Parachironomus gr. vitiosus Moller Pillot (1984a) – synonym of Parachironomus biannulatus
Parachironomus primitivus Johannsen, 1932 – synonym of Microchironomus tener
Parachironomus vitiosus Shilova (1965) – synonym of Parachironomus biannulatus
Paracladopelma obscura Brundin, 1949 nom. nov. for claripennis: Edwards, 1929 nec Malloch, 1915 – synonym of Paracladopelma nigritula
Paracricotopus thienemanni Berczik, 1959 (a questionable synonymy) – synonym of Paracricotopus niger
Paralauterborniella nigrohalteralis
Paraphaenocladius ampullaceus var. austriacus Kieffer, 1924 in Albrecht, 1924a – synonym of Paraphaenocladius impensus
Paraphaenocladius exagitans-monticola
Paraphaenocladius pseudirritus
Paratanytarsus bilobatus Kieffer, 1922 – synonym of Paratanytarsus intricatus
Paratendipes connectens 3 Lipina
Paratendipes transcaucasicus Chernovskij, 1949 – synonym of Paratendipes nudisquama
Paratrichocladius luteoligaster Santos-Abreu, 1918 (a questionable synonymy) – synonym of Paratrichocladius rufiventris
Paratrissocladius fluviatilis Goetghebuer, 1937 in Zavrel, 1937a – synonym of Paratrissocladius excerptus
Pelopia bimaculata var. microtoma Kieffer, 1911 – synonym of Macropelopia nebulosa
Pelopia enhydra Kieffer, 1911 – synonym of Macropelopia nebulosa
Pelopia enhydra var. rhypophila Kieffer, 1911 – synonym of Macropelopia nebulosa
Pelopia hesseana Kieffer, 1915 – synonym of Monopelopia tenuicalcar
Pelopia miriforceps Kieffer, 1916 in Thienemann and Kieffer, 1916a – synonym of Ablabesmyia monilis
Pelopia semiglabra Kieffer, 1915 – synonym of Ablabesmyia monilis
Pentapedilum ceciliae Chernovskij, 1949 n.n. – synonym of Polypedilum sordens
Pentapedilum ceciliae Romaniszyn, 1958 validation of P. ceciliae Chernovskij, 1949 – synonym of Polypedilum sordens
Pentapedilum muscicola Kieffer, 1924 – synonym of Polypedilum uncinatum
Pentapedilum riparium Kieffer, 1921 – synonym of Polypedilum sordens
Pesctrocladius tadshikistanicus Akhrorov, 1977 – synonym of Psectrocladius barbimanus
Phaenocladius bavaricus Kieffer, 1924 (a questionable synonymy) – synonym of Paratrichocladius rufiventris
Phytochironomus imicola Kieffer, 1926 – synonym of Glyptotendipes barbipes
Phytochironomus varipes Goetghebuer, 1927 (a questionable synonymy) – synonym of Glyptotendipes signatus
Polypedilum breviantennatum Chernovskij, 1949 – synonym of Polypedilum scalaenum
Polypedilum ciliatimanus Kieffer, 1915 – synonym of Polypedilum c tritum
Polypedilum ciliatimanus Kieffer, 1915 – synonym of Polypedilum nubeculosum
Polypedilum emarginatum Kieffer, 1913 – synonym of Polypedilum c tritum
Polypedilum emarginatum Kieffer, 1913 – synonym of Polypedilum nubeculosum
Polypedilum geissbühleri Goetghebuer, 1939 – synonym of Polypedilum c tritum
Polypedilum geissbühleri Goetghebuer, 1939 – synonym of Polypedilum nubeculosum
Polypedilum gr. convictum Chernovskii (1949) – synonym of Polypedilum cultellatum
Polypedilum heptastictum Kieffer, 1922 (nomen dubium) – synonym of Polypedilum laetum
Polypedilum hirtimanus Kieffer, 1915 – synonym of Polypedilum c tritum
Polypedilum hirtimanus Kieffer, 1915 – synonym of Polypedilum nubeculosum
