File talk:Diploceraspis.jpg
So far, I have a clear idea of the head-shape and the foot-shape, but not of the mouth. That's why I sort of hid the mouth in all 3 views in this image.
Also, the TAIL in the skeletons I've seen is simply a long, thin string. I'm wondering if I perhaps made a big mistake by making the tail a vertical paddle that swishes right-left.
Could it be that the tail is more like an otter's, and that perhaps (like a flying squirrel) there's a membrane stretching from that tail to the 4 limbs and then up to the posterior of the boomerang-shaped head? That'd have allowed the amphibian to move much like a Spanish Dancer, with big vertical ripples passing along its body, made by vertical head-tilts, vertical limb-flapping, and vertical tail-flapping.
That, at least, gives one reason for that ridiculously shaped head. The only other reasons I can think of for the head shape are
a) presenting a certain shape when at the surface? In that era, were there any leaves which were shaped like boomerangs? Waterlily-like plants, perhaps?
b) perhaps having a sensor array on the underside of the anterior, much like the sensor array that sharks use to sense fish hiding in the sand, or the feeler-fingers that goatfish and flying gurnards use?
c) Using surface tension and weight to keep the animal's head level with the surface of the water? What practical value would that have? I can imagine 3: 1) stealth; 2) easily finding water-striders and other surface-clinging foods; and
3) perhaps allowing the animal to breathe air effortlessly while it slept?
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