Of course not! Strictly speaking, it is a nomenclatural and spelling error. But in the case of Scenedesmus, Chlorella, Chlamydomonas, Oedogonium, and some genera that begin with compound Latin letters (Oe, Sc, Sch, etc.), this spelling was used to avoid confusion with other genera in the floristic lists. Sorry, I should have written S. indicus and S. producto-capitatus.