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| Kingdom Animalia | 
|  | Anocelis Stimpson, 1857 – invalid | 
|  | Astacus klamathensis Stimpson, 1857 – invalid | 
|  | Astacus nigrescens Stimpson, 1857 – invalid | 
|  | Astacus trowbridgii Stimpson, 1857 – invalid | 
|  | Asterias brevispina Stimpson, 1857 – invalid | 
|  | Asterias gigantea Stimpson, 1857 – invalid | 
|  | Bipaliidae Stimpson, 1857 – invalid | 
|  | Bipaliinae Stimpson, 1857 – valid | 
|  | Bipalium Stimpson, 1857 – valid | 
|  | Bipalium fuscatum Stimpson, 1857 – valid | 
|  | Bipalium maculatum Stimpson, 1857 – invalid | 
|  | Bipalium trilineatum Stimpson, 1857 – invalid | 
|  | Bipalium virgatum Stimpson, 1857 – invalid | 
|  | Callianassa longimana Stimpson, 1857 – invalid | 
|  | Callioplana Stimpson, 1857 – valid | 
|  | Callioplana marginata Stimpson, 1857 – valid | 
|  | Caprella californica Stimpson, 1857 – valid | 
|  | Cephalolepta Stimpson, 1857 – invalid | 
|  | Clibanarius turgidus Stimpson, 1857 – invalid | 
|  | Corophium salmonis Stimpson, 1857 – valid | 
|  | Corophium spinicorne Stimpson, 1857 – valid | 
|  | Cryptocoelum Stimpson, 1857 – invalid | 
|  | Cryptocoelum opacum Stimpson, 1857 – invalid | 
|  | Diplonchus Stimpson, 1857 – valid | 
|  | Diplonchus marmoratus Stimpson, 1857 – valid | 
|  | Elasmodes tenellus Stimpson, 1857 – invalid | 
|  | Eupagurus samuelis Stimpson, 1857 – invalid | 
|  | Eurylepta coccinea Stimpson, 1857 – invalid | 
|  | Eurylepta japonica Stimpson, 1857 – invalid | 
|  | Eurylepta nigra Stimpson, 1857 – invalid | 
|  | Euryleptidae Stimpson, 1857 – valid | 
|  | Euryleptinae Stimpson, 1857 – invalid | 
|  | Euryleptoidea Stimpson, 1857 – valid | 
|  | Fovia graciliceps Stimpson, 1857 – invalid | 
|  | Fovia trilobata Stimpson, 1857 – invalid | 
|  | Galeocephala Stimpson, 1857 – invalid | 
|  | Geoplana Stimpson, 1857 – valid | 
|  | Geoplana (Geoplana) Stimpson, 1857 – valid | 
|  | Geoplana lapidicola Stimpson, 1857 – invalid | 
|  | Geoplana tasmanica Stimpson, 1857 – valid | 
|  | Geoplanidae Stimpson, 1857 – valid | 
|  | Geoplaninae Stimpson, 1857 – valid | 
|  | Geoplanoidea Stimpson, 1857 – valid | 
|  | Hippa analoga Stimpson, 1857 – invalid | 
|  | Hippolyte taylori Stimpson, 1857 – invalid | 
|  | Holothuria californica Stimpson, 1857 – invalid | 
|  | Idotea resecata Stimpson, 1857 – invalid | 
|  | Leptoplana delicatula Stimpson, 1857 – valid | 
|  | Leptoplana fusca Stimpson, 1857 – valid | 
|  | Leptoplana humilis Stimpson, 1857 – invalid | 
|  | Leptoplana maculosa Stimpson, 1857 – valid | 
|  | Leptoplana oblonga Stimpson, 1857 – valid | 
|  | Leptoplana punctata Stimpson, 1857 – valid | 
|  | Leptoplana schoenbornii Stimpson, 1857 – valid | 
|  | Leptoplana schonbornii Stimpson, 1857 – invalid | 
|  | Leptoplanidae Stimpson, 1857 – valid | 
|  | Leptoplaninae Stimpson, 1857 – invalid | 
|  | Leptoplanoidea Stimpson, 1857 – valid | 
|  | Linckia leviuscula Stimpson, 1857 – invalid | 
|  | Liosoma arenicola Stimpson, 1857 – invalid | 
|  | Lironeca vulgaris Stimpson, 1857 – invalid | 
|  | Loxorhynchus Stimpson, 1857 – valid | 
|  | Loxorhynchus crispatus Stimpson, 1857 – valid – moss crab | 
|  | Loxorhynchus grandis Stimpson, 1857 – valid – sheep crab | 
|  | Mediaster Stimpson, 1857 – valid | 
|  | Mediaster aequalis Stimpson, 1857 – valid | 
|  | Nautiloplana Stimpson, 1857 – invalid | 
|  | Pachyplana Stimpson, 1857 – invalid | 
|  | Pachyplana lactea Stimpson, 1857 – invalid | 
|  | Pandalus danae Stimpson, 1857 – valid – dock shrimp | 
|  | Phyllodurus Stimpson, 1857 – valid | 
|  | Phyllodurus abdominalis Stimpson, 1857 – valid | 
|  | Planariidae Stimpson, 1857 – valid | 
|  | Planarioidea Stimpson, 1857 – valid | 
|  | Planeolis Stimpson, 1857 – invalid | 
|  | Polycladus elongatus Stimpson, 1857 – valid | 
|  | Porcellana rupicola Stimpson, 1857 – invalid | 
|  | Proceros albicornis Stimpson, 1857 – invalid | 
|  | Prosthiostomum affine Stimpson, 1857 – invalid | 
|  | Prosthiostomum constipatum Stimpson, 1857 – valid | 
|  | Prosthiostomum crassiusculum Stimpson, 1857 – valid | 
|  | Prosthiostomum cribrarium Stimpson, 1857 – valid | 
|  | Prosthiostomum grande Stimpson, 1857 – valid | 
|  | Prosthiostomum tenebrosum Stimpson, 1857 – invalid | 
|  | Randallia Stimpson, 1857 – valid | 
|  | Stylochidae Stimpson, 1857 – valid | 
|  | Stylochinae Stimpson, 1857 – invalid | 
|  | Stylochoidea Stimpson, 1857 – valid | 
|  | Stylochoplana Stimpson, 1857 – valid | 
|  | Stylochoplana tenera Stimpson, 1857 – invalid | 
|  | Stylochoplana tenuis Stimpson, 1857 – invalid | 
|  | Stylochopsis Stimpson, 1857 – invalid | 
|  | Stylochopsis conglomeratus Stimpson, 1857 – invalid | 
|  | Stylochopsis limosus Stimpson, 1857 – invalid | 
|  | Stylochus obscurus Stimpson, 1857 – invalid | 
|  | Tellina agilis Stimpson, 1857 – valid – northern dwarf tellin, northern dwarf-tellin | 
|  | Trachyplana Stimpson, 1857 – valid | 
|  | Trachyplana tuberculosa Stimpson, 1857 – valid | 
|  | Typhlocolax Stimpson, 1857 – invalid | 
|  | Typhlocolax acuminata Stimpson, 1857 – invalid | 
        
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