In that link i linked, Cody also mentions dwarfs like selayer and jampea. Thing with dwarves, is they arent that much smaller than mainlands really. I think people just think dwarf and an image of a 3 ft person next to a 6 ft person pops into their head. A dwarf retic doesnt mean it is only going to grow 10 ft while a mianland is double that at 18-20 ft. It just means its a little smaller lol.
There are lots of different local to retics but the ones listed on the link i gave from Cody lists the more 'mainstream' ones.
It's like dwarf boas. Sure they are smaller than say a pure Peruvian BCC or large colombian BCI but it doesnt mean it's going to be a 2 ft boa. Now Tarahumara boas are rather small, i think adults are like 4 ft. But that would be the equivalent of say a Kalatoa retic vs a mainland retic.