Classification of the genus Ptychagnostus

G. †Ptychagnostus Jaekel 1909
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Subg. †Ptychagnostus (Acidusus) Opik 1979
Subg. †Ptychagnostus (Ptychagnostus) Jaekel 1909
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Ptychagnostus aculeatus Angelin 1851
Ptychagnostus aksayensis Ergaliev and Ergaliev 2008
Ptychagnostus atavus Tullberg 1880
Ptychagnostus convexus Westergard 1946
Ptychagnostus cuyanus Rusconi 1948
Ptychagnostus intermedius Tullberg 1880
Ptychagnostus karatauensis Ergaliev 1980
Ptychagnostus leptus Qian 1983
Ptychagnostus punctuosus Angelin 1851
Ptychagnostus seminula Whitehouse 1939
Ptychagnostus spinosus Ergaliev 1980