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A new species of Hyphessobrycon is described from a tributary of the upper Rio Tapajós, Amazon basin, Mato Grosso, Brazil. Its exuberant colour in life, with blue to purple body and red fins, is appreciated in the aquarium trade. Characters to diagnose the new species from all congeners are the presence of a single humeral blotch, absence of a distinct caudal‐peduncle blotch, absence of a well‐defined...
The rediscovery of the enigmatic subterranean characiform Stygichthys typhlops is reported almost a half‐century after the collection of the holotype, the only specimen previously known. Thirty‐four specimens were collected in two shallow hand‐dug wells at the region of the type locality, c. 13 km south‐west of the town of Jaíba, Minas Gerais, Brazil. These specimens provide new information on the...
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