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9 Cards in this Set
- Front
- Back
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only one tropical salamander family
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Plethodontidae
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(changes in developmental timing) common
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Heterochrony
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Retention of larval traits in adults
• Gills or gill slits • Tail fins • Lack of eyelids |
Paedomorphosis
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Cryptobranchidae common name
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Asiatic Giant Salamanders and Hellbenders
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Cryptobranchidae range
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East‐central China, Japan, & Appalachian and Ozark Mountains
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Cryptobranchidae char.
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– Largest living salamanders
• Andrias japonicus reaches 1.4 m in length • Andrias davidianus reaches 1.5 m in length • Cryptobranchus alleganiensis reaches 0.75 m in length – Stout body with wrinkled skin, short limbs and laterally compressed tail – Paedomorphic traits (gill slits, no eyelids) – Has vestigial lungs – External fertilization, eggs laid in strings – Live under rocks and logs in clear, cold mountain streams |
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Hynobiidae common name
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Asiatic Giant Salamanders
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Hynobiidae range
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Asia, from the Urals to Japan, mainly above 400 latitude
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Hynobiidae char.
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– Heavy bodied with thick tails
– Mostly small (< 10 cm in length) – Adults lack gills and gill slits and have eyelids (not paedomorphic) – Have costal grooves on the trunk of the body – Lungs well developed – External fertilization – Indirect development (free‐living larval stage) – Poorly studied group |
