agreed.
However in this example mode of movement is rather different even with worm lizards, legless lizards, and burrowing snakes (i have kept and studied a few species of those as well, except the worm lizards, only read about them) in comparison to terrestrial caecilians. although they do share a more or less common bond in outer body shape, and being able to burrow to different degrees.
for kicks i looked at wiki on this topic:
Convergent evolution - Wikipedia, the free encyclopedia
their photo example is Euphorbia obesa and Astrophytum asterias. this seems fitting in this conversation in that although their surface appears similar they are in fact quite different. for example, on is a euphorbia the other is a cactus. cacti have areoles, the former doesnt. ok, not a biggy here. but lets look at another cool trait with cacti is their cortex and corticle bundles (ok its 4 am and i am probably spelling things horribly wrong, forgive me). this allows the space from the central "core" (where the phloem/xylem are - vascular bundle) to the skin (called the cortex) to be able to get pretty large. this is why you can find cacti so fat, but things like euphorbia tend not to be, and if they are they also tend to have at least a much smaller succulent area.
in this example, perhaps something like Lophophora williamsii and Astrophytum asterias would be more fitting, in more ways....but they are far more closely related.
another kind of not so the same example might be parasitic plants and fungi...for example dutch mans pipe and any number of fungi.....Amanita muscaria are a pretty example common to much of the world.
