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Sphaeropegma Schrammen 1936
urn:lsid:organismnames.com:name:3191457
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Sphaeropegma Schrammen 1936
Schrammen 1936. Die Kieselspongien dee oberen Jura von Sud-deutschland. Palaeontographica Stuttgart, 84A(4-6) 1936: pp. 149-197