Marphysa is een geslacht van borstelwormen uit de familie van de Siboglinidae. De wetenschappelijke naam van het geslacht werd voor het eerst geldig gepubliceerd in 1866 door Quatrefages.

Soorten
De volgende soorten zijn bij het geslacht ingedeeld:
 Marphysa acicularum Webster, 1884
 Marphysa aegypti Elgetany, El-Ghobashy, Ghoneim & Struck, 2018
 Marphysa aenea (Blanchard in Gay, 1849)
 Marphysa angelensis Fauchald, 1970
 Marphysa aransensis Treadwell, 1939
 Marphysa atlantica (Kinberg, 1865)
 Marphysa bernardi Rullier, 1972
 Marphysa bifurcata Kott, 1951
 Marphysa bonhardi (McIntosh, 1885)
 Marphysa borradailei Pillai, 1958
 Marphysa brasiliensis (Hansen, 1882)
 Marphysa brevitentaculata Treadwell, 1921
 Marphysa californica Moore, 1909
 Marphysa capensis (Schmarda, 1861)
 Marphysa chevalensis Willey, 1905
 Marphysa chirigota Martin, Gil & Zanol in Martin et al. 2020
 Marphysa corallina (Kinberg, 1865)
 Marphysa depressa (Schmarda, 1861)
 Marphysa digitibranchia Hoagland, 1920
 Marphysa elityeni Lewis & Karageorgopoulos, 2008
 Marphysa emiliae Molina-Acevedo & Carrera-Parra, 2017
 Marphysa fauchaldi Glasby & Hutchings, 2010
 Marphysa formosa Steiner & Amaral, 2000
 Marphysa fragilis Treadwell, 1911
 Marphysa furcellata Crossland, 1903
 Marphysa gaditana Martin, Gil & Zanol in Martin et al. 2020
 Marphysa galluccii Orensanz, 1990
 Marphysa gayi Quatrefages, 1866
 Marphysa gravelyi Southern, 1921
 Marphysa hamata (Schmarda, 1861)
 Marphysa hemasoma Quatrefages, 1866
 Marphysa hongkongensa Wang, Zhang & Qiu, 2018
 Marphysa iloiloensis Glasby, Mandario, Burghardt, Kupriyanova, Gunton & Hutchings, 2019
 Marphysa januarii (Grube, 1881)
 Marphysa johnsoni (Langerhans, 1880)
 Marphysa kristiani Zanol, da Silva & Hutchings, 2016
 Marphysa macintoshi Crossland, 1903
 Marphysa mangeri Augener, 1918
 Marphysa mauritanica Gillet, 1990
 Marphysa maxidenticulata Liu, Hutchings & Kupriyanova, 2018
 Marphysa minima (Hansen, 1882)
 Marphysa moribidii Idris, Hutchings & Arshad, 2014
 Marphysa mortenseni Monro, 1928
 Marphysa mossambica (Peters, 1854)
 Marphysa mullawa Hutchings & Karageorgopoulis, 2003
 Marphysa multipectinata Liu, Hutchings & Sun, 2017
 Marphysa nobilis Treadwell, 1917
 Marphysa orensanzi Carrera-Parra & Salazar-Vallejo, 1998
 Marphysa orientalis Treadwell, 1936
 Marphysa parvipes (Benham, 1927)
 Marphysa peruviana Quatrefages, 1866
 Marphysa posterobranchia Day, 1962
 Marphysa proppi (Averincev, 1972)
 Marphysa pseudosessiloa Zanol, da Silva & Hutchings, 2017
 Marphysa quadrioculata (Grube, 1856)
 Marphysa regalis Verrill, 1900
 Marphysa sanguinea (Montagu, 1813)
 Marphysa saxicola Langerhans, 1881
 Marphysa schmardai Gravier, 1907
 Marphysa sebastiana Steiner & Amaral, 2000
 Marphysa sessilobranchiata Hartmann-Schröder, 1984
 Marphysa simplex (Langerhans, 1884)
 Marphysa soembaensis Augener, 1933
 Marphysa striata (Kinberg, 1865)
 Marphysa stylobranchiata Moore, 1909
 Marphysa tamurai Okuda, 1934
 Marphysa teres (Treadwell, 1922)
 Marphysa teretiuscula (Schmarda, 1861)
 Marphysa tribranchiata Liu, Hutchings & Sun, 2017
 Marphysa tripectinata Liu, Hutchings & Sun, 2017
 Marphysa unibranchiata Knox & Cameron, 1970
 Marphysa victori Lavesque, Daffe, Bonifácio & Hutchings, 2017
 Marphysa viridis Treadwell, 1917

