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Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Subclassis: Pterygota
Ordo: Coleoptera
Subordo: Polyphaga
Infraordo: Staphyliniformia
Superfamilia: Hydrophiloidea

Familia: Hydrophilidae
Subfamilia: Sphaeridiinae
Tribus: Megasternini
Genus: Oosternum
Species (28): O. acutheca – O. aequinoctiale – O. asperrimum – O. atramentarium – O. attacomis – O. attenuatum – O. cicatricosum – O. convexum – O. costatum – O. gibbicolle – O. holosericeum – O. intermedium – O. latum – O. okinawaense – O. pubescens – O. robiginosum – O. rudicolle – O. sahlbergi – O. sculptum – O. sericicolle – O. sharpi – O. shigehisai – O. simplex – O. soricoides – O. sugitai – O. takedai – O. toshiiei – ?O. palpalis

Add (7): O. andersoni – O. bacharenge – O. cercyonoides – O. insulare – O. luciae – O. megnai – O. pecki
Name

Oosternum Sharp, 1882

Synonyms

Pemelus Horn, 1890
Authority for synonymy: Hansen, 1999: 241 ('syn. n.')

References

Deler-Hernández, A., Cala-Riquelme, F. & Fikáček, M. 2014. A review of the genus Oosternum Sharp of the West Indies (Coleoptera: Hydrophilidae: Sphaeridiinae). Deutsche entomologische Zeitschrift, 61(1): 43–63. DOI: 10.3897/dez.61.7566 Reference page.
Fikáček, M. 2009: Taxonomic revision of the New World species of the genus Oosternum Sharp. III. A new species of the O. aequinoctiale species group from Costa Rica (Coleoptera: Hydrophilidae: Sphaeridiinae). Koleopterologische rundschau, 79 : 179–187. PDF
Fikáček, M.; Hebauer, F. 2009: Taxonomic revision of the New World species of the genus Oosternum Sharp (Coleoptera: Hydrophilidae: Sphaeridiinae) II. The Oosternum convexum species group. Acta Entomologica Musei Nationalis Pragae 49(1): 103–117. PDF Reference page.
Fikáček, M.; Hebauer, F.; Hansen, M. 2009: Taxonomic revision of New World species of the genus Oosternum Sharp (Coleoptera: Hydrophilidae: Sphaeridiinae) I. Definition of species groups and revision of the Oosternum aequinoctiale group. Zootaxa, 2054: 1–37. Abstract & excerpt
Hansen, M. 1999: Taxonomic changes in the genera Oosternum Sharp and Paroosternum Scott (Coleoptera: Hydrophilidae). Entomologica scandinavica, 30 (3): 241–242. ISSN: 0013-8711 DOI: 10.1163/187631200X00084
Hansen, M. 1999: Hydrophiloidea (s. str.) (Coleoptera). World catalogue of insects, 2 . Stenstrup: Apollo Books. ISBN 87-88757-31-5 ISSN: 1398-8700
Hebauer, F. 2002: Hydrophilidae of northern India and southern Himalaya (Coleoptera: Hydrophilidae). Acta coleopterologica, 18 (1): 3–72. [not seen]
Hoshina, H. 2009: Description of a new species of the genus Oosternum (Coleoptera: Hydrophilidae) from Fukui Pref., Honshu, Japan. Bulletin of the Regional Environmental Research and Education Center, University of Fukui, "Nature and Environment Sea Area", ( 16 ): 1–5. ISSN: 1343-084X
Hoshina, H. 2011: A new species of the genus Oosternum (Coleoptera, Hydrophilidae) from the Ryukyus, Japan. Japanese journal of systematic entomology, 17 (2): ?-? [not seen]
Hoshina, H.; Satô, M. 2004: Two new species of the genus Oosternum (Coleoptera: Hydrophilidae) from Japan. Memoirs of the Research and Education Center for Regional Environment Fukui University, ( 11 ): 9–15. ISSN: 1343-084X
Hoshina, H.; Satô, M. 2005: Taxonomic notes of the genus Oosternum (Coleoptera: Hydrophilidae) from Japan. Memoirs of the Research and Education Center for Regional Environment Fukui University, ( 12 ): 1–9. ISSN: 1343-084X [not seen]
Short, A.E.Z.; Hebauer, F. 2006: World Catalogue of Hydrophiloidea – additions and corrections, 1 (1999–2005) (Coleoptera). Koleopterologische rundschau, 76: 315–359. PDF

Oosternum is a genus of water scavenger beetles in the family Hydrophilidae. There are more than 20 described species in Oosternum.[1][2][3]
Species

These 23 species belong to the genus Oosternum:

Oosternum acutheca
Oosternum aequinoctiale Motschulsky, 1855
Oosternum andersoni Deler-Hernández, Cala-Riquelme & Fikáček, 2014
Oosternum attacomis Spangler, 1962
Oosternum attenuatum
Oosternum bacharenge Deler-Hernández, Cala-Riquelme & Fikáček, 2014
Oosternum cercyonoides Deler-Hernández, Cala-Riquelme & Fikáček, 2014
Oosternum cicatricosum
Oosternum convexum
Oosternum costatum (LeConte, 1855)
Oosternum gibbicolle
Oosternum holosericeum
Oosternum horni d'Orchymont, 1914
Oosternum insulare Deler-Hernández, Cala-Riquelme & Fikáček, 2014
Oosternum intermedium
Oosternum latum Fikacek, Hebauer & Hansen, 2009
Oosternum luciae Deler-Hernández, Cala-Riquelme & Fikáček, 2014
Oosternum megnai Deler-Hernández, Cala-Riquelme & Fikáček, 2014
Oosternum okinawaense Hoshina, 2011
Oosternum pecki Deler-Hernández, Cala-Riquelme & Fikáček, 2014
Oosternum pubescens (LeConte, 1855)
Oosternum sharpi Hansen, 1999
Oosternum simplex

References

"Oosternum Report". Integrated Taxonomic Information System. Retrieved 2019-09-24.
"Oosternum". GBIF. Retrieved 2019-09-24.

"Oosternum genus Information". BugGuide.net. Retrieved 2019-09-24.

Further reading

Lobl, I.; Smetana, A., eds. (2015). Catalogue of Palaearctic Coleoptera, Volume 2: Hydrophiloidea - Staphylinoidea. Apollo Books. ISBN 978-90-04-29685-5.

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