| Palaeagapetus finisorientis L Botosanean..., 1987 | |
| Palaeagapetus flexus T Ito, 1991 | |
| Palaeagapetus fukuiensis T Ito, 2010 | |
| Palaeagapetus kyushuensis T Ito & N Ku..., 1997 | |
| Palaeagapetus ovatus T Ito & T Ha..., 1986 | |
| Palaeagapetus parvus T Ito, 1992 | |
| Palaeagapetus shikokuensis Y Utsunomiya..., 1997 | |
| Ptilocolepus atiloma F Schmid, 1991 | |
| Ptilocolepus colchicus AV Martynov, 1913 | |
| Ptilocolepus dilatatus AV Martynov, 1913 | |
| Ptilocolepus dilatatus minor Martynov, 1913 | |
| Ptilocolepus extensus R McLachlan, 1884 | Coast wallflower |
| Ptilocolepus granulatus F.J. Pictet, 1834 | |
| Ptilocolepus namnao H Malicky & ..., 1996 | |
| Ptilocolepus villosus L Navas, 1916 | |
| Rhyacophila (Doliocypta) argentipunctella DE Kimmins, 1955 | |
| Rhyacophila (Doliocypta) producta R McLachlan, 1879 | Wallflower |
| Rhyacophila (Doliocypta) scissa KJ Morton, 1900 | Threebract loosestrife |
| Rhyacophila scissa niyampa Schmid, 1970 | |
| Rhyacophila (Hyperrhyacophila) albardana R McLachlan, 1879 | Wallflower |
| Rhyacophila (Hyperrhyacophila) evoluta R McLachlan, 1879 | Wallflower |
| Rhyacophila (Hyperrhyacophila) mocsaryi F Klapalek, 1898 | Florida loosestrife |
| Rhyacophila mocsaryi tredosensis Schmid, 1952 | |
| Rhyacophila (Hyperrhyacophila) occidentalis R McLachlan, 1879 | Wallflower |
| Rhyacophila (Hyperrhyacophila) torrentium FJ Pictet, 1834 | |
| Rhyacophila (Hyporhyacophila) aquitanica R McLachlan, 1879 | Wallflower |
| Rhyacophila aquitanica carpathica Botosaneanu, 1995 | |
| Rhyacophila (Hyporhyacophila) eatoni R McLachlan, 1879 | Wallflower |
| Rhyacophila (Hyporhyacophila) glareosa R McLachlan, 1867 | |
| Rhyacophila (Hyporhyacophila) philopotamoides R McLachlan, 1879 | Threebract loosestrife |
| Rhyacophila philopotamoides centralis Schmid, 1970 | |
| Rhyacophila philopotamoides orientalis Schmid, 1970 | |
| Rhyacophila (Hyporhyacophila) pubescens FJ Pictet, 1834 | |
| Rhyacophila (Hyporhyacophila) tristis FJ Pictet, 1834 | |
| Rhyacophila (Hyporhyacophila) vandeli R Despax, 1933 | |
| Rhyacophila (Metarhyacophila) meyeri R McLachlan, 1879 | Wallflower |
| Rhyacophila (Pararhyacophila) intermedia R McLachlan, 1868 | |
| Rhyacophila (Pararhyacophila) munda R McLachlan, 1862 | |
| Rhyacophila munda oreina Navas, 1936 | |
| Rhyacophila (Pararhyacophila) rupta R McLachlan, 1879 | Wallflower |
| Rhyacophila rupta erkakanae Sipahiler, 1993 | |
| Rhyacophila (Prosrhyacophila) laevis FJ Pictet, 1834 | |
| Rhyacophila laevis slovenica Sykora, 1963 | |
| Rhyacophila (Rhyacophila) adjuncta R McLachlan, 1884 | Coast wallflower |
| Rhyacophila (Rhyacophila) anatina KJ Morton, 1900 | |
| Rhyacophila (Rhyacophila) aurata Brauer, 1857 | |
| Rhyacophila (Rhyacophila) dorsalis J. Curtis, 1834 | Sandfly |
| Rhyacophila dorsalis acutidens McLachlan, 1879 | |
| Rhyacophila dorsalis subacutidens (Moretti, 1994) | ⇒ Rhyacophila dorsalis acutidens McLachlan, 1879 |
| Rhyacophila (Rhyacophila) falcifera F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila (Rhyacophila) fasciata HA Hagen, 1859 | Wallflower |
| Rhyacophila fasciata aliena Martynov, 1916 | |
| Rhyacophila fasciata denticulata McLachlan, 1879 | |
| Rhyacophila fasciata kykladica Malicky & Si..., 1993 | |
| Rhyacophila fasciata libanica Malicky & Si..., 1993 | |
| Rhyacophila fasciata mysica Malicky & Si..., 1993 | |
| Rhyacophila (Rhyacophila) fuscula Walker, 1852 | |
| Rhyacophila (Rhyacophila) lusitanica R McLachlan, 1884 | Coast wallflower |
| Rhyacophila (Rhyacophila) martynovi Mosely, 1930 | |
| Rhyacophila martynovi tetensis Sipahiler, 1993 | |
| Rhyacophila (Rhyacophila) nubila JW Zetterstedt, 1840 | Lighthouse flaxflower |
| Rhyacophila (Rhyacophila) obliterata R McLachlan, 1863 | |
| Rhyacophila (Rhyacophila) pascoei R McLachlan, 1879 | Wallflower |
| Rhyacophila (Rhyacophila) praemorsa R McLachlan, 1879 | Wallflower |
| Rhyacophila (Rhyacophila) rectispina R McLachlan, 1884 | Coast wallflower |
| Rhyacophila (Rhyacophila) relicta R McLachlan, 1879 | Wallflower |
| Rhyacophila (Rhyacophila) rougemonti R McLachlan, 1880 | |
| Rhyacophila rougemonti sicula Morton, 1906 | |
| Rhyacophila (Rhyacophila) simulatrix R McLachlan, 1879 | Wallflower |
| Rhyacophila simulatrix vinconi Sipahiler, 1993 | |
| Rhyacophila (Rhyacophila) trifasciata Mosely, 1930 | |
| Rhyacophila (Rhyacophila) vulgaris (FJ Pictet, 1834) | ⇒ Rhyacophila dorsalis J. Curtis, 1834 |
| Rhyacophila vulgaris hartigi Malicky, 1971 | |
| Rhyacophila (Trichophila) articulata KJ Morton, 1900 | |
