I recently wrote a stub on [[Heliophorus]], a genus of butterflies. It links the existing article on its subfamily with the existing articles of the species. As the subfamily article only lists genera, my new article is the only way to go from the subfamily article to the individual species. It is therefore useful, even though it contains nothing more than a partial list of species.
I created this list from wikipedia: it just contains all species that have an article. If I had to list my source, it would have been "Wikipedia", which is Not Acceptable, and would have been removed (I guess). So I left it unsourced.
Your article is basically a list - using Wikipedia as the source for a list is generally accepted. As long as the articles you link to have sources, then the sources don't need to be stated on the list.