incidentally, even if you are thinking about meaning, you should reach the same conclusion anyway.
'the argiope' is only one kind of spider, but we are not talking only about the argiope.
rather, we are talking about 'such spiders as the argiope'—a group that, clearly, contains the argiope and other spiders, too.
so, even if you are thinking about nothing other than meaning, you should still realize that the subject is plural.