| Omma Temporal range:
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|---|---|
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| Omma stanleyi | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Coleoptera |
| Family: | Ommatidae |
| Genus: | Omma Newman, 1839 |
| Type species | |
| Omma stanleyi Newman, 1839
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| Synonyms | |
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Omma is a genus of beetles in the family Ommatidae. Omma is an example of a living fossil. The oldest species known, O. liassicum, lived during the final stage of the Triassic (Rhaetian), over 200 million years ago, though the placement of this species in Omma has been questioned.[1] Numerous other fossil species are known from the Jurassic and Cretaceous of Europe and Asia. The only living species is Omma stanleyi, which is endemic to Australia. Three other extant species endemic to Australia that were formerly part of this genus were moved to the separate genus Beutelius in 2020.[2] Omma stanleyi is strongly associated with wood, being found under Eucalyptus bark and exhibiting thanatosis when disturbed. Its larval stage and many other life details are unknown due to its rarity. Males are typically 14–20 mm in length, while females are 14.4-27.5 mm. Omma stanleyi occurs throughout eastern Australia from Victoria to Central Queensland.[2]
- ^ Li, Yan-Da; Huang, Di-Ying; Cai, Chen-Yang (2021-11-30). "New species of Omma Newman from mid-Cretaceous Burmese amber (Coleoptera, Archostemata, Ommatidae)". Deutsche Entomologische Zeitschrift. 68 (2): 341–348. doi:10.3897/dez.68.74174. ISSN 1860-1324. S2CID 244783528.
- ^ a b Escalona, Hermes E.; Lawrence, John F.; Ślipiński, Adam (2020-01-24). "The extant species of the genus Omma Newman and description of Beutelius gen. nov. (Coleoptera: Archostemata: Ommatidae: Ommatinae)". Zootaxa. 4728 (4): 547–574. doi:10.11646/zootaxa.4728.4.11. ISSN 1175-5334. PMID 32229891. S2CID 212766123.