@lionelb It's interesting because coryli, as any educated schoolboy worth his salt will know, is from the Latin corylus, or Hazel (one of the food plants), as was the wont of Carl Linnaeus (father of classification) when he named species. But as for colocasia, I genuinely have no idea how that came about. A quick Google search suggests it's Greek for edible water lily roots, which works for yam, but not for this little creature. A mystery forevermore, I think.