Taxonomic names from R. Arnold 1906
- Parvamussium stanfordensis, R. Arnold 1906 [unclassified species]
- Pecten (Amusium) lompocensis, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) bartschi, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) bellilamellatus, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) branneri, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) calkinsi, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) fucanus, Dall 1898 [Pectinidae]
- Pecten (Chlamys) hamlini, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) hastatus hericius (Gould 1850) [Pectinidae]
- Pecten (Chlamys) hydei, R. Arnold 1906 [unclassified species]
- Pecten (Chlamys) landesi, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) latiauratus, Conrad 1837 [Pectinidae]
- Pecten (Chlamys) lawsoni, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) morani, R. Arnold 1906 [unclassified species]
- Pecten (Chlamys) nutteri, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) proavus, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) sespeensis, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) sespeensis hydei, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) washburnei, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) wattsi, R. Arnold 1906 [Pectinidae]
- Pecten (Chlamys) wattsi morani, R. Arnold 1906 [Pectinidae]
- Pecten (Hinnites) giganteus (Gray 1825) [Pectinidae]
- Pecten (Lyropecten) ashleyi, R. Arnold 1906 [Pectinidae]
- Pecten (Lyropecten) bowersi, R. Arnold 1906 [Pectinidae]
- Pecten (Lyropecten) catalinae, R. Arnold 1906 [unclassified species]
- Pecten (Lyropecten) crassicardo hamiltoni, R. Arnold 1906 [Pectinidae]
- Pecten (Lyropecten) estrellanus catalinae, R. Arnold 1906 [Pectinidae]
- Pecten (Lyropecten) estrellanus terminus, R. Arnold 1906 [Pectinidae]
- Pecten (Lyropecten) hamiltoni, R. Arnold 1906 [unclassified species]
- Pecten (Lyropecten) miguelensis, R. Arnold 1906 [Pectinidae]
- Pecten (Lyropecten) perrini, R. Arnold 1906 [Pectinidae]
- Pecten (Lyropecten) vaughani, R. Arnold 1906 [Pectinidae]
- Pecten (Nodipecten) subnodosus (Sowerby 1836) [Pectinidae]
- Pecten (Patinopecten) caurinus (A. A. Gould 1850) [Pectinidae]
- Pecten (Patinopecten) healeyi, R. Arnold 1906 [Pectinidae]
- Pecten (Patinopecten) oweni, R. Arnold 1906 [Pectinidae]
- Pecten (Patinopecten) purisimaensis, R. Arnold 1906 [Pectinidae]
- Pecten (Patinopecten) turneri, R. Arnold 1906 [Pectinidae]
- Pecten (Pecten) auburyi, R. Arnold 1906 [Pectinidae]
- Pecten (Pecten) carrizoensis, R. Arnold 1906 [Pectinidae]
- Pecten (Pecten) coalingaensis, R. Arnold 1906 [Pectinidae]
- Pecten (Pecten) diegensis, Dall 1898 [Pectinidae]
- Pecten (Pecten) keepi, R. Arnold 1906 [Pectinidae]
- Pecten (Pecten) lecontei, R. Arnold 1906 [Pectinidae]
- Pecten (Pecten) merriami, R. Arnold 1906 [Pectinidae]
- Pecten (Pecten) sanctaecruzensis, R. Arnold 1906 [Pectinidae]
- Pecten (Plagioctenium) andersoni, R. Arnold 1906 [Pectinidae]
- Pecten (Plagioctenium) andersoni barkerianus, R. Arnold 1906 [Pectinidae]
- Pecten (Plagioctenium) barkerianus, R. Arnold 1906 [unclassified species]
- Pecten (Plagioctenium) cooperi, R. Arnold 1906 [Pectinidae]
- Pecten (Plagioctenium) eldridgei, R. Arnold 1906 [Pectinidae]
- Pecten (Plagioctenium) neahensis, R. Arnold 1906 [Pectinidae]
- Pecten (Propeamusium) clallamensis, R. Arnold 1906 [Propeamussiidae]
- Pecten (Propeamusium) riversi, R. Arnold 1906 [Propeamussiidae]
- Pecten (Propeamusium) stanfordensis, R. Arnold 1906 [Propeamussiidae]
- Pecten (Propeamusium) waylandi, R. Arnold 1906 [Pectinidae]
- Pecten (Pseudamusium) lompicoensis, R. Arnold 1906 [Propeamussiidae]
- Pecten (Pseudamusium) randolphi (Dall 1897) [Pectinidae]
- Pecten (Pseudamusium) randolphi tillamookensis, R. Arnold 1906 [Pectinidae]
- Pecten excavatus, Anton 1839 [Pectinidae]
- Pecten hastatus hindsii, Carpenter 1863 [Pectinidae]
- Pecten hericeus, Carpenter 1887 [Pectinidae]
- Pecten hericeus navarchus, Dall 1898 [Pectinidae]
- Pecten magnolia, Conrad 1857 [Pectinidae]
- Pecten palmeri, Dall 1897 [Pectinidae]
- Pecten propatulus, Conrad 1849 [Pectinidae]
- Pecten pyxidatus (Born 1778) [Pectinidae]
- Pecten wattsi (R. Arnold 1906) [Pectinidae]
- Plesiastrea californica, R. Arnold 1906 [Plesiastreidae]