Graphoderus adamsii

imago
Graphoderus adamsii
Graphoderus adamsii

marugata means round. Probabry these figures look like so but I don't agree much if it's so. Why were they named except beautiful lustrous mesh patterns or any other?
They live in the whole country but the population density is very low. They have a much tendency to like to live clear water. The lengths are 12-14.5mm.

larva
Graphoderus adamsii
Graphoderus adamsii
pupa
Graphoderus adamsii
Graphoderus adamsii