Abstract
Recently the complex of 'large', hexaploid barbs (genus Barbus) of Lake Tana, Ethiopia, was revised as 14 species (NAGELKERKE & SIBBING, 1997), seven of which were new. This paper describes another new species, Barbus osseensis and summarises the major features of the former new species (B. crassibarbis, B. megastoma, B. longissimus, B. tsanensis, B. brevicephalus, B. truttiformis, and B. platydorsus). Figures of all fifteen large barb species of Lake Tana are presented, and an identification key for specimens larger than 15 cm standard length is provided. The position of the large hexaploid barbs within the genus Barbus is discussed.
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