Photidae er en av tre familier innenfor overfamilien Photoidea i Senticaudata-gruppen av amfipoder.Lowry, J.K. og Myers, A.A., «A Phylogeny and Classification of the Senticaudata subord. nov. (Crustacea: Amphipoda)», i: Zootaxa nr 3610 (1), 2013, side 1-80. Gruppens arter lever som bentiske bunndyr og kjennes fra Gammaridea-arter på avvikende morfologi i halepartiet.
Denne familien består (2013) av i alt 19 slekter med 225 anerkjente arter. De lever bare i havet.
Gruppens taksonomi Gruppen ble beskrevet i 1871. En moderne oppdatering av systematikken gis nedenfor i lys av 2013-revisjonen Lowry, J.K. og Myers, A.A, «A Phylogeny and Classification of the Senticaudata subord. nov. (Crustacea: Amphipoda)», i: Zootaxa nr 3610 (1), 2013, side 1-80. med basis i WoRMS-databasen. - WoRMS. Besøkt 16. mars 2014.
Rekke: KREPSDYR (Crustacea) - 67 000 arter KLASSE storkreps (Malacostraca) - +25 000 arter Latreille, 1802 Underklasse Eumalacostraca Grobben, 1892 Overorden Peracarida Calman, 1904 Orden amfipoder (Amphipoda) - 9 000 arter, 1 900 i ferskvann Latreille, 1816 Underorden Senticaudata - 22 overfamilier, 95 familier Lowry & Myers, 2013 Infraorden Corophiida Parvorden Caprellidira Leach, 1814 (sensu Lowry & Myers, 2013) Overfamilie Photoidea Boeck, 1871 Familie Photidae Boeck, 1871 Slekt Ampelisciphotis Pirlot, 1938 Ampelisciphotis podophthalma (J.L. Barnard, 1958) Ampelisciphotis tridens Pirlot, 1938 Slekt Audulla Chevreux, 1901 Audulla chelifera Chevreux, 1901 Audulla lina Kunkel, 1910 = Audulla chelifera Chevreux, 1901 Audulla semichelatus K.H. Barnard, 1957 = Audulla chelifera Chevreux, 1901 Slekt Corogammaropsis Tzvetkova, 1990 Corogammaropsis kudrjaschovi Tzvetkova, 1990 Slekt Dodophotis G. Karaman, 1985 Dodophotis digitata (K.H. Barnard, 1935) Dodophotis distinguenda (Ruffo, 1955) Slekt Falcigammaropsis Myers, 1995 Falcigammaropsis excavata Myers, 1995 Slekt Gammaropsis Liljeborg, 1855 Underslekt Gammaropsis (Gammaropsis) Gammaropsis (Gammaropsis) bennetti Thurston, 1974 Gammaropsis (Gammaropsis) ctenura (Schellenberg, 1931) Gammaropsis (Gammaropsis) deseadensis Alonso, 1981 Gammaropsis (Gammaropsis) exsertipes Stebbing, 1888 Gammaropsis (Gammaropsis) georgiana (Schellenberg, 1931) Gammaropsis (Gammaropsis) kergueleni (Schellenberg, 1926) Gammaropsis (Gammaropsis) longicornis Walker, 1906 Gammaropsis (Gammaropsis) longitarsus (Schellenberg, 1931) Gammaropsis (Gammaropsis) monodi (Schellenberg, 1931) Gammaropsis (Gammaropsis) purpurescens (K.H. Barnard, 1932) Gammaropsis (Gammaropsis) remipes (K.H. Barnard, 1932) Gammaropsis (Gammaropsis) serricrus (K.H. Barnard, 1932) Gammaropsis (Gammaropsis) triodon (Schellenberg, 1926) Gammaropsis (Gammaropsis) valdiviae (Schellenberg, 1926) Underslekt Gammaropsis (Paranaenia) Gammaropsis (Paranaenia) dentifera (Haswell, 1879) Gammaropsis (Paranaenia) typica (Chilton, 1884) Underslekt Gammaropsis (Pseudeurystheus) Gammaropsis (Pseudeurystheus) sublitoralis (Schellenberg, 1931) Underslekt Gammaropsis (Segamphopus) Gammaropsis (Segamphopus) blaisus (K.H. Barnard, 1932) Gammaropsis (Segamphopus) utinomii (Nagata, 1961) Gammaropsis abyssalis Stephensen, 1944 Gammaropsis aculeata Mateus & Mateus, 1986 Gammaropsis alamoana J.L. Barnard, 1970 Gammaropsis anomala (Chevreux, 1926) Gammaropsis arawakia Thomas & Barnard, 1989 Gammaropsis avera (Reid, 1951) Gammaropsis barnardi Kudrjashov & Vassilenko, 1975 Gammaropsis bispinimanus Bate, 1862 Usikker Gammaropsis chelifera (Chevreux, 1901) Gammaropsis chiltoni (Thomson, 1897) Gammaropsis concava (Shoemaker, 1916) Usikker Gammaropsis cornuta (Norman, 1869) Gammaropsis crassipes (Haswell, 1880) Gammaropsis crenulata Krapp-Schickel & Myers, 1979 Gammaropsis dentata Chevreux, 1900 Gammaropsis denticulata Ledoyer, 1979 Gammaropsis digitata (Schellenberg, 1938) Gammaropsis dilatata Ledoyer, 1979 Gammaropsis dubia (Shoemaker, 1942) Gammaropsis effrena (J.L. Barnard, 1964) Gammaropsis ellisi Conlan, 1983 Gammaropsis emancipata Krapp-Schickel & Myers, 1979 Gammaropsis esturinus Asari, 1998 Gammaropsis gurvitzi (Bulycheva, 1952) Gammaropsis haswelli (Thomson, 1897) Gammaropsis hephaestus Myers, 2009 Gammaropsis hirsutimana (Reid, 1951) Gammaropsis holmesi (Stebbing, 1908) Gammaropsis incideris Lyons & Myers, 1991 Gammaropsis inhaca Griffiths, 1973 Gammaropsis insignis (Chilton, 1925) Gammaropsis japonica (Nagata, 1961) Gammaropsis lacinia Myers, 1995 Gammaropsis laevipalmata Ren, 1992 Gammaropsis latipalma Ledoyer, 1979 Gammaropsis legoliath Hughes & Lowry, 2006 Gammaropsis liuruiyui Ren, 1992 Gammaropsis lobata (Chevreux, 1920) Gammaropsis longicantha (Mateus & Mateus, 1966) Gammaropsis longicarpa Reid, 1951 Gammaropsis longimana (Chilton, 1884) Gammaropsis longipropodi Hirayama, 1984 Gammaropsis lophomeria (K.H. Barnard, 1937) Gammaropsis maculata (Johnston, 1828) Gammaropsis martesia (J.L. Barnard, 1964) Gammaropsis mauritiensis Ledoyer, 1978 Gammaropsis melanops G.O. Sars, 1883 Gammaropsis minuta (Chevreux, 1926) Gammaropsis miri G. Vinogradov, 1994 Gammaropsis mondlanei Ortiz, 1990 Gammaropsis nantis Hirayama, 1984 Gammaropsis nitida (Stimpson, 1853) Gammaropsis ocellata Conlan, 1994 Gammaropsis ostroumowi Sowinski, 1898 Gammaropsis palmata (Stebbing & Robertson, 1891) Gammaropsis palmoides (K.H. Barnard, 1932) Gammaropsis persetosa (Chilton, 1921) Gammaropsis pistoris Krapp-Schickell & Myers, 2006 Gammaropsis pokipoki J.L. Barnard, 1970 Gammaropsis pseudodenticulata Ledoyer, 1979 Gammaropsis pseudostroumowi Ledoyer, 1977 Gammaropsis scissimana (K.H. Barnard, 1926) Usikker Gammaropsis semichelatus (Barnard, 1957) Gammaropsis serratus (Schellenberg, 1925) Gammaropsis setifera (Schellenberg, 1938) Gammaropsis shoemakeri Conlan, 1983 Gammaropsis siara Myers, 1995 Gammaropsis sophiae (Boeck, 1861) Gammaropsis spinosa (Shoemaker, 1942) Gammaropsis sutherlandi Nelson, 1981 Gammaropsis tawahi