Researchers have discovered and described a new species of tetra that hails from the upper Rio Juruena and upper Rio Tapajós basin in Brazil.
Moenkhausia lineomaculata looks somewhat similar to the red-eye tetra (Moenkhausia sanctaefilomenae) but lacks the red eye and striking black caudal peduncle blotch the red eye tetra. According to the researchers, the new species is part of the monophyletic group formed by M. cosmops, M. cotinho, M. diktyota, M. forestii, M. oligolepis, M. sanctaefilomenae, and M. pyrophthalma, the Moenkhausia oligolepis/M. sanctaefilomenae complex. It shares the reticulated color pattern on the body and light caudal peduncle blotch of some of these species.
It features dark dots on the body and a very light, yellowish lateral line that starts at the eye and ends near the tail area. If it is indeed similar to the red-eye tetra, and it looks to be, the fish is 2 to 3 inches in length and lives in water temperatures that range from 70 to 82 degrees Fahrenheit.