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Promecognathus crassus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Family:	Carabidae
Genus:	Promecognathus
Species:	P. crassus
Binomial name
Promecognathus crassus LeConte, 1868
Synonyms
Promecognathus contractus, Promecognathus corpulentus, Promecognathus grandiceps

Promecognathus crassus is a species of ground beetle in the family Carabidae. It is found along the Pacific coast of North America, from British Columbia to California.

P. crassus, like its close relative Promecognathus laevissimus, uses its large jaws to feed on millipedes, including those that produce hydrogen cyanide and benzaldehyde, like Xystocheir dissecta. It displays a high tolerance to these toxins.

References

1. ^ Bousquet, Yves (2012-11-28). "Catalogue of Geadephaga (Coleoptera: Adephaga) of America, north of Mexico". ZooKeys (245): 1–1722. Bibcode:2012ZooK..245....1B. doi:10.3897/zookeys.245.3416. ISSN 1313-2970. PMC 3577090. PMID 23431087.
2. Weary, Brandt P; Will, Kipling W (2020-09-11). Sime, Karen (ed.). "The Millipede-Predation Behavior of Promecognathus and Exceptional Cyanide Tolerance in Promecognathus and Metrius (Coleoptera: Carabidae)". Annals of the Entomological Society of America. 113 (6): 473–480. doi:10.1093/aesa/saaa023. ISSN 0013-8746 – via Academic Search Complete.

Further reading

• Lobl, I.; Smetana, A., eds. (2017). Catalogue of Palaearctic Coleoptera, Volume 1: Archostemata - Myxophaga - Adephaga. Apollo Books. ISBN 978-90-04-33029-0.

External links

• Media related to Promecognathus crassus at Wikimedia Commons

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• Scaritinae
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• Taxa named by John Lawrence LeConte
• Beetles of North America
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