It could also be a case of convergent evolution, do they occupy the same niches?
My hypothesis is that stomatocardia is actually an offshoot species of toxodenta (though we'd have to do some molecular plastiology research to determine its not the opposite way)
I think we shoukd look at more things in the anthroposcene through a biological lense like this
All I see are under-evolved crabs.
These SCP's keep getting weirder...
Amazing research. But where to place the clasical clip (two wires in a plastic wrap)?
For the uninitiated.
Wow! Thank you!