J.L. Barnard, 1972 Gammaropsis thompsoni (Walker, 1898) Gammaropsis thomsoni Stebbing, 1888 Gammaropsis togoensis (Schellenberg, 1925) Gammaropsis tonichi (J.L. Barnard, 1969) Gammaropsis trispinosus Ren, 2006 Gammaropsis ulrici Krapp-Schickel & Myers, 1979 Gammaropsis insignis Moore, 1988 (temporary name) Gammaropsis afra Stebbing, 1888 = Latigammaropsis afra (Stebbing, 1888) Gammaropsis atlantica Stebbing, 1888 = Latigammaropsis atlantica (Stebbing, 1888) Gammaropsis batei Boeck, 1871 = Gammaropsis nitida (Stimpson, 1853) Gammaropsis caudadentata Norman, 1867 = Gammaropsis nitida (Stimpson, 1853) Gammaropsis concave Shoemaker, 1916 = Gammaropsis thompsoni (Walker, 1898) Gammaropsis erythropthalma Liljeborg, 1855 = Gammaropsis maculata (Johnston, 1828) Gammaropsis gardineri Walker, 1905 = Latigammaropsis atlantica (Stebbing, 1888) Gammaropsis imminens (K.H. Barnard, 1916) = Latigammaropsis atlantica (Stebbing, 1888) Gammaropsis kermadeci Stebbing, 1888 = Podoceropsis kermadeci (Stebbing, 1888) Gammaropsis lindahlii Hansen, 1887 = Podoceropsis lindahlii Hansen, 1888 Gammaropsis lobata Schoemaker, 1942 = Gammaropsis shoemakeri Conlan, 1983 Gammaropsis longicornis Walker, 1906 = Megamphopus longicornis Chevreux, 1911 Gammaropsis megacheir S.I. smith, 1874 = Gammaropsis nitida (Stimpson, 1853) Gammaropsis nana Sars, 1894 = Gammaropsis palmata (Stebbing & Robertson, 1891) Gammaropsis parvus Schellenberg, 1926 = Gammaropsis (Gammaropsis) longicornis Walker, 1906 Gammaropsis pusilla Chevreux, 1926 = Gammaropsis sophiae (Boeck, 1861) Gammaropsis rimapalma Bate, 1862 = Gammaropsis nitida (Stimpson, 1853) Gammaropsis robusta Stout, 1913 = Gammaropsis thompsoni (Walker, 1898) Gammaropsis semidentatus (K.H. Barnard, 1916) = Gammaropsis holmesi (Stebbing, 1908) Gammaropsis tenuicornis Holmes, 1904 = Gammaropsis thompsoni (Walker, 1898) Gammaropsis tridentatus Bate, 1856 = Gammaropsis maculata (Johnston, 1828) Gammaropsis trigonurus Schellenberg, 1926 = Gammaropsis (Gammaropsis) longicornis Walker, 1906 Gammaropsis tuberculosa Bate, 1862 = Gammaropsis nitida (Stimpson, 1853) Gammaropsis undata Bate, 1862 = Gammaropsis sophiae (Boeck, 1861) Gammaropsis zeylanicus Walker, 1904 = Latigammaropsis atlantica (Stebbing, 1888) Slekt Graciliphotis Myers, 2009 Graciliphotis ruthae Myers, 2009 Slekt Latigammaropsis Myers, 2009 Latigammaropsis abbotti (J.L. Barnard, 1965) Latigammaropsis afra (Stebbing, 1888) Latigammaropsis athenae Myers, 2009 Latigammaropsis atlantica (Stebbing, 1888) Latigammaropsis christenseni (Myers, 1995) Latigammaropsis dionysus Myers, 2009 Latigammaropsis gemina (Myers, 1995) Latigammaropsis grandimana (Ledoyer, 1978) Latigammaropsis hermes Myers, 2009 Latigammaropsis hestia Myers, 2009 Latigammaropsis kaumaka (J.L. Barnard, 1970) Latigammaropsis pacifica (Schellenberg, 1938) Latigammaropsis pali (J.L. Barnard, 1970) Latigammaropsis photisimilis (Ruffo, 1969) Latigammaropsis