Orthocladiinae g? acutilabis Konstantinov, 1948 – synonym of Symposiocladius lignicola
Orthocladiinae gen ?1 xylophila Botnariuc and Cure, 1956 – synonym of Symposiocladius lignicola
Orthocladiinae gen. ?1 dospatica Dimitrov, 1963 – synonym of Odontomesa fulva
Orthocladius (Orthocladius) breviseta Saether, 1969 nec Kieffer, 1923 – synonym of Orthocladius rubicundus
Orthocladius (Orthocladius) rachelae Rossaro and Prato, 1991 – synonym of Orthocladius wetterensis
Orthocladius crassicornis Goetghebuer, 1937 – synonym of Orthocladius consobrinus
Orthocladius curtiseta Saether, 1973 nom. nov. for Orthocladius (Orthocladius) breviseta Saether, 1969 – synonym of Orthocladius rubicundus
Orthocladius dispar Goetghebuer, 1942 – synonym of Orthocladius obumbratus
Orthocladius dorieri Goetghebuer, 1931 in Goetghebuer and Dorier, 1931a – synonym of Rheocricotopus effusus
Orthocladius excavatus Brundin, 1947 – synonym of Orthocladius obumbratus
Orthocladius fusiformis Goetghebuer and Dorier, 1939 – synonym of Orthocladius rivicola
Orthocladius grandis Kieffer, 1921 – synonym of Hydrobaenus pilipes
Orthocladius grandis var. barbatipes Kieffer, 1924 – synonym of Hydrobaenus pilipes
Orthocladius grandis var. ciliatipes Kieffer, 1924 – synonym of Hydrobaenus pilipes
Orthocladius grandis var. grossus Kieffer, 1924 – synonym of Hydrobaenus pilipes
Orthocladius grandis var. permixtus Kieffer, 1924 – synonym of Hydrobaenus pilipes
Orthocladius grandis var. tristylus Kieffer, 1924 – synonym of Hydrobaenus pilipes
Orthocladius naumanni Brundin, 1949 – synonym of Zalutschia zalutschicola
Orthocladius rhyacobius Kieffer, 1911 – synonym of Orthocladius obumbratus
Orthocladius rhyacophilus Kieffer, 1911 – synonym of Orthocladius obumbratus
Orthocladius saxicola Kieffer, 1911 – synonym of Orthocladius rubicundus
Orthocladius sordidellus: Kieffer and Thienemann, 1906 nec Chironomus sordidellus Zetterstedt, 1838 – synonym of Orthocladius rivulorum
Orthocladius tenuipes Becker, 1908 – synonym of Paratrichocladius rufiventris