Opinions from J. A. Jeletzky 1966
- 'Actinosepia belongs to Trachyteuthididae'
- 'Archaeosepia belongs to Sepiinae'
- 'Atractites belongs to Xiphoteuthididae'
- 'Atractites philippii is recombined as Metabelemnites philippii'
- 'Atractitidae is a subjective synonym of Xiphoteuthididae'
- 'Aulacoceras belongs to Aulacoceratidae'
- 'Aulacoceras ellipticum is recombined as Mojsisovicsteuthis ellipticus'
- 'Aulacoceratinae was reranked as the family Aulacoceratidae and belongs to Aulacocerida'
- 'Ausseites is a subjective synonym of Atractites'
- 'Belemnites belongs to Belemnitinae'
- 'Belemnitida belongs to Coleoidea'
- 'Belemnitidae belongs to Belemnitina'
- 'Belemnitina belongs to Belemnitida'
- 'Belemnitinae belongs to Belemnitidae'
- 'Belemnococeras is a subjective synonym of Metabelemnites'
- 'Belemnopseina belongs to Belemnitida'
- 'Belemnosella belongs to Belemnoseidae'
- 'Belemnosidae is corrected as Belemnoseidae and belongs to Sepiida'
- 'Belemnosis belongs to Belemnoseidae'
- 'Belemnoteuthidae is corrected as Belemnoteuthididae and belongs to Belemnitina'
- 'Belemnotheutis is corrected as Belemnoteuthis and belongs to Belemnoteuthididae'
- 'Belocurta belongs to Belopteridae'
- 'Belopeltidae is replaced by Loligosepiidae'
- 'Belopeltis is a subjective synonym of Loligosepia'
- 'Beloptera belongs to Belopteridae'
- 'Belopteridae belongs to Sepiida'
- 'Belopteridium belongs to Belopteridae'
- 'Belopterina belongs to Belopteridae'
- 'Belosepia belongs to Belosepiinae'
- 'Belosepiella belongs to Belosepiellidae'
- 'Belosepiellidae belongs to Sepiida'
- 'Belosepiidae was reranked as the subfamily Belosepiinae and belongs to Sepiidae'
- 'Beloteuthidae is a subjective synonym of Teudopseidae'
- 'Beloteuthis is a subjective synonym of Teudopsis'
- 'Buelowiteuthis belongs to Aulacoceratidae'
- 'Calliconites belongs to Xiphoteuthididae'
- 'Celaenidae is corrected as Kelaenidae and belongs to Mesoteuthina'
- 'Celaenoteuthis belongs to Kelaenidae'
- 'Chitinoteuthidae is corrected as Chitinoteuthididae and belongs to Aulacocerida'
- 'Chitinoteuthis belongs to Chitinoteuthididae'
- 'Choanoteuthis is a subjective synonym of Atractites'
- 'Chondroteuthididae belongs to Belemnitina'
- 'Chondroteuthis belongs to Chondroteuthididae'
- 'Conoteuthis belongs to Diplobelidae'
- 'Dibranchiata is a subjective synonym of Coleoidea'
- 'Dictyoconites belongs to Aulacoceratidae'
- 'Dimitobelidae belongs to Belemnopseina'
- 'Diplobelida was reranked as the suborder Diplobelina and belongs to Belemnitida'
- 'Diplobelidae belongs to Diplobelina'
- 'Diplobelus belongs to Diplobelidae'
- 'Dorateuthis belongs to Leptoteuthididae'
- 'Geopeltidae is corrected as Geopeltididae and belongs to Loligosepiina'
- 'Geopeltis belongs to Geopeltididae'
- 'Geoteuthidae is replaced by Geopeltididae'
- 'Geoteuthis is replaced by Geopeltis'
- 'Glyphiteuthis belongs to Trachyteuthididae'
- 'Groenlandibelidae belongs to Sepiida'
- 'Hastites belongs to Hastitidae'
- 'Hastitinae is corrected as Hastitidae and belongs to Belemnitina'
