| Nominal Species (n = 139) | Present allocation (n = 88) | Ref. |
|---|---|---|
| Rhynchobdella aculeata siamensis Günther, 1861 | Macrognathus siamensis | 26282 |
| Ophidium aculeatum Basilewsky, 1855 | Sinobdella sinensis | 44416 |
| Ophidium aculeatum (non Bloch, 1786) | Macrognathus aral | 4833 |
| Ophidium aculeatum Bloch, 1786 | Macrognathus aculeatus | 2091 |
| Mastacembelus alboguttatus Boulenger, 1893 | Mastacembelus alboguttatus | 4833 |
| Mastacembelus albomaculatus Poll, 1953 | Mastacembelus albomaculatus | 56254 |
| Macrognathus albus Plamoottil & Abraham, 2014 | Macrognathus albus | 97143 |
| Mastacembelus ansorgii Boulenger, 1905 | Mastacembelus ansorgii | 56254 |
| Mastacembelus apectoralis Brown, Britz, Bills, Rüber & Day, 2011 | Mastacembelus apectoralis | 86808 |
| Rhynchobdella aral Bloch & Schneider, 1801 | Macrognathus aral | 4833 |
| Mastacembelus argus Günther, 1861 | Mastacembelus erythrotaenia | 2091 |
| Macrognathus armatus Lacepède, 1800 | Mastacembelus armatus | 4833 |
| Mastacembelus armatus favus Hora, 1924 | Mastacembelus favus | 7442 |
| Macrognathus aureus Britz, 2010 | Macrognathus aureus | 84451 |
| Mastacembelus aviceps Roberts & Stewart, 1976 | Mastacembelus aviceps | 56254 |
| Mastacembelus batesii Boulenger, 1911 | Mastacembelus niger | 81678 |
| Mastacembelus billitonensis de Beaufort, 1939 | Macrognathus maculatus | 2091 |
| Mastacembelus brachyrhinus Boulenger, 1899 | Mastacembelus brachyrhinus | 56254 |
| Mastacembelus brevicauda Boulenger, 1911 | Mastacembelus niger | 81678 |
| Caecomastacembelus brichardi Poll, 1958 | Mastacembelus brichardi | 56254 |
| Mastacembelus catchpolei Fowler, 1936 | Mastacembelus catchpolei | 56254 |
| Macrognathus caudatus McClelland, 1842 | Mastacembelus armatus | 41236 |
| Mastacembelus caudiocellatus Boulenger, 1893 | Macrognathus caudiocellatus | 4833 |
| Mastacembelus christyi Worthington & Ricardo, 1937 | Mastacembelus moorii | 6060 |
| Mastacembelus circumcinctus Hora, 1924 | Macrognathus circumcinctus | 43281 |
| Mastacembelus circumcinctus (non Hora, 1924) | Macrognathus taeniagaster | 12693 |
| Mastacembelus congicus Boulenger, 1896 | Mastacembelus congicus | 56254 |
| Mastacembelus crassus Roberts & Stewart, 1976 | Mastacembelus crassus | 56254 |
| Mastacembelus cryptacanthus (non Günther, 1867) | Mastacembelus loennbergii | 6060 |
| Mastacembelus cryptacanthus Günther, 1867 | Mastacembelus cryptacanthus | 56254 |
| Mastacembelus cunningtoni Boulenger, 1906 | Mastacembelus cunningtoni | 56254 |
| Mastacembelus dayi Boulenger, 1912 | Mastacembelus dayi | 4833 |
| Mastacembelus decorsei Pellegrin, 1919 | Mastacembelus decorsei | 56254 |
| Rhynchobdella dhanashorii Hora, 1921 | Macrognathus aral | 41236 |
| Mastacembelus dienbienensis Nguyen & Nguyen, 2005 | Mastacembelus dienbienensis | 84797 |
| Macrognathus dorsiocellatus Britz, 2010 | Macrognathus dorsiocellatus | 83418 |
| Mastacembelus ellipsifer Boulenger, 1899 | Mastacembelus ellipsifer | 56254 |
| Mastacembelus erythrotaenia Bleeker, 1850 | Mastacembelus erythrotaenia | 12693 |
| Macrognathus fasciatus Plamoottil & Abraham, 2014 | Macrognathus fasciatus | 97143 |
| Mastacembelus flavidus Matthes, 1962 | Mastacembelus flavidus | 56254 |
| Mastacembelus flavomarginatus (non Boulenger, 1898) | Mastacembelus kakrimensis | 55095 |
| Mastacembelus flavomarginatus Boulenger, 1898 | Mastacembelus niger | 26075 |
| Mastacembelus frenatus Boulenger, 1901 | Mastacembelus frenatus | 56254 |
| Mastacembelus goro Boulenger, 1902 | Mastacembelus niger | 81678 |
| Mastacembelus greshoffi Boulenger, 1901 | Mastacembelus greshoffi | 56254 |
| Mastacembelus greshoffi (non Boulenger, 1901) | Mastacembelus taiaensis | 7394 |
