THALESTRIDAE Sars, 1905 (syn. Rhynchothalestridae Lang, 1948; Rhynchothalestrinae
SUBFAMILY THALESTRINAE Sars, 1905
AMENOPHIA Boeck, 1865
Amenophia orientalis Ho & Hong, 1988 
Amenophia ovalis Lang, 1948 (species inquirenda)
Amenophia peltata Chislenko, 1967 (syn. Thalestris peltata (Boeck, 1865)
Amenophia pulchella Sars, 1906
Amenophia tenuicornis Brady, 1910 (= Rhynchothalestris tenuicornis (Brady, 1910)
PARAMENOPHIA Lang, 1954
Paramenophia chilensis Lang, 1954
Paramenophia chilensis tristanensis Wiborg, 1964
Paramenophia platysoma (Thompson & Scott, 1903)
PARATHALESTRIS Brady & Robertson, 1873 (syn. Halithalestris Sars G.O., 1905)
The genus Parathalestris Brady & Robertson, 1873 comprises 34 valid species. As the most speciose
genus of the Thalestridae, Parathalestris is characterized by the morphological combination
of the two-segmented exopod of the antenna, the second segment of the P2 endopod with
two inner setae, and both the enp-2 of P3 and P4 with only one inner seta .
Species of the genus Parathalestris are benthic forms that mainly inhabit the surface of
sediment. Most of the species are associated with macrophytes, but only P. infesta Ho
& Hong, 1988 has been formally reported from mine algal fronds . At present, eight
species from the West Pacific have been reported, mainly concentrated in eastern Russia,
Japan, South Korea and Thailand (from: Wu et al, 2023 )
Parathalestris affinis Lang, 1948
Parathalestris areolata Itô 1972
Parathalestris aurantiaca Pallares, 1975
Parathalestris bulbiseta Lang, 1965
Parathalestris californica Lang, 1965
Parathalestris cambriensis Wells, 1964
Parathalestris clausi Apostolov & Marinov, 1988
Parathalestris clause subsp. islandica Apostolov, 2021 [Iceland]
Parathalestris coatsi Scott, 1912
Parathalestris croni Boxshall, 1979
Parathalestris denti (Brady, 1905)
Parathalestris dovi Marcus, 1966
Parathalestris ganio Pallares, 1975
Parathalestris harpactoides (Claus, 1863)
Parathalestris hibernica Lang, 1948
Parathalestris incerta Lang, 1948
Parathalestris infesta Chang & Song, 1997
Parathalestris intermedia Vos, 1945
Parathalestris irelandica Roe, 1958
Parathalestris jejuensis Song & Hwang, 2010 [Korea]
Parathalestris jacksoni Lang, 1948
Parathalestris mourei Masunari , 1988
Parathalestris northumbrica Norman & Brady, 1909
Parathalestris pacificus Chang & Song, 1997
Parathalestris paraharpactoides Lang, 1948
Parathalestris parviseta Chang & Song, 1997
Parathalestris patagonica Pallares, 1975
Parathalestris perplexa (Scott T., 1912)
Parathalestris platycheles (Brady, 1902)
Parathalestris plumiseta Moore, 1976 (= Parathalestris intermedia Gurney, 1930
Parathalestris similis Lang, 1948
Parathalestris spectabilis Brian, 1923 (= Eudactylopus spectabilis (Brian, 1923)
Parathalestris verrucosa Chang & Song, 1997
Parathalestris vinosa Pallares, 1975
Parathalestris yeemini Chullasorn et al., 2016 [Thailand]
Parathalestris xinzhengi Wu et al., 2023
Partial key to species of Parathalestris
PHYLLOTHALESTRIS Sars, 1905
Phyllothalestris frigida Sars G.O., 1909
Phyllothalestris harringtoni Geddes, 1969
Phyllothalestris lata Nicholls, 1942
Phyllothalestris mysis Sewell , 1940
Phyllothalestris orientalis Sewell, 1940
Phyllothalestris paramysis Monard, 1928
Phyllothalestris royi (Monard, 1928)
Phyllothalestris sarsi (Nicholls, 1942)
THALESTRIS Claus, 1863 (syn. Fucitrogus Brady, 1894)
Thalestris australis Brady, 1899
Thalestris brevicornis Czerniavski, 1868
Thalestris brunnea Lang, 1948
Thalestris ciliata Brady, 1899
Thalestris clausi Norman, 1869 (syn. Parathalestris clausi (Norman, 1869)
Thalestris croni (Krøyer in Gaimard, 1842) (syn. Halithalestris croni (Krøyer in Gaimard, 1842); Parathalestris croni (Krøyer in Gaimard, 1842)
Thalestris curticauda Boeck, 1865
Thalestris curticornis Boeck, 1865
Thalestris denti Lang, 1948 (syn. Parathalestris denti (Brady, 1905))
Thalestris filifera Krichagin, 1877
Thalestris forficula Claus, 1863 (syn. Microthalestris forficula (Claus, 1863)
Thalestris forficuloides Scott T. & Scott A., 1894
Thalestris frigida Lang, 1948
Thalestris gibba Lang, 1948
Thalestris gigas Chislenko, 1980
Thalestris harpactoides Claus, 1863(syn. Parathalestris harpactoides (Claus, 1863)
Thalestris helgolandica Claus, 1863 (syn. Rhynchothalestris helgolandica (Claus, 1863)
