Identificaciones de drewwalky

This caterpillar got attention due to painful sting on my friend's hand while tidying their garden. Was feeding on leaves of Lillypilly Syzygium sp., another of this species feeding on Daintree Penda Xanthostemon verticillatus. Caterpillar kept on leaves in a jar, formed a round dark-coloured pupa. Can anyone help with accurate ID please?

After 7 weeks a moth emerged from the cocoon of this caterpillar:
https://inaturalist.ala.org.au/observations/147161109

Front wing length 17.5mm

Last image shows the cocoon after the moth had emerged through a narrow slit. Does anyone know, how does a moth make that kind of opening?