Hydrophilidae - Water Scavenger Beetles

The information contained on this list is tentative, based on few observations of museum specimens (currently being assessed) and a limited literature search (Downie and Arnett 1996, Willson 1970). Species of Sphaeridiinae, including those in the genera Cercyon, Cryptopleurum, Paraceryon, Pemelus, Phaenonotum, Sphaeridium, and Tectosternum are not aquatic, but associated with decaying plant or fungal matter, and animal dung, and are only rarely (or incidentally) collected in aquatic systems. Consult Downie and Arnett (1996) for more information.

Anacaena Thomson, 1859 (Subfamily Hydrobiinae)

Anacaena lutescens Stephens, 1829 - (as A. limbata (Fabricius), see Hilsenhoff 1995), UMMZ-Insect Division

Berosus Leach, 1817 (Subfamily Berosinae)

Berosus aculeatus LeConte, 1855 - Downie and Arnett 1996
Berosus fraternus LeConte, 1855 - Downie and Arnett 1996, NMNH (web page database)
Berosus hatchi Miller, 1965 - ON, WI
Berosus infuscatus LeConte, 1855 - Charity Island (44.030°N, 83.437°W), specimens in UMMZ-Insect Collection, NMNH (web page database)
Berosus ordinatus LeConte - IN, MN (and eastward)
Berosus pantherinus LeConte, 1855 - IL, IN, OH, ON, WI
Berosus peregrinus (Herbst), 1797 Hydrophilus - UMMZ-Insect Division
Berosus striatus (Say), 1825 Hydrophilus - UMMZ-Insect Division, NMNH (web page database)
Berosus stylifer Horn, 1873 - WI

Chaetarthria Stephens, 1833 (Subfamily Chaetarthriinae)

Chaetarthria atra (LeConte), 1863 Cyllidium - IL, IN
Chaetarthria pallida (LeConte), 1861 Cyllidium - Cheboygan Co.,UMMZ-Insect Division, NMNH (web page database)

Crenitis Bedel, 1881 (Subfamily Hydrobiinae)

Crenitis digesta (LeConte), 1855 Hydrobius - ON, WI
  • Paracymus digestus; Winters, 1926
  • Crenophilus digestus; d'Orchymont, 1942

Cymbiodyta Bedel, 1881 (Subfamily Hydrobiinae)

Cymbiodyta acuminata Fall, 1924 - UMMZ-Insect Division
Cymbiodyta blanchardi Horn, 1890 - UMMZ-Insect Division
Cymbiodyta chamberlaini Smetana, 1974 - UMMZ-Insect Division
Cymbiodyta minima Notman, 1919 - UMMZ-Insect Division, NMNH (web page database)
  • ?Hydrobius marginellus Kirby, 1837, in Richardson
  • Philidrus lacustris Horn, 1873
  • Cymbiodyta lacustris Wickham, 1895
  • Cymbiodyta acuminata Hatch, 1933 (misid).
Cymbiodyta semistriata (Zimmermann), 1869 Philhydrus - UMMZ-Insect Division, NMNH (web page database)
  • Philhydrus fimbriatus LeConte, 1855
  • Philidrus fimbriatus Provancher, 1877
Cymbiodyta toddi Spangler, 1966 - Downie and Arnett 1996
Cymbiodyta vindicata Fall, 1924 - UMMZ-Insect Division, NMNH (web page database)

Dibolocelus Bedel, 1892 (Subfamily Hydrophilinae)

Dibolocelus ovatus (Gemminger and Harold), 1868 Hydrophilus - Willson 1970

Enochrus Thomson, 1859 (Subfamily Hydrobiinae)

