Ancylus compressus Nyst, 1845 † (original description)
Anomia rugosa Nyst, 1845 † accepted as Pododesmus subrugosus (A. d'Orbigny, 1852) † (original description)
Buccinum crassiusculum Nyst, 1845 accepted as Nassarius crassiusculus (Nyst, 1845) (original description)
Buccinum spectabile Nyst, 1845 † accepted as Tritia spectabilis (Nyst, 1845) † (original description)
Cancellaria granulata Nyst, 1845 † accepted as Unitas granulata (Nyst, 1845) † (original description)
Cardita latisulca Nyst, 1845 † (original description)
Cardita omaliana Nyst, 1845 † accepted as Scalaricardita omaliana (Nyst, 1845) † (original description)
Cardita squamulosa Nyst, 1845 † accepted as Cardites squamulosa (Nyst, 1843) † (original description)
Cerithium variculosum Nyst, 1845 † accepted as Bittium sublima (A. d'Orbigny, 1852) † (original description)
Corbula arnouldii Nyst, 1845 † accepted as Varicorbula arnouldii (Nyst, 1845) † (original description)
Corbula sowerbii Nyst, 1846 accepted as Corbula speciosa Reeve, 1843 (original description)
Corbulomya Nyst, 1845 accepted as Lentidium De Cristofori & Jan, 1832 (original description)
Crassatella landinensis Nyst, 1845 † (original description)
Cytherea cycladiformis Nyst, 1835 accepted as Pitar rudis (Poli, 1795) (source of synonymy)
Cytherea trigona Nyst, 1835 accepted as Gouldia minima (Montagu, 1803) (source of synonymy)
Donax striatella (Brocchi, 1814) accepted as Moerella donacina (Linnaeus, 1758) (basis of record)
Fusus multisulcatus Nyst, 1845 † accepted as Vagantospira multisulcata (Nyst, 1845) † (original description)
Helix haesendonckii Nyst, 1845 † accepted as Cepaea haesendonckii (Nyst, 1845) † (original description)
Lucina curviradiata Nyst, 1835 accepted as Digitaria digitaria (Linnaeus, 1758) (source of synonymy)
Lucina galeottiana Nyst, 1845 † accepted as Gonimyrtea galeottiana (Nyst, 1845) † (original description)
Lucina volderiana Nyst, 1845 † (original description)
Mactra striata Nyst, 1845 accepted as Spisula solida (Linnaeus, 1758) (original description)
Melania inflata Nyst, 1836 † accepted as Melania nystii Nyst, 1836 † accepted as Melanoides fasciata (J. Sowerby, 1819) † (source of synonymy)
Natica crassa Nyst, 1845 accepted as Natica patula J. Sowerby, 1822 (original description)
Natica deshayesiana Nyst, 1845 † (original description)
Nucula galeottiana Nyst, 1845 † accepted as Saccella galeottiana (Nyst, 1845) † (original description)
Nucula philippiana Nyst, 1845 accepted as Yoldiella philippiana (Nyst, 1845) (original description)
Nucula ryckholtiana Nyst, 1845 † accepted as Leionucula ryckholtiana (Nyst, 1843) † (original description)
Nucula subtransversa Nyst, 1845 † (original description)
Pecten cretaceus Nyst, 1845 † accepted as Syncyclonema cretacea (Nyst, 1845) † (original description)
Pecten incurvatus Nyst, 1845 † (original description)
Pecten lamalii Nyst, 1845 † accepted as Karnekampia lilli (Pusch, 1837) † (original description)
Pecten liasinus Nyst, 1845 † accepted as Entolium lunare (F. A. Roemer, 1839) † (original description)
Pecten scabriusculus Nyst, 1845 † accepted as Mimachlamys plebeia (Lamarck, 1806) † (original description)
Pecten sowerbyi Nyst, 1845 † accepted as Aequipecten opercularis opercularis (Linnaeus, 1758) (original description)
Pecten sublaevigatus Nyst, 1845 † accepted as Aequipecten sublaevigatus (Nyst, 1845) † (original description)
Pholadomya konincki Nyst, 1845 † (original description)
Planorbis depressus Nyst, 1845 † accepted as Gyraulus bosqueti (Glibert & de Heinzelin de Braucourt, 1954) † (original description)
Pleurotoma acuticosta Nyst, 1845 † (original description)
Pleurotoma bosqueti Nyst, 1845 † (original description)
Pleurotoma dumontii Nyst, 1845 † (original description)
Rissoa dolium Nyst, 1845 accepted as Pusillina philippi (Aradas & Maggiore, 1844) (original description)
Rissoa duboisii Nyst, 1845 † (original description)
Rissoa philippiana Nyst, 1845 accepted as Parthenina suturalis (R. A. Philippi, 1844) (original description)
Rissoa succincta Nyst, 1845 † (original description)
Solarium dumontii Nyst, 1845 † (original description)
Solarium grande Nyst, 1845 † accepted as Climacopoma grande (Nyst, 1845) † (original description)
Spondylus auriculatus Nyst, 1845 † (original description)
Terebra basterotii Nyst, 1845 † accepted as Strioterebrum basterotii (Nyst, 1845) † (original description)
Teredo burtini Nyst, 1845 † accepted as Nausitora burtini (Nyst, 1845) † (original description)
Trigonocoelia goldfussii Nyst, 1845 † accepted as Oblimopa goldfussii (Nyst, 1845) † (original description)
Trochus dekinii Nyst, 1845 † accepted as Calliostoma simile (J. Sowerby, 1816) † (original description)
Turbinella pyruliformis Nyst, 1845 † accepted as Turehua pyruliformis (Nyst, 1845) † (original description)
Turbo firketi Nyst, 1845 † accepted as Calliomphalus firketi (Nyst, 1845) † (original description)
Turritella crenulata Nyst, 1845 † (original description)
Venus maelenii Nyst, 1846 † accepted as Venus sublaevigata Nyst, 1845 † (original description)
Venus sublaevigata Nyst, 1845 † (original description)
Voluta semigranosa Nyst, 1845 accepted as Pisanella semigranosa (Nyst, 1845) † (original description)