- 'Leptoteuthidae is corrected as Leptoteuthididae and belongs to Prototeuthina'
- 'Leptoteuthis belongs to Leptoteuthididae'
- 'Lioteuthidae is corrected as Lioteuthididae and belongs to Prototeuthina'
- 'Lioteuthis belongs to Lioteuthididae'
- 'Listroteuthis belongs to Kelaenidae'
- 'Loliginites belongs to Loligosepiidae'
- 'Loligosepia belongs to Loligosepiidae'
- 'Loligosepiidae belongs to Loligosepiina'
- 'Loligosepiina belongs to Teuthida'
- 'Mastigophora belongs to Loligosepiidae'
- 'Mesoteuthina belongs to Teuthida'
- 'Metabelemnites belongs to Xiphoteuthididae'
- 'Mojsisovicsteuthis belongs to Xiphoteuthididae'
- 'Naefia belongs to Groenlandibelidae'
- 'Naefia neogaeia belongs to Naefia'
- 'Necroteuthidae is corrected as Necroteuthididae and belongs to Loligosepiina'
- 'Necroteuthis belongs to Necroteuthididae'
- 'Niobrarateuthis belongs to Kelaenidae'
- 'Orthoceras convergens is recombined as Mojsisovicsteuthis convergens'
- 'Palaeololiginidae belongs to Mesoteuthina'
- 'Palaeololigo belongs to Palaeololiginidae'
- 'Palaeosepia is a subjective synonym of Loligosepia'
- 'Parabelopeltis belongs to Loligosepiidae'
- 'Paraplesioteuthis belongs to Plesioteuthididae'
- 'Pavloviteuthis belongs to Diplobelidae'
- 'Permoteuthis belongs to Phragmoteuthididae'
- 'Phragmoteuthidida is corrected as Phragmoteuthida and belongs to Coleoidea'
- 'Phragmoteuthididae belongs to Phragmoteuthida'
- 'Phragmoteuthis belongs to Phragmoteuthididae'
- 'Plesioteuthididae belongs to Prototeuthina'
- 'Plesioteuthis belongs to Plesioteuthididae'
- 'Prototeuthina belongs to Teuthida'
- 'Pseudohastites was reranked as Belemnites (Pseudohastites) and belongs to Belemnites'
- 'Pseudosepia belongs to Belosepiinae'
- 'Rhopalobelus is a subjective synonym of Hastites'
- 'Sepia belongs to Sepiinae'
- 'Sepiida belongs to Coleoidea'
- 'Sepiidae belongs to Sepiida'
- 'Sepiinae belongs to Sepiidae'
- 'Spirula belongs to Spirulidae'
- 'Spirulidae belongs to Sepiida'
- 'Spirulirostra belongs to Spirulirostridae'
- 'Spirulirostrella belongs to Belemnoseidae'
- 'Spirulirostridae belongs to Sepiida'
- 'Spirulirostridium belongs to Spirulirostridae'
- 'Spirulirostrina belongs to Spirulirostrinidae'
- 'Spirulirostrinidae belongs to Sepiida'
- 'Stenosepia is a subjective synonym of Belosepia'
- 'Styloteuthis belongs to Plesioteuthididae'
- 'Styracoteuthis belongs to Vasseuriidae'
- 'Teudopsidae is corrected as Teudopseidae and belongs to Mesoteuthina'
- 'Teudopsis belongs to Teudopseidae'
- 'Teuthida belongs to Coleoidea'
- 'Trachyteuthidae is corrected as Trachyteuthididae and belongs to Mesoteuthina'
- 'Trachyteuthis belongs to Trachyteuthididae'
- 'Tusoteuthis belongs to Palaeololiginidae'
- 'Vampyromorpha was reranked as the suborder Vampyromorphina and belongs to Teuthida'
- 'Vasseuria belongs to Vasseuriidae'
- 'Vasseuriidae belongs to Sepiida'
- 'Xiphoteuthidae is corrected as Xiphoteuthididae and belongs to Aulacocerida'
- 'Xiphoteuthis is a subjective synonym of Atractites'
- 'Zugmontites belongs to Xiphoteuthididae'