The Influence of Alloying Elements on Aluminum Anodes in Sea Water

Abstract

We examined karyotypes of 10 attine ant species of six genera collected from Barro Colorado Island, Panama. The karyotypic data are as follows; Atta colombica (n = 11, 2n = 22; 18 M+4A), Sericomyrmex amabalis (2n = 50; 50 M), Trachymyrmex septentrionalis (n = 10, 2n = 20; 20 M), T. sp. 1 (n = 6, 2n = 12; 12 M), T. sp. 2 (2n = 18; 18 M), Cyphomyrmex rimosus (2n = 32; 28 ?M+4 ?A), C. costatus (2n = 20; 20 M), Apterostigma mayri (2n = 24; 24 M), Ap. sp. (2n = 24; 24 M), and Mycocepurus sp. (2n = 8; 8 M). C-bands are localized at centromeric region in all chromosomes in C. costatus and Ap. mayri, while At. colombica, S. amabalis and T. sp. 1 carry additional interstitial C bands in 4, 10 and 4 chromosomes, respectively, suggesting the occurrence of tandem fusion in these chromosomes.