| Rhyacophila (Trichophila) cameroni Banks, 1931 | |
| Rhyacophila (Trichophila) curvata KJ Morton, 1900 | |
| Rhyacophila (Trichophila) hingstoni AV Martynov, 1930 | |
| Rhyacophila (Trichophila) hobsoni AV Martynov, 1930 | |
| Rhyacophila (Trichophila) mishmica DE Kimmins, 1953 | Bitter root |
| Rhyacophila (Trichophila) mortoni (DE Kimmins, 1953) | ⇒ Rhyacophila curvata KJ Morton, 1900 |
| Rhyacophila (Trichophila) parva DE Kimmins, 1953 | Bitter root |
| Rhyacophila parva mukpo Schmid, 1970 | |
| Rhyacophila (Trichophila) perdita Banks, 1938 | |
| Rhyacophila (Trichophila) putata DE Kimmins, 1953 | Bitter root |
| Rhyacophila putata temba Schmid, 1970 | |
| Rhyacophila (Trichophila) scotina DE Kimmins, 1953 | Bitter root |
| Rhyacophila abchasica AV Martynov, 1934 | James' clammyweed |
| Rhyacophila aberrans AV Martynov, 1913 | |
| Rhyacophila abida H Malicky, 2009 | |
| Rhyacophila acanthoida | |
| Rhyacophila acraliodonta C Sun, 1995 | |
| Rhyacophila ainola H Malicky, 1989 | |
| Rhyacophila aithra H Malicky, 1997 | |
| Rhyacophila alaplica F Sipahiler, 2013 | |
| Rhyacophila alpina (Vaillant, 1968) | ⇒ Rhyacophila bonaparti F Schmid, 1947 |
| Rhyacophila alticola DE Kimmins, 1953 | Bitter root |
| Rhyacophila altoincisiva C Hwang, 1957 | |
| Rhyacophila amasarica W Mey, 1994 | |
| Rhyacophila amblyodonta C Sun & L Yang, 1999 | |
| Rhyacophila amoyanensis W Mey, 2011 | |
| Rhyacophila anakbatukau H Malicky, 1995 | |
| Rhyacophila anakbuah H Malicky, 1995 | |
| Rhyacophila anakdjeram H Malicky, 1995 | |
| Rhyacophila anaksungai H Malicky, 1995 | |
| Rhyacophila anaktiongkok H Malicky, 1995 | |
| Rhyacophila ancestralis AV Martynov, 1935 | |
| Rhyacophila angden F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila angelieri H Decamps, 1965 | |
| Rhyacophila angulata AV Martynov, 1910 | |
| Rhyacophila annulicornis DE Kimmins, 1953 | Bitter root |
| Rhyacophila antiope H Malicky, 1997 | |
| Rhyacophila aphrodite H Malicky, 1975 | |
| Rhyacophila apicalis DE Kimmins, 1953 | Bitter root |
| Rhyacophila appennina R McLachlan, 1898 | |
| Rhyacophila arcangelina L Navas, 1932 | |
| Rhyacophila arefinae J Olah & H M..., 2010 | |
| Rhyacophila arefini TI Lukyanchenko, 1993 | |
| Rhyacophila arhaviensis F Sipahiler, 1986 | |
| Rhyacophila armeniaca FE Guerin-Me..., 1844 | Grass fern |
| Rhyacophila armitagei J Olah & H M..., 2010 | |
| Rhyacophila armitageorum MS Saini & K..., 2012 | |
| Rhyacophila arties F Sipahiler, 2000 | |
| Rhyacophila asahiensis M Kobayashi, 1976 | |
| Rhyacophila assimilis DE Kimmins, 1953 | Bitter root |
| Rhyacophila asymmetra | |
| Rhyacophila atomaria L Navas, 1936 | |
| Rhyacophila aureomaculata F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila aureostigma F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila auricula H Malicky & ..., 2002 | |
| Rhyacophila avicularis DE Kimmins, 1953 | Bitter root |
| Rhyacophila azumaensis M Kobayashi, 1973 | |
| Rhyacophila bacurianica SG Lepneva, 1961 | |
| Rhyacophila baibarana S Matsumura, 1931 | |
| Rhyacophila bakurianica SG Lepneva, 1961 | |
| Rhyacophila balangshana H Malicky, 1995 | |
| Rhyacophila balcanica M Radovanovic, 1953 | |
| Rhyacophila baldensis W Mey, 2011 | |
| Rhyacophila banahawmontis W Mey, 2011 | |
| Rhyacophila banra J Olah, 1987 | |
| Rhyacophila benoham H Malicky, 2014 | |
| Rhyacophila bhotia F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila bhuchanadhara F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila bicolor DE Kimmins, 1953 | Bitter root |
| Rhyacophila bicolor doiangka Malicky, 1999 | |
| Rhyacophila bicostata C Sun & L Yang, 1995 | |
| Rhyacophila bidens DE Kimmins, 1953 | Bitter root |
| Rhyacophila biegelmeieri H Malicky, 1984 | |
| Rhyacophila bifida DE Kimmins, 1953 | Bitter root |
| Rhyacophila bilobata Ulmer, 1907 | Dill |
| Rhyacophila bintil J Huisman & ..., 2011 | |
| Rhyacophila bisbifida | |
| Rhyacophila bivitta C Sun, 1997 | |
| Rhyacophila blenda H Malicky & ..., 1993 | |
| Rhyacophila boleta H Malicky & ..., 2002 | |
| Rhyacophila bonaparti F Schmid, 1947 | |
| Rhyacophila borcka F Sipahiler, 1996 | |
| Rhyacophila bosnica F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila braaschi H Malicky & ..., 1976 | |
| Rhyacophila brachyblasta H Malicky & ..., 2002 | |
| Rhyacophila brechlini W Mey, 1998 | |
| Rhyacophila brevicephala M Iwata, 1927 | Bahama flatcoil |
| Rhyacophila brevifurcata K Kumanski, 1985 | |
| Rhyacophila bucina H Malicky & ..., 2002 | |
