- Nannostomus anduzei
- Nannostomus beckfordi, Golden Pencilfish
- Nannostomus bifasciatus, Whiteside Pencilfish
- Nannostomus britskii, Spotstripe Pencilfish
- Nannostomus digrammus, Twostripe Pencilfish
- Nannostomus eques, Brown Pencilfish
- Nannostomus espei, Barred Pencilfish
- Nannostomus harrisoni, Blackstripe Pencilfish
- Nannostomus limatus, Elegant Pencilfish
- Nannostomus marginatus, Dwarf Pencilfish
- Nannostomus marilynae, Greenstripe Pencilfish
- Nannostomus minimus, Least Pencilfish
- Nannostomus nitidus, Shining Pencilfish
- Nannostomus trifasciatus, Threestripe Pencilfish
- Nannostomus unifasciatus, Oneline Pencilfish
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