Anisocardia parvula Trechmann, 1918 † accepted as Tutcheria parvula (Trechmann, 1918) † (original description)
Anodontophora angulata Trechmann, 1918 † accepted as Unionites angulata (Trechmann, 1918) † (original description)
Anodontophora edmondiiformis Trechmann, 1918 † accepted as Unionites edmondiiformis (Trechmann, 1918) † (original description)
Anodontophora ovalis Trechmann, 1918 † accepted as Unionites ovalis (Trechmann, 1918) † (original description)
Bourguetia arata Trechmann, 1918 † accepted as Poroa arata (Trechmann, 1918) † (original description)
Coronaria spectabilis Trechmann, 1918 † accepted as Raha spectabilis (Trechmann, 1918) † (original description)
Dielasma zealandica Trechmann, 1917 † accepted as Fletcherithyris zealandica (Trechmann, 1917) † (original description)
Halobia zealandica Trechmann, 1918 † (original description)
Halobia zitteli var. zealandica Trechmann, 1918 † accepted as Halobia (Zittelihalobia) zealandica Trechmann, 1918 † represented as Halobia zealandica Trechmann, 1918 † (original description)
Hokonuia Trechmann, 1918 † (original description)
Hokonuia limaeformis Trechmann, 1918 † (original description)
Hokonuia rotundata Trechmann, 1918 † accepted as Hokonuia limaeformis Trechmann, 1918 † (original description)
Leda semicrenulata Trechmann, 1918 † accepted as Nuculana semicrenulata (Trechmann, 1918) † (original description)
Megalodon globularis Trechmann, 1918 † accepted as Mysidioptera globularis (Trechmann, 1918) † (original description)
Mentzeliopsis Trechman, 1918 † (original description)
Monotis salinaria var. hemispherica Trechmann, 1918 † accepted as Inflatomonotis hemispherica (Trechmann, 1918) † (original description)
Monotis salinaria var. intermedia Trechmann, 1918 † accepted as Entomonotis richmondiana (Zittel, 1865) † (original description)
Myophoria heslingtonensis Trechmann, 1918 † accepted as Maoritrigonia heslingtonensis (Trechmann, 1918) † (original description)
Myophoria nuggetensis Trechmann, 1918 † accepted as Maoritrigonia nuggetensis (Trechmann, 1918) † (original description)
Myophoria otamitensis Trechmann, 1918 † accepted as Maoritrigonia otamitensis (Trechmann, 1918) † (original description)
Mytilus mirabilis Trechmann, 1918 † (original description)
Palaeocardita quadrata Trechmann, 1918 † (original description)
Palaeoneilo otamitensis Trechmann, 1918 † accepted as Mesosaccella otamitensis (Trechmann, 1918) † (original description)
Patella nelsonensis Trechmann, 1918 † (original description)
Pleurophorus zealandicus Trechmann, 1918 † accepted as Triaphorus zealandicus (Trechmann, 1918) † (original description)
Pleurotomaria hectori Trechmann, 1918 † (original description)
Pleurotomaria hokonuiensis Trechmann, 1918 † (original description)
Pseudomonotis ochotica var. acutecostata Trechmann, 1918 † accepted as Entomonotis acutecostata (Trechmann, 1918) † (original description)
Pseudoplacunopsis placentoides Trechmann, 1918 † (original description)
Trochus (Tectus) marshalli Trechmann, 1918 † accepted as Lepidotrochus marshalli (Trechmann, 1918) † (original description)

New Zealand South for Anodontophora angulata Trechmann, 1918 † 
New Zealand South for Anodontophora edmondiiformis Trechmann, 1918 † 
New Zealand South for Anodontophora ovalis Trechmann, 1918 †