| Rhyacophila burmana DE Kimmins, 1953 | Bitter root |
| Rhyacophila camiliensis F Sipahiler, 2013 | |
| Rhyacophila castanea HA Hagen, 1858 | |
| Rhyacophila cataractae W Mey, 1998 | |
| Rhyacophila caussica F Vaillant, 1967 | |
| Rhyacophila cedrensis F Schmid, 1993 | |
| Rhyacophila celata C Sun & L Yang, 1999 | |
| Rhyacophila chakungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chamolungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chandragoupta F Schmid, 1959 | |
| Rhyacophila chandzo F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila changpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chayulpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chayulpa ringmo Schmid, 1970 | |
| Rhyacophila chayulpa tsetangpa Schmid, 1970 | |
| Rhyacophila chematangpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chembo F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chembo lartsepa Schmid, 1970 | |
| Rhyacophila chenmo F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chimdro F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chirka F Schmid, 1993 | |
| Rhyacophila chitre SI Melnitsky, 2005 | |
| Rhyacophila chomoyuma F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila choprai AV Martynov, 1935 | |
| Rhyacophila chugalungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chulukpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chumikpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila chungse F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila churongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila cibinensis L Botosanean..., 1967 | |
| Rhyacophila clara T Hattori & ..., 2007 | |
| Rhyacophila clavalis AV Martynov, 1913 | |
| Rhyacophila claviforma C Sun & L Yang, 1998 | |
| Rhyacophila clemens M Tsuda, 1940 | |
| Rhyacophila coalita Sun, 2016 | |
| Rhyacophila coclearis LP Hsu & CS ..., 1996 | |
| Rhyacophila coloradensis Banks, 1904 | |
| Rhyacophila complanata L Tian & Y Li, 1986 | |
| Rhyacophila complanatula H Malicky & ..., 2002 | |
| Rhyacophila confinium L Botosaneanu, 1957 | |
| Rhyacophila confissa L Botosaneanu, 1970 | |
| Rhyacophila contorta C Sun & L Yang, 1995 | |
| Rhyacophila cordilliera W Mey, 2011 | |
| Rhyacophila coreana M Tsuda, 1940 | |
| Rhyacophila cornuta DE Kimmins, 1953 | Bitter root |
| Rhyacophila crassa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila crispa C Sun & L Yang, 1998 | |
| Rhyacophila cruciata KH Forsslund, 1935 | |
| Rhyacophila cuneata C Sun & L Yang, 1999 | |
| Rhyacophila cupressorum AV Martynov, 1913 | |
| Rhyacophila curriei BJ Armitage ..., 2003 | |
| Rhyacophila curtior F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila dactyloidis C Sun & L Yang, 1995 | |
| Rhyacophila dafla F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila dakshi F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila davao HH Ross, 1950 | |
| Rhyacophila delphinensis (Vaillant, 1968) | ⇒ Rhyacophila praemorsa R McLachlan, 1879 |
| Rhyacophila dentalis | |
| Rhyacophila denticulifera K Kumanski, 1985 | |
| Rhyacophila depressa AV Martynov, 1910 | |
| Rhyacophila dgaldanpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila diakoftensis H Malicky, 1983 | |
| Rhyacophila diffidens M Tsuda, 1940 | |
| Rhyacophila dikkaravasini F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila dilatata AV Martynov, 1935 | |
| Rhyacophila dirangpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila discoidalis DE Kimmins, 1953 | Bitter root |
| Rhyacophila divaricata DE Kimmins, 1953 | Bitter root |
| Rhyacophila doehleri L Botosaneanu, 1957 | |
| Rhyacophila dolingpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila dolokana H Malicky, 1978 | |
| Rhyacophila dongkyapa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila dongre F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila donoana H Malicky, 1978 | |
| Rhyacophila dorje F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila drokpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila drokpa gurla Schmid, 1970 | |
| Rhyacophila drokpa nyenpa Schmid, 1970 | |
| Rhyacophila drosampa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila drotangpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila dumogana A Neboiss & ..., 1988 | |
| Rhyacophila egijnica F Schmid, 1968 | Spatulaleaf loosestrife |
| Rhyacophila elongata DE Kimmins, 1953 | Bitter root |
| Rhyacophila esorima W Mey, 1996 | |
| Rhyacophila euphorbos H Malicky & ..., 2002 | |
| Rhyacophila euryphylla C Sun & L Yang, 1999 | |
