Revision of Mesozoic Myodocopina (Ostracoda) and a new genus and species, Mesoleberis hollandica, from the Upper Cretaceous of Belgium and The Netherlands Author Kornicker, Louis S. Author Van, Barry W. M. Author Bakel Author Fraaije, René H. B. Author Jagt, John W. M. text Zootaxa 2006 1246 15 54 journal article 50616 10.5281/zenodo.172935 9913fef5-73fb-4525-a3a6-63ad2742ea71 1175­5326 172935 Subfamily Polycopinae Sars 1866 Composition This subfamily contains numerous genera. Range Paleozoic to Recent. Remarks Absence of central adductor muscle scars on the carapaces and absence of appendages of the two Mesozoic species included herein do not permit certain identification of genus, so they have been placed tentatively in the genus Polycope .