basis of recordBouchet P., Rocroi J.P., Hausdorf B., Kaim A., Kano Y., Nützel A., Parkhaev P., Schrödl M. & Strong E.E. (2017). Revised classification, nomenclator and typification of gastropod and monoplacophoran families. <em>Malacologia.</em> 61(1-2): 1-526.[details] Available for editors [request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Classification Nudipleura (clade; this is [Pleurobranchiomorpha + the nudibranchs]) is skipped because (1) we are already short of ranks at this level of the tree and (2) it is useful to keep such a well-known name as Nudibranchia at its traditional Order level, as long as it is tenable. The concept of Nudipleura is nevertheless correct and has been given strong support by Grande et al. (2004) against the traditional grouping Notaspidea = [Umbraculida + Pleurobranchiomorpha] permanently ruled out).
Based on molecular data (Grande et al., 2004), the Nudibranchia were challenged to be a polyphyletic group, with Pleurobranchomorpha being the sister to the Anthobranchia. Conversely, Wägele & Willan (2000) found strong morphological evidence for the monophyly of Nudibranchia. Four years later, there does not seem to be any additional evidence that Nudibranchia are not monophyletic so they are retained as a valid taxon until convincingly challenged. [details]