Opinions from L. G. Marshall 1981
- 'Abderites altiramis is a subjective synonym of Perathereutes pungens'
- 'Acyon is a subjective synonym of Anatherium'
- 'Acyon bardus is a subjective synonym of Anatherium defossus'
- 'Acyon tricuspidatus is a subjective synonym of Anatherium defossus'
- 'Acyonidae is an invalid subgroup of Hathlyacyninae'
- 'Agustylus is a subjective synonym of Cladosictis'
- 'Agustylus cynoides is a subjective synonym of Cladosictis patagonica'
- 'Agustylus minus is a subjective synonym of Cladosictis patagonica'
- 'Agustylus primaevus is a subjective synonym of Cladosictis patagonica'
- 'Amphiproviverra is a subjective synonym of Sipalocyon'
- 'Amphiproviverra crassa is a subjective synonym of Sipalocyon gracilis'
- 'Amphiproviverra minuta is a subjective synonym of Sipalocyon gracilis'
- 'Amphithereutes is a subjective synonym of Sipalocyon'
- 'Amphiproviverridae is an invalid subgroup of Hathlyacyninae'
- 'Anatherium belongs to Hathlyacyninae'
- 'Anatherium defossus belongs to Anatherium'
- 'Anatherium herrerae belongs to Anatherium'
- 'Borhyaenidae belongs to Borhyaenoidea'
- 'Borhyaenidium belongs to Hathlyacyninae'
- 'Borhyaenidium musteloides belongs to Borhyaenidium'
- 'Borhyaenidium riggsi belongs to Borhyaenidium'
- 'Chasicostylus belongs to Hathlyacyninae'
- 'Chasicostylus castroi belongs to Chasicostylus'
- 'Cladictidae is an invalid subgroup of Hathlyacyninae'
- 'Cladosictidae is an invalid subgroup of Hathlyacyninae'
- 'Cladosictinae is an invalid subgroup of Hathlyacyninae'
- 'Cladosictis belongs to Hathlyacyninae'
- 'Cladosictis centralis belongs to Cladosictis'
- 'Cladosictis dissimilis is a subjective synonym of Cladosictis patagonica'
- 'Cladosictis externa is recombined as Sipalocyon externa'
- 'Cladosictis lateralis is a subjective synonym of Cladosictis patagonica'
- 'Cladosictis patagonica belongs to Cladosictis'
- 'Cladosictis petersoni is a subjective synonym of Cladosictis patagonica'
- 'Didelphys curvidens is an objective synonym of Notictis ortizii'
- 'Hathliacynidae was reranked as the subfamily Hathlyacyninae and belongs to Borhyaenidae'
- 'Hathliacynus is a subjective synonym of Cladosictis'
- 'Hathliacynus cultridens is a subjective synonym of Cladosictis patagonica'
- 'Hathliacynus fischeri is a subjective synonym of Cladosictis patagonica'
- 'Hathliacynus kobyi is a subjective synonym of Pseudonotictis pusillus'
- 'Hathliacynus lustratus is a subjective synonym of Cladosictis patagonica'
- 'Hathliacynus lynchi is a subjective synonym of Sipalocyon gracilis'
- 'Hathliacynus rollieri is a subjective synonym of Cladosictis patagonica'
- 'Ictioborus is a subjective synonym of Cladosictis'
- 'Ictioborus destructor is a subjective synonym of Anatherium defossus'
- 'Ictioborus fenestratus is a subjective synonym of Cladosictis patagonica'
- 'Ischyrodidelphis is a subjective synonym of Patene'
- 'Ischyrodidelphis castellanosi is a subjective synonym of Patene simpsoni'
- 'Notictis belongs to Hathlyacyninae'
- 'Notictis ortizii [misspelled as Notictis ortizi] belongs to Notictis'
- 'Notocynus belongs to Hathlyacyninae'
- 'Notocynus hermosicus belongs to Notocynus' according to Mercerat 1891
- 'Notocynus hermosicus belongs to Notocynus'
- 'Notogale belongs to Hathlyacyninae'
- 'Palaeocladosictis belongs to Ungulata'
- 'Palaeocladosictis mosesi belongs to Palaeocladosictis' according to Paula Couto 1961
- 'Patene belongs to Hathlyacyninae'
- 'Patene coluapiensis belongs to Patene'
- 'Patene simpsoni belongs to Patene'
- 'Perathereutes belongs to Hathlyacyninae'
- 'Perathereutes amputans is a subjective synonym of Sipalocyon gracilis'
- 'Perathereutes pungens belongs to Perathereutes'
- 'Pharsophorus mitis is recombined as Notogale mitis'
- 'Pharsophorus tenuis is a nomen vanum'
- 'Procladosictis belongs to Hathlyacyninae'
- 'Procladosictis anomala belongs to Procladosictis'
- 'Procladosictis erecta is a nomen vanum'
- 'Protoproviverra is a subjective synonym of Sipalocyon'
- 'Protoproviverra ensidens is a subjective synonym of Cladosictis patagonica'
- 'Protoproviverra manzaniana is a subjective synonym of Sipalocyon gracilis'
- 'Protoproviverra obusta [misspelled as Thylacodictis robusta] belongs to Thylacodictis' according to Simpson 1930
- 'Protoproviverra obusta is recombined as Sipalocyon obusta'
- 'Proviverra trouessartii is a subjective synonym of Cladosictis patagonica'
- 'Pseudocladosictis is a nomen vanum'
- 'Pseudocladosictis determinabile is a nomen vanum'
- 'Pseudonotictis belongs to Hathlyacyninae'
- 'Sipalocyon belongs to Hathlyacyninae'
- 'Sipalocyon altiramis is a subjective synonym of Sipalocyon gracilis'
- 'Sipalocyon curtus is a subjective synonym of Sipalocyon gracilis'
- 'Sipalocyon gracilis belongs to Sipalocyon'
- 'Sipalocyon longus is a subjective synonym of Sipalocyon gracilis'
- 'Sipalocyon mixtus is a subjective synonym of Sipalocyon gracilis'
- 'Sipalocyon pusillus is recombined as Pseudonotictis pusillus'
- 'Thylacodictis is a subjective synonym of Sipalocyon'
- 'Thylacodictis exilis is a subjective synonym of Sipalocyon gracilis'