Sadly almost extinct now at the type locality and so far only location where I have seen this species on the Chatham Islands (another population has been reported from Akatore, near Dunedin but I don't know how large that one is). I noted the serious decline at this site in November 2018 but at the time had no idea why this had happened, as the surrounding macro-vegetation was little changed from what it was when I had seen this site during December 2008. I assumed the decline was caused by coastal erosion and salt spray / storm surges. On my most recent visit I was shocked to see ALL the macro-vegetation gone and most of the lichen habitat buried in the soil that had previously been held back by plants. A careful inspection revealed that the lichen habitat was covered in sheep (Ovis aries) droppings. I suspect that some sheep fell down from the farmland above, and prior to being rescued (or dying of starvation) ate ALL of the vegetation at this location. A complete mess. I found only two Caloplaca maculata colonies, the image here is of the largest which measured 15 mm diameter. I have not yet found this species anywhere else on the Chatham Islands but assume it must be somewhere else there. Fingers crossed this population will recover but I seriously doubt it.

Previous Observations:
https://inaturalist.nz/observations/1346329
https://inaturalist.nz/observations/18751569