Thalestris hibernica Brady & Robertson, 1873 (syn. Parathalestris hibernica (Brady & Robertson, 1873)
Thalestris hokkaidoensisTakemori & Iwasaki, 2009 [Japan]
Thalestris karmensis Boeck, 1865
Thalestris jacksoni Scott T., 1899 (syn. Parathalestris jacksoni (Scott T., 1899)
Thalestris longipes Boeck, 1865
Thalestris longimana Claus, 1863
Thalestris microphylla Claus, 1863
Thalestris mysis Claus, 1863 (syn. Phyllothalestris mysis (Claus, 1863)
Thalestris normani Lang, 1948
Thalestris northumbrica Lang 1948 (syn. Parathalestris northumbrica Norman & Brady, 1909)
Thalestris pectinimana Car, 1884
Thalestris peltata (Boeck, 1865)
Thalestris polaris Scott T., 1899
Thalestris pontica Czerniavski, 1868
Thalestris purpurea Lang, 1948
Thalestris rhodymeniae Harding, 1954
Thalestris robusta Claus, 1863 (syn. Thalestris valida Wilson C.B., 1924
Thalestris rufocincta Brady, 1880 (syn. Rhynchothalestris similis Scott A., 1909
Thalestris rufoviolascens Lang, 1948
Thalestris serrulata Brady, 1880
Thalestris sordida Lang, 1948
Thalestris valida Wilson C.B., 1924
Halithalestris Sars G.O., 1905 accepted as Parathalestris Brady & Robertson, 1873 (synonym)
Plesiothalestris Brian, 1928 accepted as Eudactylopus Scott A., 1909 (synonym);
Vallentinia Norman & Scott T., 1906 accepted as Dactylopodella Sars G.O., 1905; Fucitrogus Brady, 1894 accepted as Thalestris Claus, 1862 (synonym)
Key to species of Thalestris Claus, 1862
MICROTHALESTRIS Sars, 1905
Microthalestris spinosa (Fisher, 1860)
Microthalestris forficula (Claus, 1863)
Microthalestris forficuloides (Scott & Scott, 1894)
Microthalestris littoralis Sars, 1911
Microthalestris sarsi Huys & Mu, 2021 [China]
Microthalestris polaris Huys & Mu, 2021 [China]
Microthalestris campbelliensis Huys & Mu, 2021 [China]
Microthalestris santacruzensis Huys & Mu, 2021 [China]
Microthalestris variabilis Huys & Mu, 2021 [China]
SUBFAMILY EUDACTYLOPUSIINAE Willen, 2000
EUDACTYILOPUS A. Scott, 1909 (syn. Plesiothalestris Brian, 1928)
Eudactylopus andrewi (Vervoort, 1964>
Eudactylopus anomala Sewell, 1940 (?)
Eudactylopus atlanticus (Noodt, 1955)
Eudactylopus australis Nicholls, 1942
Eudactylopus clausi spectabilis mihi (Brian, 1923)
Eudactylopus fasciatus Sewell, 1940
Eudactylopus krusadensis (Krihnaswamy, 1950 [India]
Eudactylopus latipes Sewell ,1940
Eudactylopus lucayosi Geddes, 1969
Eudactylopus opima Sewell , 1940
Eudactylopus robustus Lang, 1948
Eudactylopus spectabilis Chang & Song, 1995
Eudactylopus fasciatus Sewell , 1940
Eudactylopus opima major Sewell , 1940
Eudactylopus robustus Geddes, 1969
Eudactylopus striatus Sewell , 1940
Eudactylopus yokjidoensis Cho et al,. 2018 [Korea]
NEODACTYLOPUS Nicholls, 1945
Neodactylopus cyclopoides Por, 1967
Neodactylopus anomala (Sewell, 1940)
Neodactylopus trichodes Wells & Rao, 1987
MARIONOBIOTUS Chappuis, 1940
Marionobiotus jeanneli Chappuis, 1940
MAWSONELLA Brady, 1918
Mawsonella typica Brady, 1918
METAPHROSO Brady, 1910
Metaphroso gracilis Brady, 1910
PELTTHESTRIS Monard, 1924
Peltthestris tripartita Monard, 1924
PHROSO Brady, 1899
Phroso gracilis Brady, 1899
RHYNCHOTHALESTRIS Sars G.O., 1905
Rhynchothalestris agigensis Chappuis & Serban, 1953
Rhynchothalestris campbelliensis Lang, 1934
Rhynchothalestris cornuta Geddes, 1969 (=Lucayostratiotes cornuta (Geddes, 1969)
Rhynchothalestris helgolandica (Claus, 1863)
Rhynchothalestris rufocincta (Brady, 1880) (= Ambunguipes rufocincta (Norman in Brady, 1880)
Rhynchothalestris similis Scott A., 1909 (= Ambunguipes similis (Scott A., 1909)
Rhynchothalestris tenuicornis (Brady, 1910)
Rhynchothalestris tenuis Chislenko, 1971
Rhynchothalestris vanhoffeni Brady, 1910
Ambunguipes rufocincta (Brady, 1880) [Europe, north Africa, New Guinea; brackish waters]
Ambunguipes similis (A. Scott, 1909) [Australia?; marine]
Ambunguipes vanhoeffeni (Brady, 1910) [Kapland; ?] *
* questionable species (Bodin, 1997)
LUCAYOSTRATIOTES Huys, 1990
Lucayostratiotes cornuta (Geddes, 1969) [Bahamas; marine]
HAMONDIA Huys, 1990
Hamondia superba Huys, 1990 [Australia; sponges associated]
PELTHESTRIS Monard, 1924
Peltthestris tripartita Lang, 1948
NO SUBFAMILY DEFINEDDACTYLOPUSIOIDES Shimono et al. 2004
Dactyliopusioides fodiens Shimono et al. 2004 [Japan; marine]
Dactylopusioides malleus Shimono et al., 2007 [Japan; marine]
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