I ended up looking them all up to find out what they were! But I was good and didn't change my answers!

The last one I thought was a dart frog from the dendro part of the name. I guess it must mean poison or dangerous (something like that) in Latin.

I'm going to try to look out for the scientific names more and see what I can pick up.
Over on Caudata.org I'm getting to know some of the newt and salamander names, not completely, but can recognise the names when I see them!

I actually took latin as a subject at school, but that was FAR too long ago to remember any of it! I don't think it would have any bearing on species names anyway!