 Lysorophia may belong within the Recumbirostran clade, distinct from other derived lepospondyls.Nectridea may also be paraphyletic, consisting of a range of more anatomically-specialized lepospondyls.The name Holospondyli has been proposed for a clade including aïstopods, and nectrideans, and possibly adelospondyls, although not all recent phylogenetic analyses support the grouping.