Classification of the genus Geragnostus
G. †Geragnostus Howell 1935
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Subg. †Geragnostus (Geragnostella) Kobayashi 1939
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†Geragnostus (Geragnostella) explanatus Tjernvik 1956
†Geragnostus (Geragnostella) tullbergi Novak 1883
†Geragnostus (Geragnostella) wimani Tjernvik 1956
Subg. †Geragnostus (Geragnostus) Howell 1935
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†Geragnostus (Geragnostus) callaveiformis Harrington and Leanza 1957
†Geragnostus (Geragnostus) maurii Harrington and Leanza 1957
†Geragnostus (Geragnostus) nesossii Harrington and Leanza 1957
Subg. †Geragnostus (Microagnostus) Howell 1935
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†Geragnostus (Microagnostus) callaveiformis Harrington and Leanza 1957
†Geragnostus (Microagnostus) calviformis Harrington and Leanza 1957
†Geragnostus (Microagnostus) hoeki Kobayashi 1939
†Geragnostus (Microagnostus) micropeltis Harrington and Leanza 1957
†Geragnostus (Microagnostus) neumanni Harrington and Leanza 1957
†Geragnostus (Microagnostus) tilcuyensis Kobayashi 1937
†Geragnostus (Microagnostus) vilonii Harrington and Leanza 1957
Subg. †Geragnostus (Novoagnostus) Nielsen 1997
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†Geragnostus (Novoagnostus) contractus Zhou et al. 2014
†Geragnostus (Novoagnostus) longicollis Raymond 1925
†Geragnostus boutouryensis Howell 1935
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Invalid names: Geragnostus foulonensis Howell 1935 [synonym], Geragnostus languidus Howell 1935 [synonym], Geragnostus manifestus Howell 1935 [synonym]
†Geragnostus callaveiformis Harrington and Leanza 1957
†Geragnostus crassus Tjernvik 1956
†Geragnostus fabius Billings 1865
†Geragnostus occitanus Howell 1935
Invalid names: Neptunagnostella Pek 1977 [synonym]