| Rhyacophila eurystheus H Malicky & ..., 2002 | |
| Rhyacophila euterpe H Malicky & ..., 2002 | |
| Rhyacophila excavata AV Martynov, 1909 | Redwhisker clammyweed |
| Rhyacophila exilis C Sun & L Yang, 1999 | |
| Rhyacophila extensa AV Martynov, 1928 | |
| Rhyacophila fagarashiensis L Botosaneanu, 1964 | |
| Rhyacophila falita HH Ross, 1956 | Green wild indigo |
| Rhyacophila fanjingshanensis H Malicky & ..., 2002 | |
| Rhyacophila fansipana W Mey, 1998 | |
| Rhyacophila farkasi O Kiss, 2013 | |
| Rhyacophila fernandi BJ Armitage ..., 2003 | |
| Rhyacophila fides H Malicky & ..., 2002 | |
| Rhyacophila fischeri L Botosaneanu, 1957 | |
| Rhyacophila flava F Klapalek, 1898 | |
| Rhyacophila flaviventris DE Kimmins, 1953 | Bitter root |
| Rhyacophila fletcheri DE Kimmins, 1952 | |
| Rhyacophila flinti F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila flora H Malicky & ..., 2002 | |
| Rhyacophila foliacea GP Moretti, 1981 | |
| Rhyacophila forcipata H Malicky & ..., 2002 | |
| Rhyacophila forcipulata AV Martynov, 1926 | |
| Rhyacophila formosae M Iwata, 1928 | |
| Rhyacophila formosana Ulmer, 1927 | |
| Rhyacophila fragariae H Malicky, 1976 | |
| Rhyacophila fragilis (W Mey, 2011) | ⇒ Phoupanpsyche caroli H Malicky, 2008 |
| Rhyacophila furca C Hwang & L ..., 1982 | |
| Rhyacophila furcata (C Hwang, 1957) | ⇒ Rhyacophila flava F Klapalek, 1898 |
| Rhyacophila furcifera F Klapalek, 1904 | |
| Rhyacophila furva H Malicky & ..., 2002 | |
| Rhyacophila gadingensis W Mey, 2011 | |
| Rhyacophila gelukpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila geminispina | |
| Rhyacophila germana L Navas, 1923 | Sea-milkwort |
| Rhyacophila gorgitensis F Sipahiler, 1997 | |
| Rhyacophila grahami Banks, 1940 | |
| Rhyacophila gudrunae H Malicky, 1972 | |
| Rhyacophila gyaldzen F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila gyamo F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila gyaspa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila gyelbu F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila hadestril H Malicky & ..., 2002 | |
| Rhyacophila hamata T Hattori & ..., 2007 | |
| Rhyacophila hamifera DE Kimmins, 1953 | Bitter root |
| Rhyacophila hamosa C Sun, 1995 | |
| Rhyacophila hangnia J Olah, 1987 | |
| Rhyacophila haplostephana C Sun & L Yang, 1998 | |
| Rhyacophila hayachiensis Kobayashi, 1976 | |
| Rhyacophila hayachinensis M Kobayashi, 1976 | |
| Rhyacophila hayakawai M Kobayashi, 1969 | |
| Rhyacophila heliada H Malicky & ..., 2004 | |
| Rhyacophila hippocrepica (C Sun & L Yang, 1995) | ⇒ Rhyacophila malayana Banks, 1931 |
| Rhyacophila hira H Malicky & ..., 2009 | |
| Rhyacophila hirticornis R McLachlan, 1879 | Wallflower |
| Rhyacophila hoabinha J Olah, 1987 | |
| Rhyacophila hoangliensis W Mey, 1998 | |
| Rhyacophila hokkaidensis M Iwata, 1927 | Bahama flatcoil |
| Rhyacophila hollosii O Kiss, 2011 | |
| Rhyacophila horvathmargiti O Kiss, 2011 | |
| Rhyacophila hreblayi O Kiss, 2003 | |
| Rhyacophila huesunensis | |
| Rhyacophila hydaspica F Schmid, 1959 | |
| Rhyacophila imitabilis TI Arefina, 1993 | |
| Rhyacophila immaculata W Mey, 1996 | |
| Rhyacophila impar AV Martynov, 1914 | Rio Grande clammyweed |
| Rhyacophila implicata TI Arefina, 1993 | |
| Rhyacophila inaequalis DG Denning &..., 1971 | |
| Rhyacophila inconspicua KJ Morton, 1900 | |
| Rhyacophila incudis W Mey, 1996 | |
| Rhyacophila ishihanaensis M Kobayashi, 1984 | |
| Rhyacophila isolata Banks, 1934 | |
| Rhyacophila isparta F Sipahiler, 1996 | |
| Rhyacophila italica GP Moretti, 1981 | |
| Rhyacophila italica ilvana Moretti, 1981 | |
| Rhyacophila itoi M Tsuda & T ..., 1967 | |
| Rhyacophila ivrizica F Sipahiler, 2007 | |
| Rhyacophila janosi J Olah, 1987 | |
| Rhyacophila javana Ulmer, 1951 | |
| Rhyacophila jayadurga F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila jigme F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila jirisana M Kobayashi, 1989 | |
| Rhyacophila joani F Sipahiler, 2000 | |
| Rhyacophila joosti W Mey, 1979 | |
| Rhyacophila kadampa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kadaphes F Schmid, 1959 | |
| Rhyacophila kadphises F Schmid, 1959 | |
| Rhyacophila kagyupa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kaltatica IM Levanidov..., 1977 | |
| Rhyacophila kando F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kando rengma Schmid, 1970 | |
| Rhyacophila kangjongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kanichka F Schmid, 1959 | |