Belgium for Ancylus compressus Nyst, 1845 † 
Belgium for Anomia rugosa Nyst, 1845 † 
Belgium for Cardita latisulca Nyst, 1845 † 
Belgium for Cardita omaliana Nyst, 1845 † 
Belgium for Cardita squamulosa Nyst, 1845 † 
Belgium for Corbula arnouldii Nyst, 1845 † 
Belgium for Crassatella landinensis Nyst, 1845 † 
Belgium for Helix haesendonckii Nyst, 1845 † 
Belgium for Lucina galeottiana Nyst, 1845 † 
Belgium for Nucula galeottiana Nyst, 1845 † 
Belgium for Nucula ryckholtiana Nyst, 1845 † 
Belgium for Nucula subtransversa Nyst, 1845 † 
Belgium for Pecten incurvatus Nyst, 1845 † 
Belgium for Pecten sublaevigatus Nyst, 1845 † 
Belgium for Planorbis depressus Nyst, 1845 † 
Belgium for Planorbis depressus Nyst, 1845 † 
Belgium for Solarium grande Nyst, 1845 † 
Belgium for Spondylus auriculatus Nyst, 1845 † 
Belgium for Teredo burtini Nyst, 1845 † 
Belgium for Trochus dekinii Nyst, 1845 † 
Belgium for Turbo firketi Nyst, 1845 † 
Germany for Pecten liasinus Nyst, 1845 † 
Sweden for Pecten cretaceus Nyst, 1845 † 

 Nomenclature

 for Pecten cretaceus Nyst, 1845 †

New name for Pecten corneus Sowerby, sensu Nilsson, 1827 [details]

 Taxonomic remark

 for Pecten liasinus Nyst, 1845 †

Based on Pecten corneus sensu Goldfuss, 1836, non Sowerby, 1818 [details]

 Type locality

 for Planorbis depressus Nyst, 1845 †

Borgloon ("Looz") and Kleine-Spouwen ("Kleyn-Spauwen"), Limburg, Belgium; Rupelian, early Oligocene [details]