Gymnotiformes

• Animal Diversity Web Order Gymnotiformes  - Provides a classification guide. With images.
• Chromosome Evolution in Fish: Sex Chromosome Variability  - Information on the article, named "Chromosome evolution in fish: sex chromosome variability in Eigenmannia virescens (Gymnotiformes: Sternopygidae).".
• Diversity and Phylogeny of Neotropical Electric Fishes (Gymnotiformes)  - Reviews article by James S. Albert and William G. R. Crampton.
• Funet Network Gymnotiformes  - Provides guide to families.
• Gymnotiformes Electric Fish  - Provides photos of member species and listing of families.
• ITIS Report: Gymnotiformes  - Furnishes data on taxonomic hierarchy and status, nomenclature, resources, and references.
• Knifefishes (Gymnotiformes): Fishes  - Provides list of member species.
• Mikko's Phylogeny Archive Gymnotiformes Neotropical Electric Fishes  - Presents a classification guide.
• Mikko's Phylogeny Archive Gymnotiformes-Families  - Provides classification guide to subgroups.
• Mongabay.com Knifefish  - Provides description and classification guide.
• Order Gymnotiformes Contains These Families:  - Provides a guide to subgroups.
• Phylogenetic Analysis of the South American Electric Fishes (Order Gymnotiformes)  - Provides abstract of the article by Alves-Gomes JA, Orti G, Haygood M, Heiligenberg W, Meyer A.
• Redescription of Apteronotus mariae and the Taxonomic Status of Apteronotus jurubidae [PDF]  - Presents abstract and introduction of the article by Carlos David de Santana and Javier Maldonado-Ocampo.
• Redescription of Gymnotiformes coatesi (Gymnotiformes, Gymnotidae)  - Information on the article by William G. R. Crampton and James S. Albert.
• Redescription of Gymnotus coatesi (Gymnotiformes, Gymnotidae): A Rare Species of Electric Fish  - Information on the article by Crampton, William G. R. and Abert, James S. Provides link to purchase PDF of full text.
• Redescription of Sternopygus obtusirostris (Gymnotiformes: Sternopygidae)  - Information on the article by Willaim G. R. Crampton Kevin G. Hulen and James S. Albert.
• Tree of Life Gymnotiformes  - Discusses classification, phylogenetic relationships and behavior. With illustrations.