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†Metaptychopyge Balashova 1964
urn:lsid:organismnames.com:name:2555152
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†Metaptychopyge Balashova 1964
Balashova 1964. [Morphology, phylogeny and stratigraphical significance of the early Ordovician subfamily Ptychopyginae of the Baltic area.] Voprosy Paleontologii, 4 1964: 3-56