You are confronted with a box of preserved grasshoppers of various species that are new to science and have not been described. Your assignment is to separate them into species. There is no accompanying information as to where or when they were collected. Which species concept will you have to use?

Given the conditions that we cannot know the geographical location of the specimens and that we cannot know if they can appear among themselves, it is best to use the phenotypic concept of species in which phenotypic comparisons are made and grouped according to their phenotypic similarities.

the answer to your question is sperm

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.