Gnathoncus rotundatus

(Kugelann, 1792)

clown beetle

Gnathoncus rotundatus is a of clown in the . It is a small beetle with a distribution spanning multiple continents. The species has been to Australia and New Zealand. It is associated with poultry manure where it functions as a agent of pests.

Gnathoncus rotundatus Jacobson by Georgiy Jacobson. Used under a Public domain license.Gnathoncus rotundatus (10.3897-zookeys.689.12021) Figures 99–102 by Lackner T, Leschen RAB (2017) A monograph of the Australopacific Saprininae (Coleoptera, Histeridae). ZooKeys 689: 1-263. https://doi.org/10.3897/zookeys.689.12021. Used under a CC BY 4.0 license.Gnathoncus rotundatus (10.3897-zookeys.689.12021) Figure 90 by Lackner T, Leschen RAB (2017) A monograph of the Australopacific Saprininae (Coleoptera, Histeridae). ZooKeys 689: 1-263. https://doi.org/10.3897/zookeys.689.12021. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Gnathoncus rotundatus: /ˈnæθɒŋkəs roʊtʌnˈdeɪtəs/

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Habitat

Associated with poultry manure and other decaying matter. Found in manure pits of caged-layer poultry operations where it inhabits the surface layers of dry manure.

Distribution

to Europe, Northern Asia (excluding China), North America, South America, and Southern Asia. to Australia and New Zealand. Specific regional records include Russia (European and Far East), Armenia, Azerbaijan, Georgia, North Africa, Canary Islands, Afghanistan, Iran, Israel, Syria, Kazakhstan, Turkmenistan, Uzbekistan, Mongolia, Japan, China, Taiwan, Canada, USA, South Africa, St. Paul Island, and Chile.

Diet

of and first- . and immatures feed on eggs and early-stage larvae of manure-breeding .

Ecological Role

agent in poultry operations. Functions as a of pest , particularly (). Present at lower compared to the related Carcinops pumilio in poultry facilities.

Human Relevance

Used in programs for poultry operations to suppress manure-breeding . Reduces reliance on chemical in poultry facilities. Self-propagates when manure is kept dry and undisturbed.

Similar Taxa

  • Carcinops pumilioAnother in the same found in poultry manure; distinguished by being more common and occurring at higher than Gnathoncus rotundatus
  • Gnathoncus nanusClosely related congeneric also present in poultry facilities; distinguished by taxonomic separation at the species level

More Details

Conservation status

Not evaluated

Population dynamics in poultry facilities

Occurs naturally in poultry facilities but at lower numbers compared to Carcinops pumilio. Benefits from dry manure management practices that support .

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Sources and further reading