] C01
    |    `--Sphaeridium B14
    |         |--S. bipustulatum [incl. S. bipustulatum var. quadrimaculatum] C01
    |         |--S. dimidiatum B70
    |         |--S. discolor LB91
    |         `--S. scarabaeoides (Linnaeus 1758) B14
    `--Hydrophilini [Hydrophilinae] BB68
         |--Tropisternus B14
         |    |--T. collaris (Fabricius 1775) B14
         |    `--T. lateralis BB68
         |--Hydrochara BB68
         |    |--H. affinis HN13
         |    `--H. obtusatus BB68
         `--Hydrophilus E12
              |--H. albipes B70
              |--H. aterrimus B14
              |--H. brevispina TDC06
              |--H. griseus L02
              |--H. inermis Lucas 1847 E12
              |--H. latipalpus LB91
              |--H. pedipalpus ZS10
              |--H. piceus Linnaeus 1758 B14
              `--H. triangularis BB68

Hydrophilidae incertae sedis:
  Limnoxenus zealandicus (Broun 1880) E02
  Zetemnes tarsalis P02
  Angarolarva aquatica P02
  Hydrobiites S02
  Cretotaenia S02
  Hydrophilopsia S02
  Rygmodus H82
    |--R. modestus T27
    `--R. tibialis Broun 1893 H82
  Coelostoma fabrieii P05
  Hydrobiomorpha ZS10
  Oosternum Sharp 1882 S62
    |--O. attacomis Spangler 1962 S62
    |--O. costatum S62
    `--O. pubescens S62
  Philydrus testaceus C01 [=Hydrophilus testaceus G89; incl. P. testaceus var. lineatus C01]
  Laccobius nigriceps [incl. L. nigriceps var. maculiceps] C01
  Cryptopleurum atomarium C01
  Enochrus maculiceps MC13, TDC06
  Andotypus MW15
  Dactylosternum Z93
    |--D. abdominale Z93
    `--D. hydrophiloides Z93
  Sternolophus B70
    |--S. immariginatus PH10
    `--S. marginicollis B70

*Type species of generic name indicated


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[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.

[H82] Helmore, D. W. 1982. Drawings of New Zealand insects. Bulletin of the Entomological Society of New Zealand 8: 1–52.

[HN13] Huang, D., A. Nel, C. Cai, Q. Lin & M. S. Engel. 2013. Amphibious flies and paedomorphism in the Jurassic period. Nature 495: 94–97.

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[L02] Latreille, P. A. 1802. Histoire Naturelle, générale et particulière des crustacés et des insectes vol. 3. Familles naturelles des genres. F. Dufart: Paris.

[LB91] Lawrence, J. F., & E. B. Britton. 1991. Coleoptera (beetles). In: CSIRO. The Insects of Australia: A textbook for students and research workers vol. 2 pp. 543–683. Melbourne University Press: Carlton (Victoria).

[L19] Lea, A. M. 1919. Notes on some miscellaneous Coleoptera with descriptions of new species.—Part V. Transactions of the Royal Society of South Australia 43: 166–261, pls 25–27.

[MC13] Majer, J. D., S. K. Callan, K. Edwards, N. R. Gunawardene & C. K. Taylor. 2013. Baseline survey of the terrestrial invertebrate fauna of Barrow Island. Records of the Western Australian Museum Supplement 83: 13–112.

[MW15] McKenna, D. D., A. L. Wild, K. Kanda, C. L. Bellamy, R. G. Beutel, M. S. Caterino, C. W. Farnum, D. C. Hawks, M. A. Ivie, M. L. Jameson, R. A. B. Leschen, A. E. Marvaldi, J. V. McHugh, A. F. Newton, J. A. Robertson, M. K. Thayer, M. F. Whiting, J. F. Lawrence, A. Ślipiński, D. R. Maddison & B. D. Farrell. 2015. The beetle tree of life reveals that Coleoptera survived end-Permian mass extinction to diversify during the Cretaceous terrestrial revolution. Systematic Entomology 40 (4): 835–880.

[M74] Miller, D. C. 1974. Revision of the New World Chaetarthria (Coleoptera: Hydrophilidae). Entomologica Americana 49 (1): 1–123.

[P05] Pinder, A. M. 2005. A review of biodiversity in wetlands with organic sediments on the Swan Coastal Plain, Western Australia, with an emphasis on aquatic invertebrates. Journal of the Royal Society of Western Australia 88 (3): 129–132.

[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.

[P02] Ponomarenko, A. G. 2002. Superorder Scarabaeidea Laicharting, 1781. Order Coleoptera Linné, 1758. The beetles. In: Rasnitsyn, A. P., & D. L. J. Quicke (eds) History of Insects pp. 164–176. 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.

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[TDC06] Timms, B. V., B. Datson & M. Coleman. 2006. The wetlands of the Lake Carey catchment, northeast Goldfields of Western Australia, with special reference to large branchiopods. Journal of the Royal Society of Western Australia 89 (4): 175–183.

[ZS10] Zborowski, P. & R. Storey. 2010. A Field Guide to Insects in Australia 3rd ed. Reed New Holland: Sydney.

[Z93] Zimmerman, E. C. 1993. Australian Weevils (Coleoptera: Curculionoidea) vol. 3. Nanophyidae, Rhynchophoridae, Erirhinidae, Curculionidae: Amycterinae, literature consulted. CSIRO Australia.

Last updated: 25 May 2017.

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