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Hingemouth

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(Redirected from Phractolaemidae) Species of ray-finned fish

Hingemouth
Conservation status

Least Concern  (IUCN 3.1)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Gonorynchiformes
Family: Phractolaemidae
Boulenger, 1901
Genus: Phractolaemus
Boulenger, 1901
Species: P. ansorgii
Binomial name
Phractolaemus ansorgii
Boulenger, 1901
Synonyms

The hingemouth (Phractolaemus ansorgii) is a small freshwater fish that is found only in west central Africa, the sole member of the family Phractolaemidae of the family Kneriidae.

The mouth can extend like a small trunk, thus the name, and has just two teeth, both in the lower jaw. Its mouth can extend up to 30% of the hingemouth's head length. It has highly flexible lips, and its mouth is mainly supported by cartilage and other connective tissues. The swim bladder has two compartments, and can function as a lung, allowing the hingemouth to survive in oxygen-poor environments.

References

  1. Lalèyè, P.; Moelants, T. & Olaosebikan, B.D. (2020). "Phractolaemus ansorgii". IUCN Red List of Threatened Species. 2020: e.T181936A135017400. doi:10.2305/IUCN.UK.2020-2.RLTS.T181936A135017400.en. Retrieved 25 November 2024.
  2. Evans, Allyson J.; Naylor, Emily R.; Lujan, Nathan K.; Kawano, Sandy M.; Hernandez, L. Patricia (June 2024). "Deploy the proboscis!: Functional morphology and kinematics of a novel form of extreme jaw protrusion in the hingemouth, Phractolaemus ansorgii (Gonorynchiformes)". Journal of Anatomy. 244 (6): 929–942. doi:10.1111/joa.14020. ISSN 0021-8782. PMC 11095310. PMID 38308591.
  3. Banister, Keith F. (1998). Paxton, J.R.; Eschmeyer, W.N. (eds.). Encyclopedia of Fishes. San Diego: Academic Press. p. 97. ISBN 0-12-547665-5.
Taxon identifiers
Phractolaemus ansorgii


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