Kingdom: Fungi
Phylum:: Ascomycota
Subphylum: Pezizomycotina
Class: Dothideomycetes
Subclass: Dothideomycetidae
Order: Capnodiales
Family: Mycosphaerellaceae
Genus: Mycosphaerella
Species: M. pittospori
Binomial name: Mycosphaerella pittospori
Synonym: Sphaerella pittospori
Common name: Lemonwood leaf spot.

Mycosphaerella pittospori is a fungus forming wine red coloured spots on the leaves of Pittosporum eugenioides (lemonwood/tarata). It has been reported from Southland, Taranaki, Coromandel and Northland. It usually affects the lower leaves.  

The top surface of the leaves.
[1]  

The underside of the same leaves.
[2] 

[3]  

The next two photos are of the same spot on different sides of the same leaf.
[4]  

[5] 

Thanks to Wikipedia for text and information:https://creativecommons.org/licenses/by-sa/3.0/