Enochrus (Methydrus) blatchleyi (Fall), 1924 Philhydrus - Downie and Arnett 1996
Enochrus (Methydrus) cinctus (Say), 1824 Hydrophilus - Willson 1970, record at Albertson College of Idaho Collection
  • Philhydrus limbalis Melsheimer, 1846
Enochrus collinus (Fall), Philydrus - WI
Enochrus (Methydrus) consors LeConte, 1863 Philydrus - IN, MN
Enochrus (Methydrus) consortus Green, 1946 - Willson 1970
Enochrus (Lumetus) diffusus (LeConte), 1855 Philhydrus - record at Albertson College of Idaho Collection
Enochrus (Lumetus) hamiltoni (Horn), 1890 Philydrus - Downie and Arnett 1996
  • Philhydrus lividus Walker, 1866
  • Philhydrus conjunctus Fall, 1901
  • Enochrus collinus Brown, 1931
  • Enochrus horni Leech, 1950
  • Enochrus pacificus Leech, 1950
  • Enochrus pyretus Leech, 1950
Enochrus (Methydrus) ochraceus (Melsheimer), 1846 Philhydrus - Willson 1970, record at Albertson College of Idaho Collection
  • Philhydrus lacustris LeConte, 1855
  • Philhydrus simplex LeConte, 1863
Enochrus (Methydrus) perplexus (LeConte), 1855 Philhydrus - Willson 1970
  • Philhydrus fimbriatus Melsheimer, 1846
Enochrus (Methydrus) pygmaeus nebulosus (Say), 1824 Hydrophilus - Willson 1970
  • Hydrophilus pygmaeus Fabricius, 1792
Enochrus (Methydrus) sayi Gunderson, 1977 - Downie and Arnett 1996

Helocombus Horn, 1890 (Subfamily Hydrobiinae)

Helocombus bifidus (LeConte), 1855 Philhydrus - Willson 1970

Helophorus Fabricius, 1775 (Subfamily Helophorinae)

Helophorus (Rhopalelophorus) angusticollis d'Orchymont - Downie and Arnett 1996
Helophorus (Rhopalelophorus) artus Smetana - IL
Helophorus (Rhopalelophorus) furius Smetana - ON, WI
Helophorus (Rhopalelophorus) inflectus McCorkle - Downie and Arnett 1996
Helophorus (Rhopalelophorus) lacustris LeConte - Downie and Arnett 1996
Helophorus (Rhopalelophorus) latipenis - WI (syn. or ssp.?)
Helophorus (Rhopalelophorus) linearis LeConte - IL, OH, ON, WI
Helophorus (Rhopalelophorus) lineatus Say - Downie and Arnett 1996
Helophorus (Rhopalelophorus) marginicollis Smetana - Downie and Arnett 1996
Helophorus (Rhopalelophorus) nitiduloides d'Orchymont - Downie and Arnett 1996
Helophorus (Rhopalelophorus) nitidulus LeConte - Downie and Arnett 1996
Helophorus (Rhopalelophorus) oblongus LeConte - Downie and Arnett 1996
Helophorus (Rhopalelophorus) orchymonti Smetana - ON, WI
Helophorus (Rhopalelophorus) orientalis Motschulsky - Downie and Arnett 1996
Helophorus (Rhopalelophorus) sempervarians Angus - Downie and Arnett 1996
Helophorus (Cephelophorus) tuberculatus Gyllenhal - Downie and Arnett 1996

Hydrobius Leach, 1815 (Subfamily Hydrobiinae)

Hydrobius fuscipes (Linnaeus), 1758 Dytiscus - Willson 1970, NMNH (web page database), record at Albertson College of Idaho Collection
Hydrobius melaenus (Germar), 1824 Sphaeridium - Willson 1970
  • Hydrophilus globosus Say, 1824
  • Hydrobius globosus; LeConte 1855
  • Hydrobius globulosus Provancher, 1877
  • Hydrobius melaenus; Winters 1926
Hydrobius tumidus LeConte, 1855 - IN

Hydrochara Berthold, 1827 (Subfamily Hydrophilinae)

Hydrochara leechi Smetana, 1980 - IL, OH, WI
Hydrochara obtusata (Say), 1823 Hydrophilus - Willson 1970, NMNH (web page database)
Hydrochara simula Hilsenhoff and Tracy - Downie and Arnett 1996
Hydrochara soror Smetana, 1980 - Downie and Arnett 1996
Hydrochara spangleri Smetana, 1980 - IL, IN, OH, WI

Hydrochus Leach, 1817 (Subfamily Hydrochinae)

