Omaliini

MacLeay, 1825

ocellate rove beetles

Omaliini is a tribe of within the Omaliinae, characterized by the presence of . The tribe comprises approximately 45 and 450 described distributed across all zoogeographic regions. Fossil evidence from amber has established the age of the tribe at approximately 100 million years. The tribe exhibits considerable morphological and ecological diversity, with ongoing taxonomic research revealing numerous new species, particularly in Asia and the Papuan Region.

Omalium rivulare by (c) Donald Hobern, some rights reserved (CC BY). Used under a CC-BY license.

Omalium repandum by (c) Even Dankowicz, some rights reserved (CC BY), uploaded by Even Dankowicz. Used under a CC-BY license.

Pronunciation

How to pronounce Omaliini: /oʊˈmæliˌaɪnaɪ/

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Identification

Members of Omaliini are distinguished from other tribes by the presence of (), a feature referenced in their . The tribe is morphologically diverse, with no single set of external characters uniting all members beyond the ocelli and general omaliine body plan. Identification to typically requires examination of male , particularly the , and female genital structures. -level identification relies on detailed morphological characters including structure, shape, elytral proportions, and genitalia .

Images

Distribution

distribution across all zoogeographic regions. Documented from the Palearctic (Siberia, Far Eastern Russia, China, Japan, Nepal, Europe, Middle East), Oriental (Southeast Asia, Taiwan, Myanmar), Afrotropical, Neotropical, Nearctic, Australian, and Papuan Regions (Indonesia, Papua New Guinea, Solomon Islands). The fossil Duocalcar is known from amber of France, establishing a age of approximately 100 million years.

Similar Taxa

Other Omaliinae tribes (e.g., Anthophagini, Eusphalerini)Share the general omaliine body form but lack ; Omaliini is distinguished by the presence of ocelli, a trait absent in related tribes within the .

More Details

Fossil Record

The oldest definitive member of Omaliini, Duocalcar geminum, was discovered in opaque amber from France, dating to the latest Albian (approximately 100 million years ago). This discovery extends the known temporal range of the tribe from the Eocene to the mid-Cretaceous.

Taxonomic Activity

Recent taxonomic research has significantly expanded the known diversity of Omaliini, with numerous new described from previously underexplored regions including China, Nepal, Myanmar, and the Papuan Region. The tribe contains several species-rich including Omalium (with multiple species groups established), Paraphloeostiba, and Pycnoglypta.