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| | ADW: Caudata: Information |
 | | Of ten currently recognized extant families (comprising more than 420 extant species), all but one (Hynobiidae) are represented in North America. |
 | | Salamanders run the gamut of possible developmental patterns, from complete, obligate metamorphosis, to facultative or partial metamorphosis, to obligate paedomorphosis, in which adults retain larval characters throughout their lives (all cryptobranchids, sirenids, amphiumids, and proteids are obligate paedomorphs). |
 | | Fossil salamanders are known from most extant families, as well as four extinct families. |
| animaldiversity.ummz.umich.edu /site/accounts/information/Caudata.html (710 words) |
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