| Mastacembelus guentheri Day, 1865 | Macrognathus guentheri | 4833 |
| Mastacembelus guentheri (non Day, 1865) | Macrognathus malabaricus | 41236 |
| Rhynchobdella haleppensis Bloch & Schneider, 1801 | Mastacembelus mastacembelus | 33021 |
| Macrognathus hamiltonii McClelland, 1844 | Mastacembelus armatus | 41236 |
| Macrognathus jammuensis Malhotra & Singh Dutta, 1975 | Macrognathus aral | 4833 |
| Mastacembelus kadeiensis Roberts, 2020 | Mastacembelus kadeiensis | 123814 |
| Mastacembelus kakrimensis Vreven & Teugels, 2005 | Mastacembelus kakrimensis | 55095 |
| Mastacembelus keithi Herre, 1940 | Macrognathus keithi | 26282 |
| Mastacembelus latens Roberts & Stewart, 1976 | Mastacembelus latens | 56254 |
| Mastacembelus laticauda Ahl, 1937 | Mastacembelus liberiensis | 55095 |
| Mastacembelus liberiensis Boulenger, 1898 | Mastacembelus liberiensis | 56254 |
| Macrognathus lineatomaculatus Britz, 2010 | Macrognathus lineatomaculatus | 83418 |
| Mastacembelus loennbergii (non Boulenger, 1898) | Mastacembelus decorsei | 7394 |
| Mastacembelus loennbergii (non Boulenger, 1898) | Mastacembelus cryptacanthus | 7394 |
| Mastacembelus loennbergii Boulenger, 1898 | Mastacembelus loennbergii | 56254 |
| Mastacembelus loennbergii (non Boulenger, 1898) | Mastacembelus taiaensis | 7394 |
| Mastacembelus longicauda Boulenger, 1907 | Mastacembelus cryptacanthus | 7394 |
| Mastacembelus maculatus Cuvier, 1832 | Macrognathus maculatus | 7050 |
| Mastacembelus maculatus chrysogaster Bleeker, 1852 | Macrognathus maculatus | 2091 |
| Mastacembelus maculatus dictyogaster Bleeker, 1852 | Macrognathus maculatus | 2091 |
| Mastacembelus malabaricus Jerdon, 1849 | Macrognathus malabaricus | 41236 |
| Mastacembelus manipurensis Hora, 1921 | Mastacembelus armatus | 4833 |
| Mastacembelus marchei Sauvage, 1879 | Mastacembelus marchei | 56254 |
| Mastacembelus marchei (non Sauvage, 1879) | Mastacembelus liberiensis | 55095 |
| Mastacembelus marmoratus Perugia, 1892 | Mastacembelus niger | 81678 |
| Mastacembelus marmoratus Cuvier, 1832 | Mastacembelus armatus | 41236 |
| Ophidium mastacembelus Banks & Solander, 1794 | Mastacembelus mastacembelus | 33021 |
| Macrognathus meklongensis Roberts, 1986 | Macrognathus meklongensis | 39392 |
| Mastacembelus mellandi Boulenger, 1914 | Mastacembelus frenatus | 6060 |
| Mastacembelus micropectus Matthes, 1962 | Mastacembelus micropectus | 56254 |
| Mastacembelus moeruensis Boulenger, 1914 | Mastacembelus frenatus | 95585 |
| Mastacembelus moorii Boulenger, 1898 | Mastacembelus moorii | 56254 |
| Mastacembelus moorii nigrofasciatus David & Poll, 1937 | Mastacembelus moorii | 6060 |
| Macrognathus morehensis Arunkumar & Tombi Singh, 2000 | Macrognathus morehensis | 97143 |
| Mastacembelus mutombotombo Pellegrin, 1936 | Mastacembelus frenatus | 6060 |
| Mastacembelus niger Sauvage, 1879 | Mastacembelus niger | 56254 |
| Mastacembelus nigromarginatus Boulenger, 1898 | Mastacembelus nigromarginatus | 56254 |
| Mastacembelus notophthalmus Roberts, 1989 | Mastacembelus notophthalmus | 2091 |
| Mastacembelus oatesii Boulenger, 1893 | Mastacembelus oatesii | 4833 |
| Macrognathus obscurus Britz, 2010 | Macrognathus obscurus | 83418 |
| Rhynchobdella ocellata Cuvier, 1832 | Macrognathus aculeatus | 92135 |
| Mastacembelus ophidium Günther, 1894 | Mastacembelus ophidium | 56254 |
| Macrognathus pancalus Hamilton, 1822 | Macrognathus pancalus | 4833 |
| Mastacembelus pantherinus Britz, 2007 | Mastacembelus pantherinus | 78150 |
| Mastacembelus paucispinis Boulenger, 1899 | Mastacembelus paucispinis | 56254 |
| Mastacembelus paucispinis Fowler, 1939 | Macrognathus tapirus | 56749 |
