Anomia berryi Spieker, 1922 † (original description)
Arca (Arca) cholana Spieker, 1922 † (original description)
Arca larkinii E. T. Nelson, 1870 † (additional source)
Calliostoma noduliferum E. T. Nelson, 1870 † (additional source)
Cardium (Trigoniocardia) affinis (E. T. Nelson, 1870) † (new combination reference)
Cerithium grillanum Spieker, 1922 † (original description)
Cerithium infranodatum Spieker, 1922 † (original description)
Chione (Chione) angelana Spieker, 1922 † (original description)
Chione (Chione) propinqua Spieker, 1922 † (original description)
Chione (Chione) variabilis E. T. Nelson, 1870 † represented as Chione variabilis E. T. Nelson, 1870 † (basis of record)
Clementia dariena (Conrad, 1856) † (basis of record)
Conus berryi Spieker, 1922 † (original description)
Conus bocapanansis Spieker, 1922 † (original description)
Conus cacuminatus Spieker, 1922 † (original description)
Conus molis var. bravoi Spieker, 1922 † (original description)
Cypraea angustirima Spieker, 1922 † (original description)
Dosinia delicatissima A. P. Brown & Pilsbry, 1913 † (basis of record)
Macrocallista helenae Spieker, 1922 † (original description)
Marginella incrassata E. T. Nelson, 1870 † (basis of record)
Mulinia zorritensis (E. T. Nelson, 1870) † (basis of record)
Phos latirugatus Spieker, 1922 † (original description)
Pitaria (Lamelliconcha) planivieta (Guppy, 1866) † (basis of record)
Polinices subangulata E. T. Nelson, 1870 † (additional source)
Sinum carolanum Spieker, 1922 † (original description)
Solenosteira alternata (E. T. Nelson, 1870) † (basis of record)
Tellina zapotalensis Spieker, 1922 † (original description)
Terebra gausapata var. herviderana Spieker, 1922 † (original description)
Terebra tuberosa (E. T. Nelson, 1870) † (basis of record)
Transennella herviderana Spieker, 1922 † (original description)
Triumphis solida (E. T. Nelson, 1870) † (basis of record)
Turbo belli Spieker, 1922 † (original description)
Turritella altilira Conrad, 1857 † (basis of record)
Turritella alturana Spieker, 1922 † (replacement name source)
Turritella bifastigata E. T. Nelson, 1870 † (additional source)
Turritella charana Spieker, 1922 † accepted as Turritella abrupta Spieker, 1922 † accepted as Caviturritella abrupta (Spieker, 1922) † (original description)
Turritella filicincta Grzybowski, 1899 † (basis of record)
Turritella filicincta var. varicosta Spieker, 1922 † (original description)
Turritella infracarinata Gryzbowski, 1899 † (additional source)
Turritella prenuncia Spieker, 1922 † (original description)
Turritella prenuncia var. inconspicua Spieker, 1922 † (original description)