Admete cristata Marwick, 1926 † accepted as Waipaoa cristata (Marwick, 1926) † (original description)
Aethocola cliftonensis Marwick, 1926 † accepted as Austrofusus cliftonensis (Marwick, 1926) † (original description)
Ancilla (Baryspira) subhebera Marwick, 1926 † accepted as Alocospira subhebera (Marwick, 1926) † (original description)
Ancilla (Baryspira) tirangiensis Marwick, 1926 † accepted as Amalda tirangiensis (Marwick, 1926) † (original description)
Cerithidea tirangiensis Marwick, 1926 † accepted as Zeacumantus tirangiensis (Marwick, 1926) † (original description)
Cirsotrema angulatum Marwick, 1926 † (original description)
Cominella compacta Marwick, 1926 † (original description)
Cominella hendersoni Marwick, 1926 † (original description)
Crepidula haliotoidea Marwick, 1926 † accepted as Maoricrypta haliotoidea (Marwick, 1926) † (original description)
Dentalium otamaringaense Marwick, 1926 † (original description)
Euthriofusus tangituensis Marwick, 1926 † accepted as Fusinus tangituensis (Marwick, 1926) † (original description)
Inquisitor asper Marwick, 1926 † accepted as Aoteadrillia asper (Marwick, 1926) † (original description)
Leptomya simplex Marwick, 1926 † (original description)
Lima watersi Marwick, 1926 † (original description)
Lippistes pehuensis Marwick, 1926 † accepted as Edithais pehuensis (Marwick, 1926) † (original description)
Lucinida tirangiensis Marwick, 1926 † accepted as Pteromyrtea tirangiensis (Marwick, 1926) † (original description)
Malletia (Minormalletia) tenera Marwick, 1926 † accepted as Malletia tenera Marwick, 1926 † (original description)
Mangilia tarankiensis Marwick, 1926 † accepted as Antiguraleus taranakiensis (Marwick, 1926) † (original description)
Marginella whitecliffensis Marwick, 1926 accepted as Protoginella whitecliffensis (Marwick, 1926) † (original description)
Melanopsis waitaraensis Marwick, 1926 † accepted as Calliotectum waitaraense (Marwick, 1926) † (original description)
Myrtaea (Eulopia) papatikiensis Marwick, 1926 † accepted as Myrtea papatikiensis Marwick, 1926 † (original description)
Neilo sublaevis Marwick, 1926 † (original description)
Neilo waitaraensis Marwick, 1926 † (original description)
Nucula grangei Marwick, 1926 † accepted as Ennucula grangei (Marwick, 1926) † (original description)
Nucula otamaringaensis Marwick, 1926 † accepted as Ennucula otamaringaensis (Marwick, 1926) † (original description)
Nucula ruatakiensis Marwick, 1926 † accepted as Linucula ruatakiensis (Marwick, 1926) † (original description)
Nuculana ellisi Marwick, 1926 † accepted as Pseudoportlandia ellisi (Marwick, 1926) † (original description)
Nuculana onairoensis Marwick, 1926 † accepted as Saccella onairoensis (Marwick, 1926) † (original description)
Phalium grangei Marwick, 1926 † accepted as Echinophoria grangei (Marwick, 1926) † (original description)
Ringicula torquata Marwick, 1926 † (original description)
Streptopelma henchmani Marwick, 1926 † accepted as Aeneator henchmani (Marwick, 1926) † (original description)
Struthiolaria nana Marwick, 1926 † accepted as Pelicaria nana (Marwick, 1926) † (original description)
Struthiolaria praenuntia Marwick, 1926 † (original description)
Terebra omahuensis Marwick, 1926 † accepted as Duplicaria omahuensis (Marwick, 1926) † (original description)
Thyasira planata Marwick, 1926 † accepted as Thyasira marwicki Amano, C. Little, K. A. Campbell, R. G. Jenkins & Saether, 2015 † (original description)
Turricula curtata Marwick, 1926 † accepted as Marshallena curtata (Marwick, 1926) † (original description)
Turricula waitaraensis Marwick, 1926 † accepted as Thatcheria waitaraensis (Marwick, 1926) † (original description)
Venericardia urutiensis Marwick, 1926 † accepted as Purpurocardia urutiensis (Marwick, 1926) † (original description)
Vexillum ambulacrum Marwick, 1926 † accepted as Austromitra ambulacrum (Marwick, 1926) † (original description)
Vexillum fractum Marwick, 1926 † accepted as Microvoluta fracta (Marwick, 1926) † (original description)
Zealeda mutabilis Marwick, 1926 † accepted as Ledella mutabilis (Marwick, 1926) † (original description)

 Type designation

 for Melanopsis waitaraensis Marwick, 1926 †

"Coast south side Wai-iti Stream", New Zealand. [details]