Although he does moreso resemble a Spider Monkey, Diddy is referred to as a Chimpanzee in DK64, having the nickname of Champion of Chimpanzees in the manual.
The comics were great fun overall, especially when Ian Flynn took over replacing Ken Penders as the main writer. If you never read the comics before and you're interested, there's 3 jumping on points:
1. Start at the very beginning; 2. (NOT REALLY RECOMMENDED) Start at Issue 160 at the beginning of Ian Flynn's run; 3. Start at Issue 252, which starts off with a literal soft reboot of the comics universe after the events of the first crossover with Mega Man.
Either way, for your convenience, here's a reading order guide:
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The IDW comics are being written by Flynn, and from what I've seen and heard so far, it's good stuff.