Excerptiones de gestis Chalcedonensis concilii
The Excerptiones de gestis Chalcedonensis concilii are a highly selective, interpolated abbreviation of the versio Rustici of the acts of the Council of Chalcedon. They were attributed to Verecundus in the editio princeps, but as Zechiel-Eckes has argued convincingly, in fact were produced in the ninth century by the Pseudoisidorian forgers. Strikingly, the copy of the versio Rustici in Paris, BnF, lat. 11611 (saec. IX 1/4, Corbie) contains notes corresponding in many cases to the Excerptiones, and Zechiel-Eckes concluded that it was nothing less than Pseudoisidore‘s Arbeitshandschrift.
Compared to its source, the Excerptiones exaggerate the role of the pope (and papal legates) in convening synods, downplay imperial prerogatives, and generally ignore the theological points at issue.
Many of the 34 known manuscripts are copies of the False Decretals, including Vat. Lat. 630 and New Haven, Yale University, Beinecke Library, 442.
Zechiel-Eckes, Verecundus oder Pseudoisidor? Zur Genese der Excerptiones de gestis Chalcedonensis concilii, DA 56 (2000) pp. 413-446 http://www.digizeitschriften.de/main/dms/img/?PPN=PPN345858735_0056&DMDID=dmdlog40. - Harder, Pseudoisidor pp. 173-180.