Glanapteryx Listrura Pygidianops Typhlobelus The Glanapteryginae are a subfamily of catfishes (order Siluriformes) of the family Trichomycteridae.

[1] Monophyly of the subfamily is supported by five synapomorphies involving reductions in the fins, caudal skeleton, and laterosensory system.

[2] Pygidianops and Typhlobelus are the most modified glanapterygines, sharing extreme reduction or loss of pigmentation, fins, laterosensory system, and eyes; they are also miniaturized, yet retain the well-ossified skeleton comparable in both bone differentiation and degree of calcification to that observed in larger trichomycterids.

[1] Glanapterygine phylogeny indicates the evolution of the group followed a trend of decreasing dependence on leaf litter and increasing association with sand.

Listrura species occur in shallow-water leaf-litter deposits underlain by mud or deeper layers of leaf litter.