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Related to Caudata: Urodela


(vertebrate zoology)
An equivalent name for Urodela.



(tailed amphibians), an order of amphibians. The somewhat cylindrical, sometimes greatly elongated, trunk is continuous with the relatively long tail, which is more or less rounded or laterally compressed.

Caudates swim in water by making lateral motions with the tail, pressing their legs to the body and extending them backward. The legs are short and in some representatives, such as Amphiuma, very weak. In the Sirenidae the hind legs are absent. The hind legs have two to five digits. The frontal and parietal bones are paired and not fused. The vertebrae are amphicoelous or opisthocoelous, and the trunk vertebrae have short ribs. The pectoral girdle is cartilaginous. The tibia and fibula are not fused.

Development occurs without metamorphosis. Some adult caudates, such as the Sirenidae and Proteidae, retain a number of features characteristic of the larvae, such as exterior gills, gill slits, and lateral-line organs. In larvae, usually the forelegs appear first. The body length is up to 160 cm (giant salamander).

The order includes 54 genera, united in eight families: Cryptobranchidae, Sirenidae, Proteidae, Salamandridae, Amphiumidae, Ambystomatidae, Plethodontidae, and Hynobiidae. There are about 130 species, which are distributed mainly in the temperate zone of the northern hemisphere; only a few species are found in South America.

Most caudates are wholly aquatic; some live in cave waters, such as the Proteidae and the colorless and eyeless Typhlomolge rathbuni. Some live in water only during the reproductive period. A number of species are wholly terrestrial; a few caudates of the genus Aneides live in trees.

In some terrestrial caudates and in caudates living in rapidly flowing waters the lungs are usually more or less reduced or completely absent, and respiration occurs mainly through the mucosa of the mouth and pharynx, as well as through the skin. A small number of caudates, such as the Amphiumidae and Proteidae, breathe through gills even in the adult stage.

Sexual maturity occurs in the second to third year of life. Some caudates are characterized by neoteny. Some develop breeding colors and engage in a definite courtship during the reproductive period. In the majority, fertilization is internal, by means of a sperm-containing gelatinous capsule (spermatophore), which is taken up by the female into the spermatheca of the cloaca. Caudates deposit three to several hundred eggs. Terrestrial species deposit their eggs in a depression in the soil, beneath leaves, in rotten stumps, in tree hollows, and in other such places. Some species are viviparous or ovoviviparous.

Caudates feed mainly on various invertebrates; they also eat the eggs of fish and other amphibians. Large individuals even swallow small vertebrates. A few species, such as Mertensiella, can shed their tails (autotomy).

There are ten species of Caudata in the USSR, which belong to six genera: Hynobius, Ranodon, Onychodactylis fischeris, Triturus, Mertensiellae caucasicae, and Salamandra.


Zhizn’ zhivotnykh, vol. 4. Moscow, 1969.
Noble, G. K. The Biology of the Amphibia. New York, 1954.
Bishop, S. C. Handbook of Salamanders: The Salamanders of the United States, of Canada and of Lower California. Ithaca-New York, 1943. (Handbooks of American Natural History, vol. 3. Edited by A. H. Wright.)
Thorn, R. Les Salamandres d’Europe, d’Asie, et d’Afrique du Nord. Paris, 1968.


References in periodicals archive ?
Combined effects of salinity and temperature on the feeding, reproductive, and survival rates of Eupleara caudata (Say) and Urosalpinx cinerea (Say) (Prosobranchia: Muricidae).
HETEROKONTOPHYTA Chrysophyceae Synurales Synuraceae Mallomonas caudata (Ivanov) Mallomonas acaroides (Perry) Synura uvella (Ehr.
Species expected Common name F R M N Caudata Ambystomatidae Ambystoma jefjersonianum Jefferson's salamander X X A.
No-choice assays were conducted for six of the most abundant epifaunal species that were known or suspected of being herbivorous, namely the amphipods Ampithoe longimana, Dulichiella appendiculata, and Elasmopus levis, the isopod Paracerceis caudata, and the gastropods Diastoma varium and Costoanachis sp.
7 Boehmeria caudata 21 0 Calyptranthes rigida 26 0 Cinchona officinalis(***) 39 0 Clusia havetioides 84 0 Cyathea furfuracea 108 0.
Egg cases of Eupleura caudata were also observed but not as frequently as those of U.
Railliet; Henry, 1912); Philometroides caudata Moravec, Scholz and Live-Rodriguez, 1995; Procamallanus (Spirocamallanus) inopinatus Travassos, Artigas and Pereira, 1928 and Procamallanus (Spirocamallanus) saofranciscensis (Moreira, Oliveira and Costa, 1994) (Table 1).
La vegetacion es un matorral subtropical con buen estado de conservacion y abundantes especies lenosas caducifolias entre las que destacan: Acacia farnesiana, Casimiroa edulis, Cedrela dugesii, Celtis caudata, Condalia velutina, Ehretia latifolia, Erythrina sp.
En Venezuela el conocimiento de esta familia es limitado, unicamente se conocen los registros de Phragmatopoma caudata (Kroyer) Morch, 1863 para las islas Margarita, Cubagua y Tortuga, Sabellaria floridensis Hartman, 1944, para la isla de Margarita (Kirtley, 1994), y Phragmatopoma sp.
Key words: Wound, regeneration, amphibians, Caudata, Salamandridae, amphibian injuries, Mesotriton alpestris.
Digit ratio has not been investigated in amphibian species within the order caudata.
2009, Figueiredo de Andrade 2009, Albarelli and Santos-Acosta, 2010), have reported the feeding habits of some Liophis snakes, which included earthworms, arthropods, fishes, lizards, little amphibians (Anura and Caudata, including in some cases anuran larvae) and rodents.