Taxon inquirendum 
 Marphysa grunwaldi (Risso, 1826)
 Marphysa pacifica (Rullier, 1972)
 Marphysa triantennata (Risso, 1826)

Nomen nudum 
 Marphysa corallina Ehlers, 1901

Synoniemen 
 Marphysa posteriobranchia Day, 1962 => Marphysa posterobranchia Day, 1962
 Marphysa adenensis Gravier, 1900 => Paucibranchia adenensis (Gravier, 1900)
 Marphysa amadae Fauchald, 1977 => Treadwellphysa amadae (Fauchald, 1977)
 Marphysa angeli Carrera-Parra & Salazar-Vallejo, 1998 => Nicidion angeli (Carrera-Parra & Salazar-Vallejo, 1998)
 Marphysa antipathum Pourtalès, 1867 => Eunice antipathum (Pourtalès, 1867)
 Marphysa belli [auctt.] => Marphysa bellii (Audouin & Milne Edwards, 1833) => Paucibranchia bellii (Audouin & Milne Edwards, 1833)
 Marphysa bellii (Audouin & Milne Edwards, 1833) => Paucibranchia bellii (Audouin & Milne Edwards, 1833)
 Marphysa bulla Liu, Hutchings & Kupriyanova, 2018 => Marphysa victori Lavesque, Daffe, Bonifácio & Hutchings, 2017
 Marphysa capensis Fauvel, 1950 => Marphysa corallina (Kinberg, 1865)
 Marphysa cinari Kurt-Sahin, 2014 => Paucibranchia cinari (Kurt-Sahin, 2014)
 Marphysa conferta Moore, 1911 => Paucibranchia conferta (Moore, 1911)
 Marphysa dartevellei Monro, 1936 => Treadwellphysa dartevellei (Monro, 1936)
 Marphysa disjuncta Hartman, 1961 => Paucibranchia disjuncta (Hartman, 1961)
 Marphysa durbanensis Day, 1934 => Marphysa macintoshi Crossland, 1903
 Marphysa escobarae Salazar-Vallejo & Carrera-Parra, 1997 => Marphysa fragilis Treadwell, 1911
 Marphysa fallax Marion & Bobretzky, 1875 => Paucibranchia fallax (Marion & Bobretzky, 1875)
 Marphysa floridana Pourtalès, 1867 => Eunice floridana (Pourtalès, 1867)
 Marphysa gemmata Mohammad, 1973 => Paucibranchia gemmata (Mohammad, 1973)
 Marphysa goodsiri McIntosh, 1885 => Eunice goodsiri (McIntosh, 1885)
 Marphysa haemasoma Quatrefages, 1866 => Marphysa sanguinea (Montagu, 1813)
 Marphysa hentscheli Augener, 1931 => Nicidion hentscheli (Augener, 1931)
 Marphysa iwamushi Izuka, 1907 => Marphysa sanguinea (Montagu, 1813)
 Marphysa kinbergi McIntosh, 1910 => Paucibranchia kinbergi (McIntosh, 1910)
 Marphysa languida Treadwell, 1921 => Treadwellphysa languida (Treadwell, 1921)
 Marphysa leidii Quatrefages, 1866 => Marphysa sanguinea (Montagu, 1813)
 Marphysa longula (Ehlers, 1887) => Nicidion longula (Ehlers, 1887)
 Marphysa mcintoshi [misspelling of macintoshi] => Marphysa macintoshi Crossland, 1903
 Marphysa mixta Fauchald, 1970 => Treadwellphysa mixta (Fauchald, 1970)
 Marphysa parishii Baird, 1869 => Marphysa sanguinea (Montagu, 1813)
 Marphysa purcellana Willey, 1904 => Paucibranchia purcellana (Willey, 1904)
 Marphysa simplex Crossland, 1903 => Marphysa teretiuscula (Schmarda, 1861)
 Marphysa simplex Treadwell, 1922 => Marphysa mossambica (Peters, 1854)
 Marphysa sinensis Monro, 1934 => Paucibranchia sinensis (Monro, 1934)
 Marphysa stragulum (Grube, 1878) => Paucibranchia stragulum (Grube, 1878)
 Marphysa tibiana Pourtalès, 1867 => Eunice tibiana (Pourtalès, 1867)
 Marphysa totospinata Lu & Fauchald, 1998 => Paucibranchia totospinata (Lu & Fauchald, 1998)
 Marphysa veracruzensis de Léon-González & Castañeda, 2006 => Treadwellphysa veracruzensis (de León-González & Castañeda, 2006)

Eunicidae