Description of Labeo latebra (Cyprinidae) from the Nile River in Sudan
A new Labeo species was discovered during surveys conducted on the Nile basin in Sudan between 2006 and 2016. It is described herein as Labeo latebra sp. nov. It differs from all other Labeo species of the Nile basin by having only 12, rarely 13, scales around the caudal peduncle (instead of 16 or more), and from all Labeo species occurring in the Nile River except L. meroensis by having only 4.5, rarely 5.5, scales between lateral line and dorsal fin base (vs. 6.5-7.5 in L. forskalii and L. coubie, 6.5-8.5 in L. horie, and 8.5-9.5 in L. niloticus). It can be distinguished from L. meroensis by 34-37 scales in lateral line (vs. 39-41 in L. meroensis). Compared to other species of the genus in the Main Nile, the rostral flap is largely fused with the lip and has only a small free part. Labeo latebra sp. nov. is a rather compact and cylindrical Labeo species with a weakly swollen snout while all other Nilotic Labeo species have a clearly elongate appearance and a laterally compressed body.