Elassoma is a genus of freshwater fish, the only member of subfamily Elassomatinae of the sunfish family Centrarchidae in the order Perciformes. It is sometimes classified as a separate family, the Elassomatidae, in a monotypic suborder, Elassomatoidei, in Perciformes. The type species is E. zonatum, the banded pygmy sunfish. The Elassomatinae are known collectively as pygmy sunfishes, but are considered by some authorities not to be true sunfishes, which are members of family Centrarchidae. Some researchers believe they are related to sticklebacks and pipefishes rather than Perciformes, though genetic research strongly implies a close relationship with the centrarchids. Currently the Integrated Taxonomic Information System classifies them in the family Elassomatidae rather than Centrarchidae.
Petinomys is a genus of flying squirrels. They are known commonly as the dwarf flying squirrels.
Dolichancistrus is a genus of suckermouth armored catfishes native to South America.
Pentapodus setosus, commonly known as the butterfly whiptail, is a marine fish native to the western Pacific Ocean.
Cyclopteropsis brashnikowi is a species of lumpfish native to the Sea of Okhotsk and the Northwest Pacific off of the Kuril Islands, where it is found at a depth of 30 to 303 metres. Adult individuals of the species have been noted to resemble the related species C. popovi, suggesting that the two species names may be synonymous. It is of disputed classification, being considered a species of Eumicrotremus by some authors, although sources such as FishBase, WoRMS, and ITIS do not follow this classification.
Chelonodon dapsilis, known as the plentiful toby, is a species of pufferfish in the family Tetraodontidae. It is native to the Western Pacific, where it is endemic to Australia. It is a tropical fish found in both marine and brackish environments, being known from coastal estuaries, mangrove swamps, and sandy areas in marine waters. The species is reported to be oviparous. ITIS lists this species as a member of the genus Leiodon, although WoRMS and FishBase both include it within Chelonodon. It was first described by Gilbert Whitley in 1943, from a specimen collected from the Fitzroy River, in Queensland.
Ancistrus caucanus is a species of catfish in the family Loricariidae. It is native to South America, where it was at one point thought to occur in the Cauca River basin in Colombia, for which it is named, although subsequent research suggested in 2013 that it is actually native to the Magdalena River basin, whereas its congener Ancistrus vericaucanus is the species native to the Cauca. The species reaches 5.2 cm SL. It is not to be confused with the similarly named species Lasiancistrus caucanus.
Chaetostoma loborhynchos is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Tambo River basin, which is part of the Ucayali River drainage in Peru. The species reaches 14.2 cm SL. It is the type species of the genus Chaetostoma.
Chaetostoma lepturum is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the San Juan River basin in Colombia. The species reaches 21.5 cm SL.
Dolichancistrus atratoensis is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Atrato River basin in Colombia. The species reaches 8.2 cm SL and reportedly inhabits high-altitude environments.
Dolichancistrus carnegiei is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Magdalena River basin in Colombia. The species reaches 17 cm in total length.
Dolichancistrus cobrensis is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Catatumbo River basin in the Lake Maracaibo drainage in Venezuela. The species reaches 7.9 cm SL.
Dolichancistrus fuesslii is a species of catfish in the family Loricariidae. It is a freshwater fish native to South America, where it is known only from Colombia. The species reaches 13.1 cm in total length.
Dolichancistrus pediculatus is a species of catfish in the family Loricariidae. It is a freshwater fish native to South America, where it occurs in the Meta River basin in Colombia. The species reaches 12 cm in total length.
Peckoltia oligospila is a species of catfish in the family Loricariidae. It is a freshwater fish native to South America, where it occurs in the lower Amazon River basin in Brazil. The species reaches 10.5 cm SL. It appears in the aquarium trade, where it is typically referred to either by its associated L-number, which is L-006, or as the brown-dot peckoltia.
Hypostomus annectens is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Cayapas River basin in Ecuador and the Patía River basin in Colombia. The species reaches 28 cm in total length and is believed to be a facultative air-breather. It is listed by ITIS as a member of Hemiancistrus as opposed to Hypostomus, which it is classified under according to FishBase.
Hypostomus scaphyceps is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Paranapanema River basin. FishBase states that the maximum length attained by the species is 3.5 cm SL, although that measurement has elsewhere been suggested to originate from a juvenile specimen, and as such the species can likely reach a size larger than that when fully grown.
Hypostomus ancistroides is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Tietê River basin. The species reaches 21 cm in total length and is believed to be a facultative air-breather.
Hypostomus iheringii is a species of catfish in the family Loricariidae. It is native to South America, where it is occurs in the Paraná River drainage basin, being known from the Tietê River basin as well as the Corumbá River, where it is syntopic with Hypostomus ancistroides, H. denticulatus, H. heraldoi, H. margaritifer, and H. regani. The species reaches 11.6 cm in standard length and is believed to be a facultative air-breather.
Hypostomus margaritifer is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the upper and middle Paraná River basin. The species reaches 33 cm (13 in) in total length and is believed to be a facultative air-breather. It is known to be syntopic with other loricariid species in the genus Hypostomus, including Hypostomus ancistroides, H. denticulatus, H. heraldoi, H. iheringii, and H. regani.
