I saw a ladybug on my balcony one day and I just counted the dots.
There was 18 black dots on a red/orange elytra.
The location is in Europe (Geneva, Switzerland) and usually we have quite different endemic ladybugs and also the invasive asian ladybug Harmonia axyridis.
I did not found any local ladybugs with such dot counting except articles saying the Harmonia axyridis can be found with a lot of variations (elytra color, points or stripes, etc...).
The question is: Can I be sure that a ladybugs with 18-points (found in Europe area) is of the genus Harmonia axyridis?
Note that I have a picture of the animal but I want to focus my question on the number of dots exclusively.