Sorry if this question is better for /r/askanthropology but I remember hearing a story on NPR recently about either a mythological or historical Jizanthapus, or a species named jizanthapus and I can't remember which it is. Of course this is part of a joke by Louis CK, but I think the name itself has a basis in reality and I'm trying to figure out what it is.
Everything I've been able to find has been related to Louis CK's bit about a 6 year old boy whose name he couldn't say, since he lived in NYC.
Could it be that you've misheard the name Xanthippus of Carthage?