10.5072/mdb.u01.20160921S8.1.v1 Krämer, Daria Döhren, Jörn v. MorphDBase - Morphological Description Database 2016 Nemertea Tubulanus polymorphus Morphology Serial histological sections Paraneotype Taxonomy Phylogeny Zoology eng Image 1 Image stacks of histological sections of the Paraneotype of Tubulanus polymorphus. Species identification in Tubulanus (Nemertea, Paleonemertea) species can be accomplished by internal morphological characters and barcoding techniques.