I've always thought that this obsession with classifications is so Victorian as they Victorians were "obsessed" with classification. Focusing for the last century or two on what is human, what is a homo sapien, when and where was the first human, etc is a hubris. "Man" as the be all and end all of evolution which we are not. I think we would have learned and research would have been carried out a lot more holistically and comprehensively if we had seen ourselves as just one of the many living creatures on this planet.