Lepisosteiformes


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Related to Lepisosteiformes: Acipenseriformes, Amiiformes, gars, Lepisosteus spatula

Lepisosteiformes

[‚lep·ə‚säs·tē·ə′fȯr‚mēz]
(vertebrate zoology)
An equivalent name for Semionotiformes.

Lepisosteiformes

 

(formerly Lepidosteiformes), an order of freshwater fishes of the ganoid group. The fishes have a long, cylindrical body covered with an armor of strong, rhomboid ganoid scales. The olfactory sacs and the nostrils are located at the tip of the elongated snout. The spinal column is totally ossified. The vertebrae of Lepisosteiformes, unlike those of all other fishes, are opisthocoelous, that is, convex in front and concave behind.

Fossils of the order have been found in Europe in Cretaceous deposits and in North America and Asia (India) in Eocene deposits. Modern representatives comprise a single family, embracing the single genus Lepidosteus.

REFERENCES

Zhizn’ zhivotnykh, vol. 4, part 1. Moscow, 1971.
Nikol’skii, G. V. Chastnaia ikhtiologiia, 3rd ed. Moscow, 1971.
References in periodicals archive ?
Therefore, in the chordate, a permanent germinal epithelium first appears in Holostei (Lepisosteiformes) reported by Grier and Taylor (1998) in Centropomus undecimalis.
L1A L1B L2 Osteichthyes Actinopterygii Ginglymodi Lepisosteiformes Lepisosteidae Lepisosteidae indet.
Cariotipo del pejelagarto tropical Atractosteus tropicus (Lepisosteiformes: Lepisosteidae) y variacion cromosomica en sus larvas y adultos.