Opinions from O. A. Hoel 1999
- 'Aeglina prisca is recombined as Pricyclopyge prisca'
- 'Agnostus tullbergi is recombined as Geragnostus (Geragnostella) tullbergi'
- 'Ampyx brevicauda belongs to Ampyx' according to Wiman 1905
- 'Ampyx brevicauda is recombined as Pytine brevicauda'
- 'Arthrorhachidae is a subjective synonym of Metagnostidae'
- 'Arthrorhachis belongs to Metagnostidae'
- 'Arthrorhachis elliptifrons belongs to Arthrorhachis' according to Tjernvik 1956
- 'Asaphus palpebrosus is recombined as Symphysurus palpebrosus'
- 'Battus tardus is recombined as Arthrorhachis tardus'
- 'Carinocranium belongs to Endymioniinae'
- 'Conophrys salopiensis is recombined as Shumardia (Conophrys) salopiensis'
- 'Cyclopyge gallica is recombined as Pricyclopyge gallica'
- 'Endymioniidae was reranked as the subfamily Endymioniinae and belongs to Raphiophoridae'
- 'Entomostracites actinurus is recombined as Hintzeia actinura'
- 'Falanaspis aliena belongs to Falanaspis' according to Tjernvik 1956
- 'Geragnostidae is a subjective synonym of Metagnostidae'
- 'Geragnostus belongs to Metagnostidae'
- 'Geragnostus (Geragnostella) belongs to Geragnostus'
- 'Hintzeia belongs to Pliomeridae'
- 'Nileus belongs to Nileidae'
- 'Pliomera mathesii is a subjective synonym of Hintzeia actinura'
- 'Pricyclopyge belongs to Pricyclopyginae'
- 'Pricyclopyginae belongs to Cyclopygidae'
- 'Protopliomerops celsaora is recombined as Hintzeia celsaora'
- 'Pytine belongs to Endymioniinae'
- 'Robergiella belongs to Remopleurididae'
- 'Robergiella tjernviki belongs to Robergiella'
- 'Shumardia belongs to Shumardiidae'
- 'Shumardia (Conophrys) belongs to Shumardia'
- 'Shumardia nericiensis is recombined as Shumardia (Conophrys) nericiensis' according to Wiman 1905
- 'Shumardia nericiensis is recombined as Shumardia (Conophrys) nericiensis'
- 'Shumardia pusilla belongs to Shumardia' according to Sars 1835
- 'Shumardia pusilla is recombined as Shumardia (Conophrys) pusilla'
- 'Shumardia pusilla belongs to Shumardia' according to Stubblefield 1926
- 'Symphysurus belongs to Nileidae'
- 'Symphysurus breviceps is recombined as Varvia breviceps'
- 'Symphysurus socialis is a subjective synonym of Symphysurus angustatus'
- 'Trilobites angustatus is recombined as Symphysurus angustatus' according to Boeck 1838
- 'Trilobites angustatus is recombined as Symphysurus angustatus'
- 'Trinodidae is a subjective synonym of Metagnostidae'
- 'Varvia belongs to Nileidae'