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| evolved lower Devonian, marine water; diverse in fresh |
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| diphycercal tail (appears as 3 lobed in coelocanths, threadlike in lungfish); spiral valve; no vertebral centra |
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Definition
| solid braincase, unlike coelocanths |
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Definition
| functional; single in australian; double in s. american and african |
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| distinctive, teeth fused into crushing plates |
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Definition
| lobed in australian, filament in s. american and african |
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| facultative airbreather, lung is gas bladder/buoyancy regulator; doesnt tolerate decissation |
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| obligate airbreathers; african estivate, make through dry season enacases in mud cocoon |
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| hibernation; busy in mucous cocoon burrow; small tube to surface w/ plug; rains/water in lung->awakens; o2 use very low; energy in protein (muscle); toxic urea levels (7x normal) |
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