From editor or global species database
Type species Schneider (1868) described both Polygordius lacteus and P. purpureus in the same article, so the type could be either. Hartman Catalogue treated P. lacteus as type, probably because of page priority (this is not part of the 4thEd Code) which can be regarded as a subsequent designation. P. purpureus has since been moved to Megadrilus. [details]