PlantSyNZ mentions Hexomyza coprosmae as causing woody stem calls in Coprosma but I'm not sure if that's the only species that can do this.
In a sample from Corinne Watts, labelled as follows:
Torehape invertebrate sampling 2022/23
Restored peat lane
Plot M34
Trap A
14 Dec 2022-7 Feb 2023