First of all a nondescribed species should not have its own article It may however be mentioned in the genus article that there are a number of species without an assigned name In second place the website New Zealand Mollusca states that Wainuia is a subgenus of Rhytida  This puts the articles about the genus and the species in Wainuia into question Furthermore the name Wainiuia was introduced by Powell in  in the journal Rec Auckland Inst Mus    and seems to be accepted by the Nomenclator Zoologicus  All this makes it very confusing but should be mentioned in the articles