| Rhyacophila kaohsiungensis Hsu & Chen, 2003 | |
| Rhyacophila kardakoffi L Navas, 1926 | Fringed loosestrife |
| Rhyacophila karpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kashongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kawachenpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kawamurae (M Tsuda, 1940) | ⇒ Rhyacophila manuleata AV Martynov, 1934 |
| Rhyacophila kawaraboensis M Kobayashi, 1976 | |
| Rhyacophila kedara F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kelnerae F Schmid, 1971 | |
| Rhyacophila khamakhya F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila khasiorum F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila khimbarpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila khiympa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kimminsi (HH Ross, 1956) | ⇒ Rhyacophila kimminsiana L Botosaneanu, 1958 |
| Rhyacophila kimminsiana L Botosaneanu, 1958 | |
| Rhyacophila kinabaluensis W Mey, 2011 | |
| Rhyacophila kisoensis M Tsuda, 1940 | |
| Rhyacophila kisszoltani O Kiss, 2013 | |
| Rhyacophila kiyosumiensis RB Kuranishi, 1990 | |
| Rhyacophila kiyrongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kohnoae HH Ross, 1956 | Green wild indigo |
| Rhyacophila kolymensis TI Arefina, 1993 | |
| Rhyacophila kownackiana B Szczesny, 1970 | |
| Rhyacophila krauskasseggae H Malicky, 1978 | |
| Rhyacophila kubra F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kuku J Huisman & ..., 2011 | |
| Rhyacophila kumanskii Z Spuris, 1988 | |
| Rhyacophila kumgangsanica K Kumanski, 1990 | |
| Rhyacophila kunma F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kuramana M Tsuda, 1942 | |
| Rhyacophila kusang F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kuwayamai F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kyadongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kyimdongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila kyungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila labeculata DE Kimmins, 1953 | Bitter root |
| Rhyacophila ladam J Huisman & ..., 2011 | |
| Rhyacophila lakatosi O Kiss, 2011 | |
| Rhyacophila lambakanta F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila lamdonga J Olah & H M..., 2010 | |
| Rhyacophila langanana W Mey, 2011 | |
| Rhyacophila langdarma F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila langkawia VD Ivanov & ..., 2013 | |
| Rhyacophila laocai BJ Armitage ..., 2003 | |
| Rhyacophila laptsapa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila lata AV Martynov, 1918 | |
| Rhyacophila laufferi L Navas, 1918 | |
| Rhyacophila laylahel H Malicky, 2014 | |
| Rhyacophila ledra HH Ross, 1939 | Gopherweed |
| Rhyacophila lenae AV Martynov, 1910 | |
| Rhyacophila lepcha F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila lepnevae (IM Levanidova, 1977) | ⇒ Rhyacophila kumanskii Z Spuris, 1988 |
| Rhyacophila lepoh J Huisman & ..., 2011 | |
| Rhyacophila lezeyi L Navas, 1933 | |
| Rhyacophila lhabu F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila lhadzongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila lhakpa Schmid, 1970 | Threebract loosestrife |
| Rhyacophila lhopa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila lieftincki Ulmer, 1951 | |
| Rhyacophila ligifera DE Kimmins, 1953 | Bitter root |
| Rhyacophila ligulula H Malicky & ..., 2002 | |
| Rhyacophila liliputana Banks, 1939 | |
| Rhyacophila lobsang F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila longicuspis C Sun, 1995 | |
| Rhyacophila longistyla C Sun & L Yang, 1995 | |
| Rhyacophila lonpo F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila loxias F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila lyssa H Malicky & ..., 2004 | |
| Rhyacophila macrorrhiza C Sun & L Yang, 1995 | |
| Rhyacophila madalensis LP Hsu & CS ..., 1996 | |
| Rhyacophila magnahamata LP Hsu & CS ..., 1996 | |
| Rhyacophila mahunkai J Olah, 1987 | |
| Rhyacophila mainensis Banks, 1911 | |
| Rhyacophila maitripa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila makiensis M Kobayashi, 1987 | |
| Rhyacophila malayana Banks, 1931 | |
| Rhyacophila malickyi W Mey, 2011 | |
| Rhyacophila manicata DE Kimmins, 1953 | Bitter root |
| Rhyacophila manipuri F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila manlungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila manna H Malicky & ..., 1993 | |
| Rhyacophila manuleata AV Martynov, 1934 | James' clammyweed |
| Rhyacophila marcida Banks, 1947 | |
| Rhyacophila maritima IM Levanidova, 1977 | |
