Actinia undata Müller, 1778 accepted as Sagartiogeton undatus (Müller, 1778) accepted as Cylista undata (Müller, 1778) accepted as Sagartia undata (Müller, 1778) (original description)
Bulla scabra O. F. Müller, 1784 accepted as Hermania scabra (O. F. Müller, 1784) (original description)
Echinorhynchus salmonis Müller, 1784 (original description)
Fasciola scabra Müller, 1784 accepted as Distoma scabrum (Müller, 1784) Zeder, 1803 (original description)
Fasciola varica Müller, 1784 accepted as Derogenes varicus (Müller, 1784) Looss, 1901 (original description)
Fasciola vespertilionis Müller, 1780 accepted as Plagiorchis vespertilionis (Müller, 1780) Braun, 1900 (original description)
Nais litoralis Müller, 1784 accepted as Paranais litoralis (Müller, 1784) (original description)
Planaria gesserensis Müller OF, 1784 accepted as Lineus ruber (Müller, 1774) (original description)
Vorticeros auriculatum (Müller OF, 1784) (original description)

Danish Exclusive Economic Zone for Fasciola varica Müller, 1784 
Scandinavia for Fasciola vespertilionis Müller, 1780 

 Spelling

 for Nais litoralis Müller, 1784

Müller uses the spelling with a single 'l', thus 'litoralis'. Later authors (eg., Örsted) created misspellings ... [details]

 Spelling

 for Nais littoralis [auct. misspelling for litoralis]

The Code in Article 58.7 regards litoralis / littoralis as the same spelling for the purposes of homonymy. Thus a ... [details]

 Spelling

 for Paranais litoralis (Müller, 1784)

Müller, 1784 used the 'litoralis' spelling (single consonant) for the species name but some later authors used a ... [details]