Hydraenidae
| Hydraenidae Temporal range:
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Coleoptera |
| Suborder: | Polyphaga |
| Infraorder: | Staphyliniformia |
| Superfamily: | Staphylinoidea |
| Family: | Hydraenidae Mulsant, 1844 |
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Hydraenidae is a family of very small aquatic beetles, sometimes called "minute moss beetles", with a worldwide distribution. These beetles are generally 1–3 mm in length (although some species reach 7 mm) with clubbed antennae. They do not swim well and are generally found crawling in marginal vegetation. Most are phytophagous but a few saprophagous and predatory species are known.
The family consists of more than 2000 species belonging to over 50 genera. Genus Hydraena alone includes nearly 900 described species worldwide.
The beetles are semi-aquatic, riparian and can walk on water surface. They feed on algae, bacteria, protozoans and detritus on wet stones and plant matter.
The larvae, although preferring damp habitats near water, are non-aquatic and tend to drown easily. They have a distinct labrum and well developed galea of maxillae. 9th abdominal tergum has a pair of apical, re-curved ventral hook and 2-segmented urogomphi.[1][2]
Genera
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These 56 genera belong to the family Hydraenidae:[3][4][5]
- Adelphydraena Perkins, 1989
- Archaeodraena Jäch & Yamamoto, 2017
- Aulacochthebius Kuwert, 1887
- Calobius Wollaston, 1854
- Cobalius Rey, 1886
- Coelometopon Janssens, 1972
- Davidraena Jäch, 1994
- Decarthrocerus Orchymont, 1948
- Discozantaena Perkins & Balfour-Browne, 1994
- Edaphobates Jäch & Díaz, 2003-01
- Enicocerus Stephens, 1829
- Ginkgoscia Jäch & Díaz, 2004-01
- Gondraena Jäch, 1994
- Gymnanthelius Perkins, 1997
- Gymnochthebius Orchymont, 1943
- Haptaenida Perkins, 1997
- Heptaenida Perkins, 1997
- Homalaena Ordish, 1984
- Hughleechia Perkins, 1981
- Hydraena Kugelann, 1794
- Hydraenida Germain, 1901
- Hydroenida Germain, 1901
- Hymenodes Mulsant, 1844
- Laeliaena Sahlberg, 1900
- Limnebius Leach, 1815
- Madagaster Perkins, 1997
- Menomadraena Perkins, 2017
- Meropathus Enderlein, 1901
- Micragasma Sahlberg, 1900
- Neochthebius Orchymont, 1932
- Nucleotops Perkins & Balfour-Browne, 1994
- Ochtebiites Ponomarenko, 1977
- Ochthebius Leach, 1815
- Ochtheosus Perkins, 1997
- Oomtelecopon Perkins, 2005
- Orchymontia Broun, 1919
- Parasthetops Perkins & Balfour-Browne, 1994-31
- Parhydraena Orchymont, 1937
- Parhydraenopsis Perkins, 2009-16
- Phothydraena Kuwert, 1888
- Pneuminion Perkins, 1997
- Podaena Ordish, 1984
- Prionochthebius Kuwert, 1887
- Prosthetops Waterhouse, 1879
- Protochthebius Perkins, 1997
- Protosthetops Perkins, 1994
- Protozantaena Perkins, 1997
- Pterosthetops Perkins, 1994
- Sebasthetops Jäch, 1998-01
- Sicilicula Balfour-Browne, 1958
- Spanglerina Perkins, 1980
- Trinomadraena Perkins, 2017
- Tympallopatrum Perkins, 1997
- Mesoceration Janssens, 1967
- Parhydraenida Balfour-Browne, 1975
- Tympanogaster Janssens, 1967
Extinct genera
- †Archaeodraena Jäch and Yamamoto 2017, Burmese amber, Myanmar, Cenomanian
- †Ochtebiites Ponomarenko 1977 Abasheva Formation, Russia, Pliensbachian, Ichetuy Formation, Russia, Oxfordian, Karabastau Formation, Kazakhstan, Oxfordian, Mogotuin Formation, Mongolia, Aptian
References
- ^ Hydraenidae, Lucid Central.
- ^ L. Watson and M.J. Dallwitz. Hydraenidae, Insects of Britain and Ireland: the families of Coleoptera. Version: 7 October 2018.
- ^
Bouchard, Patrice; Bousquet, Yves; Davies, Anthony E.; Alonso-Zarazaga, Miguel A.; et al. (2011). "Family-group names in Coleoptera (Insecta)". ZooKeys (88): 1–972. doi:10.3897/zookeys.88.807. ISSN 1313-2989. PMC 3088472. PMID 21594053.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ "Hydraenidae". GBIF. Retrieved 16 June 2019.
- ^ "Hydraenidae Report". Integrated Taxonomic Information System. Retrieved 16 June 2019.
External links
Data related to Hydraenidae at Wikispecies- Hydraenidae, Identification and Ecology of Australian Freshwater Invertebrates.
- Hydraenidae at Tolweb