Pimelodus gagora Arius macracanthus Systematics of the family Ariidae (Ostariophysi, Siluriformes), with a redefinition of the genera. Alexandre P. Marceniuk Naércio A. Menezes Zootaxa 2007 1416 1 126 684PM 591255 Actinopterygii Ariidae Arius Animalia Siluriformes 17 Chordata species gagora   Pimelodus gagoraHamilton, 1822: 167, 376, pl. 10 (fig. 54). Type locality: Bengal estuaries. No types known.  Arius macracanthus Guenther, 1864: 167. Type locality: Thailand. Holotype: BMNH1862.11.222.  Distribution: South and southeast Asia. Countries: India, Bangladesh, Myanmar and Thailand.  Habitat: Brackish and freshwaters.  Maximum size: 1.000 mm TL.   Material examined: UMMZ187892 (4 al, 147-175 mm TL) (1 c&s), Bangladesh, Comilla, Meghna River, Chandpu. 923907034 923907037 Thailand 923907036 Bangladesh 923907039 Bangladesh 923907041 Bangladesh