In botany the valid, current author is at the end, in zoology at the front.
Make sure that both the interpretation / parsing of authorships and the rendering of atomised authorships respect the nomenclatural code of the name record. If missing the code should follow the botanical rules as ex authors are much more common in botanical names.
ex authors follow a different sequence in botany and zoology: https://en.wikipedia.org/wiki/Author_citation_(botany)#Usage_of_the_term_%22ex%22
In botany the valid, current author is at the end, in zoology at the front. Make sure that both the interpretation / parsing of authorships and the rendering of atomised authorships respect the nomenclatural code of the name record. If missing the code should follow the botanical rules as ex authors are much more common in botanical names.