Typhlobelus is a genus of pencil catfishes native to South America.

[3] T. macromycterus is known from the Tocantins River near Tucuruí, Pará State, Brazil.

These fish are markedly miniaturized, yet retain a relatively well-ossified skeleton comparable in both bone differentiation and degree of calcification to that observed in larger trichomycterids.

[3] T. guacamaya is distinguished from all congeners by the presence of three branchiostegal rays (vs. four in T. ternetzi and T. lundbergi, five in T. macromycterus), posterior naris absent (vs. present, nares bilaterally paired), and the lack of pleural ribs (vs. one pair of pleural ribs associated with the first free vertebra).

Typhlobelus has a long duck-billed rostrum that protrudes anteriorly well beyond the bases of the maxillary barbels.