| Macrognathus pavo Britz, 2010 | Macrognathus pavo | 83418 |
| Mastacembelus pentophthalmos Gronow, 1854 | Macrognathus pentophthalmos | 86697 |
| Mastacembelus perakensis Myers, 1937 | Macrognathus maculatus | 2091 |
| Mastacembelus plagiostomus Matthes, 1962 | Mastacembelus plagiostomus | 56254 |
| Mastacembelus platysoma Poll & Matthes, 1962 | Mastacembelus platysoma | 56254 |
| Mastacembelus polli Vreven, 2005 | Mastacembelus polli | 56055 |
| Mastacembelus ponticerianus Cuvier, 1832 | Mastacembelus armatus | 41236 |
| Aethiomastacembelus praensis Travers, 1992 | Mastacembelus praensis | 56254 |
| Mastacembelus punctatus Cuvier, 1832 | Macrognathus pancalus | 41236 |
| Mastacembelus reticulatus Boulenger, 1911 | Mastacembelus liberiensis | 55095 |
| Mastacembelus reygeli Vreven & Snoeks, 2009 | Mastacembelus reygeli | 82667 |
| Aethiomastacembelus robertsi Vreven & Teugels, 1996 | Mastacembelus robertsi | 56254 |
| Mastacembelus sanagali Thys van den Audenaerde, 1972 | Mastacembelus sanagali | 56254 |
| Mastacembelus sclateri Boulenger, 1903 | Mastacembelus marchei | 81678 |
| Mastacembelus seiteri Thys van den Audenaerde, 1972 | Mastacembelus seiteri | 56254 |
| Macrognathus semiocellatus Roberts, 1986 | Macrognathus semiocellatus | 27732 |
| Afromastacembelus sexdecimspinus Roberts & Travers, 1986 | Mastacembelus sexdecimspinus | 26282 |
| Aethiomastacembelus shiloangoensis Vreven, 2004 | Mastacembelus shiloangoensis | 56254 |
| Mastacembelus shiranus Günther, 1896 | Mastacembelus shiranus | 56254 |
| Mastacembelus signatus Boulenger, 1905 | Mastacembelus congicus | 95585 |
| Ophidium simack Walbaum, 1792 | Mastacembelus mastacembelus | 33021 |
| Mastacembelus simbi Vreven & Stiassny, 2009 | Mastacembelus simbi | 84205 |
| Rhynchobdella sinensis Bleeker, 1870 | Sinobdella sinensis | 26282 |
| Mastacembelus stappersii Boulenger, 1914 | Mastacembelus frenatus | 95585 |
| Mastacembelus strigiventus Zhou & Yang, 2011 | Mastacembelus strigiventus | 86860 |
| Mastacembelus taeniagaster Fowler, 1935 | Macrognathus taeniagaster | 26282 |
| Mastacembelus taeniatus Boulenger, 1901 | Mastacembelus frenatus | 6060 |
| Caecomastacembelus taiaensis Travers, 1992 | Mastacembelus taiaensis | 56254 |
| Mastacembelus tanganicae Günther, 1894 | Mastacembelus tanganicae | 56254 |
| Macrognathus tapirus Kottelat & Widjanarti, 2005 | Macrognathus tapirus | 56749 |
| Mastacembelus thacbaensis Nguyen & Nguyen, 2005 | Mastacembelus thacbaensis | 84797 |
| Mastacembelus thompsoni Boulenger, 1918 | Mastacembelus frenatus | 6060 |
| Mastacembelus tinwini Britz, 2007 | Mastacembelus tinwini | 78150 |
| Aethiomastacembelus traversi Vreven & Teugels, 1997 | Mastacembelus traversi | 56254 |
| Mastacembelus triolobus Zhou & Yang, 2011 | Mastacembelus triolobus | 86860 |
| Mastacembelus trispinosus Steindachner, 1911 | Mastacembelus trispinosus | 56254 |
| Mastacembelus ubangensis Boulenger, 1911 | Mastacembelus niger | 81678 |
| Mastacembelus ubangipaucispinis Roberts, 2020 | Mastacembelus ubangipaucispinis | 123814 |
| Macrognathus undulatus (non McClelland, 1844) | Mastacembelus armatus | 78150 |
| Macrognathus undulatus McClelland, 1844 | Mastacembelus undulatus | 78150 |
| Mastacembelus unicolor Cuvier, 1832 | Mastacembelus unicolor | 2091 |
| Mastacembelus unicolor (non Cuvier, 1832) | Mastacembelus dayi | 4833 |
| Mastacembelus vaillanti Fowler, 1905 | Macrognathus maculatus | 2091 |
| Mastacembelus vanderwaali Skelton, 1976 | Mastacembelus vanderwaali | 56254 |
| Mastacembelus victoriae Boulenger, 1903 | Mastacembelus frenatus | 6060 |
| Mastacembelus zebratus Matthes, 1962 | Mastacembelus zebratus | 56254 |
| Mastacembelus zebrinus Blyth, 1858 | Macrognathus zebrinus | 4833 |