| Rhyacophila marpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila masula J Olah, 2010 | |
| Rhyacophila matanyii (Kiss, 2013) | ⇒ Rhyacophila flora H Malicky & ..., 2002 |
| Rhyacophila mayaensis M Kobayashi, 1973 | |
| Rhyacophila mayestril H Malicky, 1992 | |
| Rhyacophila melanippe H Malicky, 2007 | |
| Rhyacophila melli Ulmer, 1926 | Bur chervil |
| Rhyacophila melpomene H Malicky, 1976 | |
| Rhyacophila merangirana (H Malicky, 1978) | ⇒ Rhyacophila dolokana H Malicky, 1978 |
| Rhyacophila meridionalis E Pictet, 1865 | |
| Rhyacophila metakanta | |
| Rhyacophila meyi BJ Armitage ..., 2003 | |
| Rhyacophila milarepa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila mimiclaviforma C Sun & L Yang, 1998 | |
| Rhyacophila minoyamaensis M Kobayashi, 1973 | |
| Rhyacophila minuta Banks, 1939 | |
| Rhyacophila mirabilis IM Levanidov..., 1977 | |
| Rhyacophila mjohjangsanica L Botosaneanu, 1970 | |
| Rhyacophila mnemosyne H Malicky, 2007 | |
| Rhyacophila moneta H Malicky & ..., 2004 | |
| Rhyacophila mongolica IM Levanidova, 1993 | |
| Rhyacophila monstrosa IM Levanidov..., 1977 | |
| Rhyacophila monyulpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila morettina L Botosaneanu, 1980 | |
| Rhyacophila morsei H Malicky & ..., 2002 | |
| Rhyacophila motakanta F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila motasi L Botosaneanu, 1957 | |
| Rhyacophila mroczkowskii L Botosaneanu, 1970 | |
| Rhyacophila muktepa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila multispinomera C Sun & L Yang, 1998 | |
| Rhyacophila murhu H Malicky & ..., 1989 | |
| Rhyacophila myrmidone H Malicky & ..., 2004 | |
| Rhyacophila nabochepa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila naga F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila nagaokaensis M Kobayashi, 1976 | |
| Rhyacophila nagongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila nakagawai M Kobayashi, 1969 | |
| Rhyacophila nakpo F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila namgyal F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila nana IM Levanidova, 1993 | |
| Rhyacophila nandori O Kiss, 2003 | |
| Rhyacophila nanpingensis C Sun & L Yang, 1998 | |
| Rhyacophila narayani F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila narvae L Navas, 1926 | Fringed loosestrife |
| Rhyacophila naviculata KJ Morton, 1900 | |
| Rhyacophila nebajoth H Malicky, 2012 | |
| Rhyacophila negrosana W Mey, 1998 | |
| Rhyacophila nephroida C Sun & L Yang, 1998 | |
| Rhyacophila netongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila nevada F Schmid, 1952 | Florida loosestrife |
| Rhyacophila ngawang F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila ngorpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila ngulpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila nigra AV Martynov, 1930 | |
| Rhyacophila nigrocephala M Iwata, 1927 | Bahama flatcoil |
| Rhyacophila nigrorosea F Schmid, 1959 | |
| Rhyacophila niizakiensis M Kobayashi, 1976 | |
| Rhyacophila nipponica L Navas, 1933 | |
| Rhyacophila niwae (M Iwata, 1927) | ⇒ Rhyacophila bilobata Ulmer, 1907 |
| Rhyacophila noeibia H Malicky & ..., 1993 | |
| Rhyacophila norbu F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila nyamangpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila nyelungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila nyerongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila nyerpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila nyukmadongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila obelix H Malicky, 1979 | |
| Rhyacophila obscura AV Martynov, 1927 | Large clammyweed |
| Rhyacophila obtusa F Klapalek, 1894 | |
| Rhyacophila okuihana W Mey, 1996 | |
| Rhyacophila olahi BJ Armitage ..., 2003 | |
| Rhyacophila orghidani L Botosaneanu, 1952 | |
| Rhyacophila orientalis (DE Kimmins, 1953) | ⇒ Rhyacophila philopotamoides R McLachlan, 1879 |
| Rhyacophila orobica GP Moretti, 1991 | |
| Rhyacophila orthacantha J Emoto, 1979 | |
| Rhyacophila osellai H Malicky, 1981 | |
| Rhyacophila pacata M Tsuda, 1940 | |
| Rhyacophila pallida (Mosely, 1930) | ⇒ Himalopsyche horai AV Martynov, 1936 |
| Rhyacophila palmeni R McLachlan, 1879 | Wallflower |
| Rhyacophila paratecta W Mey, 1996 | |
| Rhyacophila parilis W Mey, 1998 | |
| Rhyacophila paurava F Schmid, 1959 | |
| Rhyacophila pelopeia H Malicky & ..., 2004 | |
| Rhyacophila pemba F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila pendayica H Malicky, 1975 | |
