ooh, that's clever. You'd have to accept semi and hemi as number references (i.e. half) but if so then it works.Is the theme that all their scientific names have Latin Greek number references in them?
I was trying to work something out from the common names, given that Gentle Lemur seems to have deliberately used the number 6 rather than the word six in two of the names, and both the 6 animals are right next to southern animals. And I figured Malayan Angelfish was also a deliberate name-choice, perhaps connecting to Asian Wild Ass (as opposed to him using Onager). But I couldn't make any further connections...