Thursday, October 24, 2019

The frog model

Ineffable Island reports on "First Four Legged Creatures". Amphibians of course.

The report sketches out an "amphibian" that was perhaps a couple feet long and still, at base, a water creature. They poked their heads above water to spot prey on land. The land prey will be arthropod - the report cites millipedes. Given the upper jaw strength on the amphibian, the arthropodic prey will have had hard upper carapaces already (guarding against other bugs I guess).

One possibility which the report doesn't note yet: mating-calls. A tetrafin/-pod water-breather like Ichthyostega might have got the ability to lock down its breathing-apparatus, to move from pond A to pond B. The next stage will be to take in and expel air - for music, that the sound might carry across ponds. No point in pond B if there aren't any females there. But if pond C calls back - go for it.

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