| Rhyacophila pentagona H Malicky & ..., 2002 | |
| Rhyacophila pepingensis Ulmer, 1932 | |
| Rhyacophila peripenis C Sun & L Yang, 1998 | |
| Rhyacophila petersorum F Schmid & D..., 1971 | |
| Rhyacophila pieli L Navas, 1933 | |
| Rhyacophila pilifera W Mey, 2011 | |
| Rhyacophila pirinica K Kumanski, 1980 | |
| Rhyacophila poba F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila polha F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila polonica R McLachlan, 1879 | Wallflower |
| Rhyacophila pongensis F Sipahiler, 2000 | |
| Rhyacophila porntipae H Malicky, 1987 | |
| Rhyacophila procliva DE Kimmins, 1953 | Bitter root |
| Rhyacophila pseudotristis K Kumanski, 1987 | |
| Rhyacophila pulchra F Schmid, 1952 | Florida loosestrife |
| Rhyacophila pusilla H Malicky & ..., 2002 | |
| Rhyacophila pyrrha H Malicky, 2007 | |
| Rhyacophila quadrifida C Sun & L Yang, 1995 | |
| Rhyacophila quana (H Malicky & ..., 1989) | ⇒ Rhyacophila malayana Banks, 1931 |
| Rhyacophila ramingwongi H Malicky, 1987 | |
| Rhyacophila ramulina H Malicky & ..., 2002 | |
| Rhyacophila ranga J Olah, 1987 | |
| Rhyacophila ravizzai GP Moretti, 1991 | |
| Rhyacophila relegata F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila remingtoni (Ross, 1956) | ⇒ Rhyacophila shikotsuensis M Iwata, 1927 |
| Rhyacophila retracta AV Martynov, 1914 | Rio Grande clammyweed |
| Rhyacophila rhombica AV Martynov, 1935 | |
| Rhyacophila riedeliana L Botosaneanu, 1970 | |
| Rhyacophila rima C Sun & L Yang, 1995 | |
| Rhyacophila robusta F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila rongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila ructicna H Malicky, 1993 | |
| Rhyacophila sajadi MS Saini & K..., 2012 | |
| Rhyacophila sakyapa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila sandalphon H Malicky, 2014 | |
| Rhyacophila sanglungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila satoi RB Kuranishi, 1997 | |
| Rhyacophila sauwana H Malicky, 1995 | |
| Rhyacophila schismatica C Sun & L Yang, 1995 | |
| Rhyacophila schmidi HH Ross, 1969 | |
| Rhyacophila schmidinarica Urbanic, Kru..., 2000 | |
| Rhyacophila schmidirossia VD Ivanov & ..., 2013 | |
| Rhyacophila scissoides DE Kimmins, 1953 | Bitter root |
| Rhyacophila scissoides thailandica Schmid, 1970 | |
| Rhyacophila senggepa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila serug H Malicky, 2012 | |
| Rhyacophila shaanxiensis H Malicky & ..., 2002 | |
| Rhyacophila shakangpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila shekigawana M Kobayashi, 1973 | |
| Rhyacophila sherchokpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila sherpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila shikotsuensis M Iwata, 1927 | Bahama flatcoil |
| Rhyacophila shiliae | |
| Rhyacophila shingripa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila shiraishiensis M Kobayashi, 1971 | |
| Rhyacophila shresthai H Malicky, 2004 | |
| Rhyacophila sibirica R McLachlan, 1879 | Wallflower |
| Rhyacophila sichuanensis H Malicky & ..., 2002 | |
| Rhyacophila sicorensis L Navas, 1917 | Rocky Mountain dwarf-primrose |
| Rhyacophila sikungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila silinka TI Arefina, 1994 | |
| Rhyacophila similis (AV Martynov, 1935) | ⇒ Rhyacophila shikotsuensis M Iwata, 1927 |
| Rhyacophila sinensis AV Martynov, 1931 | Large clammyweed |
| Rhyacophila singularis L Botosaneanu, 1970 | |
| Rhyacophila sinuata DE Kimmins, 1953 | Bitter root |
| Rhyacophila siposi O Kiss, 2013 | |
| Rhyacophila smithi BJ Armitage ..., 2003 | |
| Rhyacophila soldani W Mey, 1989 | |
| Rhyacophila spinalis AV Martynov, 1930 | |
| Rhyacophila spinosellata W Mey, 1995 | |
| Rhyacophila spinulata AV Martynov, 1913 | |
| Rhyacophila stankovici M Radovanovic, 1932 | |
| Rhyacophila steinmanni O Kiss, 2013 | |
| Rhyacophila stenostyla AV Martynov, 1930 | |
| Rhyacophila stheneboia H Malicky & ..., 2006 | |
| Rhyacophila stigmatica (F Kolenati, 1859) | ⇒ Rhyacophila coloradensis Banks, 1904 |
| Rhyacophila styligera DE Kimmins, 1953 | Bitter root |
| Rhyacophila suah H Malicky & ..., 2009 | |
| Rhyacophila subovata AV Martynov, 1913 | |
| Rhyacophila sumatrana (Ulmer, 1930) | ⇒ Rhyacophila curvata KJ Morton, 1900 |
| Rhyacophila sumdopa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila sutchanica F Schmid & I..., 1986 | |
| Rhyacophila suthepensis (H Malicky, 1987) | ⇒ Rhyacophila curvata KJ Morton, 1900 |
| Rhyacophila szaboi O Kiss, 2013 | |
| Rhyacophila szeptyckii H Malicky, 1993 | |