Polypedilum laetum agg. Moller Pillot (1984a) – synonym of Polypedilum convictum
Polypedilum minuta Romaniszyn, 1958 validation of minuta Chernovskij, 1938 – synonym of Pagastiella orophila
Polypedilum nigritum Townes, 1945 – synonym of Polypedilum albicorne
Polypedilum nympha Kieffer, 1916 in Thienemann and Kieffer, 1916a – synonym of Polypedilum convictum
Polypedilum nympha var. ploenensis Kieffer, 1922 – synonym of Polypedilum convictum
Polypedilum obliteratum Kieffer, 1920 (nomen dubium) – synonym of Polypedilum c tritum
Polypedilum obliteratum Kieffer, 1920 (nomen dubium) – synonym of Polypedilum nubeculosum
Polypedilum obliteratum var. majus Kieffer, 1922 (nomen dubium) – synonym of Polypedilum c tritum
Polypedilum obliteratum var. majus Kieffer, 1922 (nomen dubium) – synonym of Polypedilum nubeculosum
Polypedilum obliteratum var. opacum Kieffer, 1920 (nomen dubium) – synonym of Polypedilum c tritum
Polypedilum obliteratum var. opacum Kieffer, 1920 (nomen dubium) – synonym of Polypedilum nubeculosum
Polypedilum obliteratum var. scutellare Kieffer, 1922 (nomen dubium) – synonym of Polypedilum c tritum
Polypedilum obliteratum var. scutellare Kieffer, 1922 (nomen dubium) – synonym of Polypedilum nubeculosum
Polypedilum scalaenum var. conjunctum Kieffer, 1920 – synonym of Polypedilum scalaenum
Polypedilum stagnale Shilova, 1955 – synonym of Polypedilum c tritum
Polypedilum stagnale Shilova, 1955 – synonym of Polypedilum nubeculosum
Polypedilum subcultellatum Sublette, 1960 – synonym of Polypedilum cultellatum
Prodiamesa ichtyobrota Kieffer, 1909 – synonym of Prodiamesa olivacea
Prodiamesa nigripalpis Goetghebuer, 1922 – synonym of Odontomesa fulva
Protenthes moravicus Kieffer, 1926 in Zavrel, 1926a – synonym of Tanypus punctipennis
Protenthes punctipennis var. ferrugineus Kieffer, 1918 – synonym of Tanypus punctipennis
Psectrocladius dispar Akhrorov, 1977 – synonym of Psectrocladius barbimanus
Psectrocladius foliaceus Kieffer, 1921 – synonym of Camptocladius stercorarius
Psectrocladius goetghebueri Akhrorov, 1977 – synonym of Psectrocladius barbimanus
Psectrocladius ishimicus Chernovskij, 1949 (a questionable synonymy) – synonym of Psectrocladius barbimanus
Psectrocladius pamiricus Akhrorov, 1977 – synonym of Psectrocladius barbimanus
Psectrocladius symbiotica Akhrorov, 1977 – synonym of Psectrocladius barbimanus
Psectrocladius zernovi Akhrorov, 1977 – synonym of Psectrocladius barbimanus
Psectrotanypus brevicalcar Kieffer, 1909 – synonym of Psectrotanypus varius
Psectrotanypus brevicalcar var. diplosis Kieffer, 1918 , and Kieffer, 1919a: p. 156 – synonym of Psectrotanypus varius
Psectrotanypus brevicalcar var. stagnicola Kieffer, 1911 – synonym of Psectrotanypus varius
Psectrotanypus brevicalcar var. thummi Kieffer, 1911 – synonym of Psectrotanypus varius
Psectrotanypus longipennis Goetghebuer, 1921 – synonym of Trissopelopia longimana
Psectrotanypus migrator Kieffer, 1911 – synonym of Trissopelopia longimana
Psectrotanypus pallens Vimmer, 1927 – synonym of Psectrotanypus varius
Pseudorthocladius curtistylatus: Coe, 1950 , misidentification – synonym of Pseudorthocladius curtistylus