Classification of the genus Stygina
G. †Stygina Salter 1853
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Subg. †Stygina (Protostygina) Prantl and Pribyl 1949
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†Stygina (Protostygina) bohemica Barrande 1872
†Stygina angustifrons Warburg 1925
†Stygina latifrons Portlock 1843
†Stygina latifrons extensa Reed 1904
†Stygina minor Skjeseth 1955
†Stygina murchisoni Reed 1914
†Stygina plautoni Schmidt 1904