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Six populations of  Gymnocalycium paraguayense and G. fleischerianum , endemics of Paraguay and until present considered ad two different species,were studies using macromorphology, micromorphology and molecular data ba...

Subjects / keywords: NELSON, GARETH; COLUMBIA UNIVERSITY PRESS; 570.1 N423s

Subjects / keywords: MAYR, ERNST; COLUMBIA UNIVERSITY PRESS; 599.938 M474s

Subjects / keywords: ALMEDA, FRANK; UNIVERSITY OF CALIFORNIA PRESS; 584 A478s

Subjects / keywords: DUDLEY, PATRICIA L; UNIVERSITY OF WASHINGTON PRESS; 595.34 D848d

Prosierola rotunda sp. nov. from northern Brazil is described and illustrated. Additional specimens of P. lata (Cameron, 1888) were examined with species variation analyzed and new distribution data are added.