diff --git a/app/models/taxon_name_class/iczn/unavailable/nomen_nudum.rb b/app/models/taxon_name_class/iczn/unavailable/nomen_nudum.rb
index 4c0922a3ff..ba182fa6eb 100644
--- a/app/models/taxon_name_class/iczn/unavailable/nomen_nudum.rb
+++ b/app/models/taxon_name_class/iczn/unavailable/nomen_nudum.rb
@@ -54,4 +54,16 @@ class ReplacementNameWithoutTypeFixationAfter1930 < TaxonNameClass::Iczn::Unavai
   class UmbiguousGenericPlacement < TaxonNameClass::Iczn::Unavailable::NomenNudum
   end
 
+  class ElectronicOnlyPublicationBefore2012 < TaxonNameClass::Iczn::Unavailable::NomenNudum
+  end
+
+  class ElectronicPublicationNotInPdfFormat < TaxonNameClass::Iczn::Unavailable::NomenNudum
+  end
+
+  class ElectronicPublicationWithoutIssnOrIsbn < TaxonNameClass::Iczn::Unavailable::NomenNudum
+  end
+
+  class ElectronicPublicationNotRegisteredInZoobank < TaxonNameClass::Iczn::Unavailable::NomenNudum
+  end
+
 end