Parallel Convergence, Generally speaking:
Anurans: Throat sac buoyancy, vocal mate selection, no tail
Salamanders: no, no, long tail
Hominoids: Laryn. air sac buoyancy, vocal mate selection, no tail
Monkeys: no, no, mid to long tail
Aves: Resp. air sac buoyancy, vocal mate selection, short tail
Reptiles: no, no, long tail
Walruses: Pharyn. air sac buoyancy, vocal mate selection, short tail
Mustelids: no, no (scent), long tail
Pterodons: soft tissue air sac, vocal mate sel.?, reduced tail later
Dinos: no, no, long tail
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