Omma

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Genus of beetles

title: "Omma" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["ommatidae", "endemic-fauna-of-australia", "insects-of-australia", "jurassic-insects", "cretaceous-insects", "mesozoic-life-of-asia", "rhaetian-first-appearances", "extant-late-triassic-first-appearances", "archostemata-genera", "taxa-named-by-edward-newman"] description: "Genus of beetles" topic_path: "geography/australia" source: "https://en.wikipedia.org/wiki/Omma" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of beetles ::

| fossil_range = | image = Omma stanleyi CCAL3.0.jpg | image_caption = Omma stanleyi | taxon = Omma | authority = Newman, 1839 | type_species = Omma stanleyi | type_species_authority = Newman, 1839 | synonyms =

  • Procarabus Oppenheim, 1888
  • Chalepocarabus Handlirsch, 1906
  • Pyrochroophana Handlirsch, 1906
  • Ommamima Ponomarenko, 1964
  • ?Cionocups Kirejtshuk, 2020 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. 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*.* 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.

Description

According to Li, Huang & Cai, 2021, Omma is distinguished from other ommatid beetles by the following characters:

Species, temporal and spatial distribution

The following extinct and extant species have been described.

Taxa labelled (?) are considered questionable by Kirejtshuk, 2020

Omma stanleyi Newman, 1839 (type), recent, Australia

Fossil species

References

References

  1. (2021-11-30). "New species of Omma Newman from mid-Cretaceous Burmese amber (Coleoptera, Archostemata, Ommatidae)". Deutsche Entomologische Zeitschrift.
  2. (2020-01-24). "The extant species of the genus Omma Newman and description of Beutelius gen. nov. (Coleoptera: Archostemata: Ommatidae: Ommatinae)". Zootaxa.
  3. [http://insects.tamu.edu/research/collection/hallan/Arthropoda/Insects/Coleoptera/Family/Ommatidae.txt Ommatidae Species List] {{webarchive. link. (2012-10-23 at Joel Hallan’s Biology Catalog. Texas A&M University. Retrieved on 11 May 2012.)
  4. (2012). "New fossil species of ommatids (Coleoptera: Archostemata) from the Middle Mesozoic of China illuminating the phylogeny of Ommatidae". BMC Evolutionary Biology.
  5. Kirejtshuk, Alexander G.. (2020-02-17). "Taxonomic Review of Fossil Coleopterous Families (Insecta, Coleoptera). Suborder Archostemata: Superfamilies Coleopseoidea and Cupedoidea". Geosciences.
  6. (2021-11-12). "Is the beetle Omma (Insecta: Coleoptera) a living fossil?". Geological Society, London, Special Publications.

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ommatidaeendemic-fauna-of-australiainsects-of-australiajurassic-insectscretaceous-insectsmesozoic-life-of-asiarhaetian-first-appearancesextant-late-triassic-first-appearancesarchostemata-generataxa-named-by-edward-newman