Hydrochus brevitarsis Knisch - Downie and Arnett 1996
Hydrochus currani Brown - ON, WI
Hydrochus granulatus Blatchley - IN, ON, WI
Hydrochus excavatum LeConte - IN
Hydrochus inaequalis LeConte - IN
Hydrochus neosquamifer Smetana - ON, WI
Hydrochus pseudosquamifer Miller - IN, ON, WI
Hydrochus rufipes Melsheimer - IL, IN, OH, WI
Hydrochus rugosus Mulsant - IN
Hydrochus scabratus Mulsant - Downie and Arnett 1996
Hydrochus squamifer LeConte - IN, ON, WI
Hydrochus subcupreous Randall - IN, WI

Hydrophilus Geoffroy, 1762 (Subfamily Hydrophilinae)

Hydrophilus triangularis Say, 1823 - Willson 1970

Laccobius Erichson, 1837 (Subfamily Hydrobiinae)

Laccobius agilis Randall, 1838 Hydrophilus - Willson 1970
  • Laccobius ellipticus Stace Smith, 1930
  • Laccobius agilis Gentili, 1985
Laccobius carri d'Orchymont, 1942 (Laccobius) - ON
Laccobius cinereus columbianus Miller, 1965 - Downie and Arnett 1996
Laccobius fuscipunctatus - WI
Laccobius minutoides d'Orchymont, 1942 - Willson 1970
Laccobius reflexipennis Cheary, 1971 - ON, WI
  • Laccobius reflexipennis Malcolm, 1979 syn.
Laccobius spangleri Cheary, 1971 (Laccobius) - Willson 1970, NMNH (web page database)
  • Laccobius spangleri Willson, 1970, manuscript, never published
  • Laccobius spangleri Malcolm, 1979 syn.
Laccobius teneralis Cheary, 1971 (Laccobius) - ON
Laccobius truncatipenis Miller, 1965 (Laccobius) - NMNH (web page database)

Paracymus Thomson, 1867 (Subfamily Hydrobiinae)

Paracymus confluens Wooldridge, 1966 - Wooldridge 1966, Willson 1970
Paracymus confusus Wooldridge, 1966 - Downie and Arnett 1996
Paracymus despectus (LeConte), 1863 Hydrobius - Willson 1970, NMNH (web page database)
Paracymus subcupreus (Say), 1825 Hydrobius - Willson 1970, NMNH (web page database)

Sperchopsis LeConte, 1862 (Subfamily Hydrobiinae)

Sperchopsis tessellatus (Ziegler), 1844 Spercheus - Willson 1970), record at Albertson College of Idaho Collection, EB (pers. coll.)
  • Sperchopsis tessellatus; LeConte 1861
  • Hydrobius tessellatus; Horn 1873
  • Hydrocyclus tessellatus; Winters 1926
  • Sperchopsis tessellatus; Spangler, 1961

Tropisternus Solier, 1834 (Subfamily Hydrophilinae)

Tropisternus blatchleyi modestus d'Orchymont, 1938 - Willson 1970
  • Tropisternus modestus d'Orchymont, 1938, syn. by Wooldridge 1965
Tropisternus columbianus Brown, 1931 - Willson 1970
Tropisternus ellipticus LeConte, 1855 Hydrophilus - WI
  • Tropisternus affinis Motschulsky, 1859
  • Tropisternus concolor Sharp, 1882
  • Tropisternus modestus d'Orchymont, 1938
Tropisternus glaber (Herbst), 1797 Hydrophilus - Willson 1970
Tropisternus lateralis nimbatus (Say), 1823 Hydrophilus - Willson 1970
  • Tropisternus nimbatus Summers, 1874
  • Tropisternus lateralis Horn, 1876; LaRivers 1949
  • Tropisternus lateralis nimbatus Young, 1954
Tropisternus mixtus (LeConte), 1855 Hydrophilus - Willson 1970
Tropisternus natator d'Orchymont, 1938 - Willson 1970
  • Tropisternus glaber LeConte, 1859, syn. Wooldridge 1967

Page created: April 02, 2003 (EB) - Last updated: April 9, 2006 (EB)