Spectracanthicus Nijssen & Isbrücker, 1987

Chamon, Carine C. & Rapp Py-Daniel, Lúcia H., 2014, Taxonomic revision of Spectracanthicus Nijssen & Isbrücker (Loricariidae: Hypostominae: Ancistrini), with description of three new species, Neotropical Ichthyology 12 (1), pp. 1-25 : 2

Spectracanthicus Nijssen & Isbrücker, 1987

Spectracanthicus Nijssen & Isbrücker, 1987: 93 . Type species: Spectracanthicus murinus Nijssen & Isbrücker, 1987 by original designation and monotypy. Gender masculine.

Oligancistrus Rapp Py-Daniel, 1989: 246 . Type species: Chaetostomus punctatissimus Steindachner, 1881 by original designation and monotypy. Gender masculine.

Diagnosis. Spectracanthicus is diagnosed from all other Ancistrini , except Baryancistrus niveatus and B. beggini , and Parancistrus by the presence of an expansion of dorsal-fin membrane connecting the last dorsal-fin ray of to the adipose-fin spine (vs. dorsal fin not expanded and connected to adipose). Spectracanthicus is distinguished from Baryancistrus by having up to 25 teeth on premaxilla (vs. more than 25); and from Parancistrus by having small gill opening, reaching up to 1 / 3 of cleithrum length (vs. large gill opening, reaching nearly 1 / 2 of cleithrum length).