Trachystomata Tra`chy*stom"a*ta, n. pl. [NL., fr. Gr. ? rough + stoma.] (Zo["o]l.) An order of tailed aquatic amphibians, including {Siren} and {Pseudobranchus}. They have anterior legs only, are eel-like in form, and have no teeth except a small patch on the palate. The external gills are persistent through life. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • Siren (amphibian) — Not to be confused with order Sirenia (manatees and dugongs) Taxobox name = Sirens image width = 240px image caption = Siren intermedia regnum = Animalia phylum = Chordata classis = Amphibia subclassis = Lissamphibia ordo = Caudata subordo =… …   Wikipedia

  • СИРЕНОВЫЕ — (Sirenidae), семейство хвостатых земноводных (по др. системе, подотряд (Sirenoidea, или Meantes) отр. трахистомовых (Trachystomata)). Дл. от 15 до 90 см. Тело длинное, вальковатое, с веслообразным хвостом. Есть только передние недоразвитые… …   Биологический энциклопедический словарь

  • sound production — ▪ animal       in animals, the initiation of sound as a means of information transmission. Sounds are termed vocal when produced in the respiratory system and mechanical when produced by mutual contact of body parts or by contact with some… …   Universalium

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