One of them is phylogeny of human tapeworms. Listen to what absurd conclusion this "phylogeny" led: The closest relatives of human
tapeworms did not colonize either cows or pigs. Instead, they lived inside East African herbivores such as antelopes, with the lions and hyenas that kill them as their final hosts. So the darwinian conclusion (or better another weird darwinian fancy) is this one: human ancestors followed lions and ate the remains after them. So the parasite switch to humans and afterwards to pigs. So human were scavengers by parasite phylogeny conclusion. Believe it if you like.