Biology:Tomeurus

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Short description: Genus of fishes

Tomeurus
Tomeurus gracilis.jpg
Scientific classification edit
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cyprinodontiformes
Family: Poeciliidae
Subfamily: Poeciliinae
Tribe: Cnesterodontini
Genus: Tomeurus
C. H. Eigenmann, 1909
Species:
T. gracilis
Binomial name
Tomeurus gracilis
C. H. Eigenmann, 1909

Tomeurus gracilis is a species of poeciliid fish native to South America, in Brazil, Surinam and Venezuela. This species grows to a length of 3.3 centimetres (1.3 in) TL.[1] It is the only known member of its genus.[2] This species is classified in the tribe Cnesterodontini in the 5th edition of Fishes of the World,[3] but other workers place it in its own tribe, the Tomeurini.[4]

This is a sociable fish which lives in small schools consisting of several dozens of fishes. It is found in muddy creeks or along the sandy-muddy edges of shallow estuaries. It has been observed remaining still just below the surface but it prefers to hide beneath aquatic plants. Fertilisation is internal and, uniquely among the Poeciliinae, the females may then lay eggs placing them individually onto aquatic plants. They can also be facultively ovoviviparous.[1]

References

  1. 1.0 1.1 Froese, Rainer and Pauly, Daniel, eds. (2019). "Tomereus gracilis" in FishBase. August 2019 version.
  2. Eschmeyer, William N.; Fricke, Ron; van der Laan, Richard, eds. "Tomeurus". California Academy of Sciences. http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatget.asp?genid=5536. 
  3. J. S. Nelson; T. C. Grande; M. V. H. Wilson (2016). Fishes of the World (5th ed.). Wiley. pp. 379. ISBN 978-1-118-34233-6. https://sites.google.com/site/fotw5th/. 
  4. Paulo Henrique Franco Lucinda; Roberto E. Reis (2005). "Systematics of the subfamily Poeciliinae Bonaparte (Cyprinodontiformes: Poeciliidae), with an emphasis on the tribe Cnesterodontini Hubbs". Neotropical Ichthyology 3 (1): 1–60. doi:10.1590/S1679-62252005000100001. 

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