| Rhyacophila tachikawana M Kobayashi, 1973 | |
| Rhyacophila tamdaoensis H Malicky, 1995 | |
| Rhyacophila tamdaona J Olah, 1987 | |
| Rhyacophila tamderensis Sipahiler, 2010 | |
| Rhyacophila tantichodoki H Malicky & ..., 1993 | |
| Rhyacophila tarda J Giudicelli, 1968 | |
| Rhyacophila tarkiya F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tashepa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tashidingpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tawauensis W Mey, 2011 | |
| Rhyacophila tecta KJ Morton, 1900 | |
| Rhyacophila tenebrosa W Mey, 1998 | |
| Rhyacophila tengyelingpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila ternifolia C Sun & L Yang, 1995 | |
| Rhyacophila terpsichore H Malicky, 1976 | |
| Rhyacophila tetracantha C Sun & L Yang, 1995 | |
| Rhyacophila tetraphylla C Sun & L Yang, 1995 | |
| Rhyacophila thyridata L Navas, 1935 | Gooseneck yellow loosestrife |
| Rhyacophila tianmushanensis H Malicky & ..., 2002 | |
| Rhyacophila tibori O Kiss, 2003 | |
| Rhyacophila tolungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tongmuensis | |
| Rhyacophila tonneri W Mey, 1989 | |
| Rhyacophila torulensis F Sipahiler, 2013 | |
| Rhyacophila tosagan H Malicky & ..., 1993 | |
| Rhyacophila towadensis (M Iwata, 1927) | ⇒ Rhyacophila articulata KJ Morton, 1900 |
| Rhyacophila transquilla M Tsuda, 1940 | |
| Rhyacophila trashipa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila trescaviscensis L Botosaneanu, 1960 | |
| Rhyacophila triangularis F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tridentata L Tian & Y Li, 1986 | |
| Rhyacophila triloba C Hwang, 1958 | |
| Rhyacophila trinacriformis L Tian & Y Li, 1986 | |
| Rhyacophila trireginorum J Olah & H M..., 2011 | |
| Rhyacophila trulungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila truncata DE Kimmins, 1953 | Bitter root |
| Rhyacophila tsering F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tshiringpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tshogpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tsiudmarpo F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tsona F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tsongkhapa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tsudai HH Ross, 1956 | Green wild indigo |
| Rhyacophila tsurakiana H Malicky, 1984 | |
| Rhyacophila tsusimaensis M Kobayashi, 1985 | |
| Rhyacophila tukuche SI Melnitsky, 2005 | |
| Rhyacophila tungkorpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila tupikana W Mey, 1994 | |
| Rhyacophila uchidai M Kobayashi, 1989 | |
| Rhyacophila ugyenpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila ulmeri L Navas, 1907 | Cliff dwarf-primrose |
| Rhyacophila uncata DE Kimmins, 1953 | Bitter root |
| Rhyacophila ungulata DE Kimmins, 1953 | Bitter root |
| Rhyacophila unisegmentalis H Malicky & ..., 2002 | |
| Rhyacophila vajoni O Kiss, 2011 | |
| Rhyacophila vallei GP Moretti, 1997 | |
| Rhyacophila vargai O Kiss, 2003 | |
| Rhyacophila vascula H Malicky & ..., 2002 | |
| Rhyacophila verecunda M Tsuda, 1940 | |
| Rhyacophila vernestril W Mey, 1996 | |
| Rhyacophila verugia H Malicky & ..., 1993 | |
| Rhyacophila vicina L Botosaneanu, 1970 | |
| Rhyacophila viduata (Navas, 1918) | ⇒ Rhyacophila laevis FJ Pictet, 1834 |
| Rhyacophila voccia H Malicky & ..., 1993 | |
| Rhyacophila vranitzensis L Botosanean..., 1967 | |
| Rhyacophila wangpo F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila wanichacheewai H Malicky, 1987 | |
| Rhyacophila wolongensis H Malicky, 1995 | |
| Rhyacophila wuyanensis C Sun & L Yang, 1998 | |
| Rhyacophila wuyiensis C Sun & L Yang, 1995 | |
| Rhyacophila xayide H Malicky & ..., 1989 | |
| Rhyacophila yamanakensis M Iwata, 1927 | Bahama flatcoil |
| Rhyacophila yamazakii M Tsuda, 1941 | |
| Rhyacophila yarlungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila yigrongpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila yipung F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila yishepa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila yonggyapa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila yora H Malicky, 1989 | |
| Rhyacophila yoshinensis M Tsuda & T ..., 1967 | |
| Rhyacophila yosiiana M Tsuda, 1940 | |
| Rhyacophila yukii M Tsuda, 1942 | |
| Rhyacophila yullha F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila zhiltsovae VD Ivanov, 1991 | |
| Rhyacophila zhungpa F Schmid, 1970 | Threebract loosestrife |
| Rhyacophila zwickorum H Malicky, 1972 | |
