The gastrointestinal helminths of Rattus verucundus (Rodentia: Muridae) with the description of a new species (Heligmonellidae: Nematoda) from Papua New Guinea and a comment on the Rictulariidae (Nematoda) from the Sahul Region. Transactions of the Royal Society of South Australia, 142(2) 2018: 183-195. 187 [Zoological Record Volume 155]