Although euglenids share several common characteristics with animals, which is why they were originally classified as so, there is no evidence of euglenids ever using sexual reproduction, which is just one of the reasons why they could no longer be classified as animals.
Euglenids share several common characteristics with animals. There is no evidence of euglenids. These euglenids are ever using sexual reproduction. Sexual reproduction is just one of the reasons. They could no longer be classified as animals. Animals is. They were originally classified as so.