planodentata (Myers, 1995) Latigammaropsis tagoensis (Schellenberg, 1925) Slekt Megamphopus Norman, 1869 Megamphopus angustilobatus Ren, 1991 Megamphopus brevidactylus Myers, 1976 Megamphopus cornutus Norman, 1869 Megamphopus dimorpha (K.H. Barnard, 1932) Megamphopus elephantis (K.H. Barnard, 1932) Megamphopus hainanensis Ren, 2006 Megamphopus katagani Bakir, Sezgin & Myers, 2011 Megamphopus longicornis Chevreux, 1911 Megamphopus longidactyla Chevreux, 1926 Megamphopus mamola J.L. Barnard, 1962 Megamphopus pachypa Schellenberg, 1925 Megamphopus raptor Myers, 1998 Megamphopus robustisetae Souza-Filho & Senna, 2012 Megamphopus intermedia Stebbing, 1878 = Megamphopus cornutus Norman, 1869 Megamphopus longimana Boeck, 1871 = Megamphopus cornutus Norman, 1869 Slekt Microphotis Ruffo, 1952 Microphotis blachei Ruffo, 1952 Slekt Papuaphotis Myers, 1995 Papuaphotis regis Myers, 1995 Slekt Paranaenia Chilton, 1884 Paranaenia angolensis (Schellenberg, 1925) Paranaenia dentifera (Haswell, 1879) Paranaenia typica Chilton, 1884 Slekt Photis Krøyer, 1842 Photis aequimanus Schellenberg, 1925 Photis africana Schellenberg, 1925 Photis aina J.L. Barnard, 1970 Photis albus Budnikova, 1985 Photis angustimanus Ren, 2006 Photis antennata Chevreux, 1926 Photis ariakensis (Hirayama, 1984) Photis baeckmannae Gurjanova, 1951 Photis beringiensis Tzvetkova, 1980 Photis bifurcata J.L. Barnard, 1962 Photis brevicaudatus (Norman, 1867) Photis brevipes Shoemaker, 1942 Photis californica Stout, 1913 Photis cavimana Ledoyer, 1979 Photis chiconola J.L. Barnard, 1964 Photis coeca J.L. Barnard, 1962 Photis conchicola Alderman, 1936 Photis davei Myers, 2009 Photis dentata Shoemaker, 1945 Photis dolichommata Stebbing, 1910 Photis elephantis J.L. Barnard, 1962 Photis fischmanni Gurjanova, 1951 Photis goreensis Schellenberg, 1925 Photis hawaiensis J.L. Barnard, 1955 Photis inornatus Myers, Rigolet, Thiébaut & Dubois, 2012 Photis japonica Hirayama, 1984 Photis kapapa J.L. Barnard, 1970 Photis kurilica Gurjanova, 1955 Photis lacia J.L. Barnard, 1962 Photis lamellifera Schellenberg, 1928 Photis lamina Hirayama, 1984 Photis lecroyae Ortiz, Varela & Lalana, 2011 Photis linearmanus Conlan, 1994 Photis longicaudata (Bate & Westwood, 1862) Photis longidactyla Griffiths, 1974 Photis longimana Walker, 1904 Photis longipes (Della Valle, 1893) Photis macinerneyi Conlan, 1983 Photis macrocarpa Stebbing, 1888 Photis macromana McKinney, Kalke & Holland, 1978 Photis macrotica J.L. Barnard, 1962 Photis malinalco J.L. Barnard, 1967 Photis melanica McKinney, 1980 Photis nana (Walker, 1904) Photis nataliae Bulycheva, 1952 Photis nigricola Lowry, 1979 Photis obesa Chevreux, 1926 Photis oligochaeta Conlan, 1983 Photis pachydactyla Conlan, 1983 Photis paeowai Myers, 1995 Photis parvidons Conlan, 1983 Photis phaeocula Lowry, 1979 Photis pirloti Myers, 1985 Photis pollex Walker, 1895 Photis producta (Stimpson, 1856) Photis pugnator Shoemaker, 1945