Geometridae Leach, 1815
Thera abolla Inoue, 1943
Thera albata Lempke, 1950
Thera albida Stichel, 1911
Thera albonigrata Höfer, 1920
Thera approximata Lempke, 1950
Thera atrinotata Joannis, 1929
Thera balcanicola De Lattin, 1951
Thera bellisi Viidalepp, 1977
Thera benisegnata Barnes & McDunnough, 1917
Thera britannica Turner, 1925
Thera brunneoalbata Heydemann, 1933
Thera brunneofasciata Lempke, 1950
Thera caeca Osthelder, 1924
Thera castanea Lempke, 1950
Thera cembrae Kitt, 1912
Thera cognata Thunberg, 1792
Thera comis Butler, 1879
Thera comitabilis Prout, 1923
Thera completa Bergmann, 1955
Thera coniferata Curtis, 1834
Thera consobrinata Curtis, 1824
Thera continua Strand, 1903
Thera contracta Hulst, 1896
Thera contractata Packard, 1873
Thera costaclausa Lempke, 1950
Thera costajuncta Lempke, 1950
Thera costimaculata Höfer, 1921
Thera costovata Vorbrodt, 1917
Thera cupestrata Freyer, 1830
Thera cupressata Hübner & Geyer, 1828/31
Thera cyphoschema Prout, 1926
Thera dentifascia Prout, 1914
Thera dentifasciata Hampson, 1895
Thera dilectaria Bang-Haas, 1910
Thera diniensis Heinrich, 1923
Thera dissoluta Hxöfer, 1920
Thera distracta Sterneck, 1928
Thera divisa Höfer, 1920
Thera djakonovi Kurentzov, 1950
Thera ecce Bryk, 1942
Thera etes Prout, 1926
Thera exangulata Warren, 1909
Thera expiata Püngeler, 1904
Thera fedtschenkoi Erschoff, 1874
Thera firmata Hübner, 1819/22
Thera geneata Feisthamel, 1835
Thera georgii Hulst, 1896
Thera gibbiata Constantini, 1926
Thera grisescens Höfer, 1922
Thera guriata Von Emich, 1873
Thera herrichi Höfer, 1922
Thera hospes Djakonov, 1955
Thera infuscata Schwingenschuss, 1926
Thera interrupta Höfer, 1920
Thera ishizukai Inoue, 1955
Thera istriana Naufock, 1913
Thera juniperata Linnaeus, 1758
Thera juniperoides Strand, 1920
Thera kardakovi Krulikovski, 1909
Thera kurilaria Bryk, 1942
Thera latens Barnes & McDunnough, 1917
Thera lienigiaria Lederer, 1853
Thera lisciata Dannehl, 1925
Thera loeberbaueri Friedel, 1969
Thera maculata Höfer, 1920
Thera mediolucens Rössler, 1881
Thera medionigricans Reutti, 1898
Thera minor Maslowscy, 1923
Thera nigra Cockayne, 1933
Thera nigrescens Lempke, 1950
Thera nigrofasciata Prout
Thera nigrolineata Cockayne, 1946
Thera nigrolucens Lempke, 1950
Thera nigrosignata Prout, 1926
Thera obeliscata Hübner, 1787
Thera obliterata B. White, 1878
Thera obscura Lempke, 1950
Thera obsoleta Lempke, 1950
Thera orcadensis Cockayne, 1950
Thera otisi (Dyar)
Thera paradoxa Mehlau, 1964
Thera perversa Hirschke, 1913
Thera peterfii Dioszeghy, 1930
Thera pittneraria Franzenau, 1856
Thera praefecta Prout, 1914
Thera privata Prout, 1938
Thera procteri Brower, 1940
Thera prouti Cockayne, 1927
Thera pseudovariata Heydemann, 1933
Thera purpureobrunnea Cockayne, 1952
Thera reducta Höfer, 1922
Thera resinaria Peyerimhoff, 1862
Thera scotica Höfer, 1920
Thera serraria Zeller, 1846
Thera simulata Hübner, 1800/08
Thera sounkeana Matsumura, 1927
Thera spania Stichel, 1911
Thera stragulata Hübner, 1800/08
Thera subcomis Inoue, 1978
Thera subtaurica Wehrli, 1932
Thera tabulata Püngeler, 1909
Thera taigana Djakonov, 1926
Thera tenuifasciata Osthelder, 1929
Thera tephroptilus Fletcher, 1961
Thera tristrigaria Donovan, 1808
Thera ulicata Rambur, 1834
Thera undulata Warren, 1888
Thera variata Schiffermüller, 1775
Thera variolata Staudinger, 1900
Thera vetustata Schiffermüller, 1775
Thera vitiosata Freyer, 1832
Thera woodi Cockayne, 1927
Thera ziczaccata Schöyen, 1876