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†Protoptychopyge Balashova 1960
urn:lsid:organismnames.com:name:2682865
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†Protoptychopyge Balashova 1960
Balashova 1960. [A new genus Protoptychopyge from the Lower Ordovioian of the Baltic district]. Palebnt Zhurnal Moscow, 1959(4) 1960: 125-129