The same thing goes for web-toed salamanders (Hydromantes)
Sometimes, info can be hard to find for genera since many websites are a lot more detailed about species. When I can't find a lot of info about a genus, I'll usually just look at some of the most common species and combine info from those. It's not perfect, but it works.
So, for web-toed salamander I would write about the Shasta Salamander, since it is the salamander species I am finding a lot on?
That would make sense.For Hydromantes, though, there are only 3 species, so it wouldn't be too hard to gather info on all three. But yes, since that one's probably the most well-researched, it would make sense to use a lot of that info for your notes.