The Teleost Fuse

A while back, I discussed the group of fish known as the Holostei, the gars and bowfin. The Holostei constitute one branch of the clade Neopterygii which includes the majority of living ray-finned fishes. However, their success in the modern environment pales in comparison to that of their sister group, the Teleostei. Siemensichthys macrocephalus, an… Continue reading The Teleost Fuse


Reconstruction of Birgeria, copyright DiBgd.Belongs within: Actinopterygii. Contains: Neopterygii, Palaeonisciformes, Acipenseriformes. The Actinopteri are a clade of fishes including all modern ray-finned fishes with the exception of the bichirs of the Polypteridae. Members of this clade have the premaxilla confined to a region anterior to the orbit, parasphenoid teeth absent, and proximal radials of the… Continue reading Actinopteri


Chinese herring Ilisha elongata, copyright J. E. Randall. Belongs within: Otomorpha. Contains: Clupeidae, Stolephorus, Anchovia, Coilia, Thryssa. The Clupeiformes, herring, anchovies and related taxa, are a cosmopolitan group of mostly marine fishes that usually bear silvery deciduous scales. Characters (from Bond 1996): Scales cycloid, usually silvery, deciduous, often modified into posteriorly directed scutes along mid-line… Continue reading Clupeiformes


Diplomystus dentatus, copyright Yinan Chen. Belongs within: Osteoglossocephalai. Contains: Alepocephaliformes, Ostariophysi, Clupeiformes. The Otomorpha are a clade of ray-finned fishes primarily supported by molecular data, members of which commonly have silvery areas associated with the swim bladder. <==Otomorpha [Ostarioclupeomorpha, Otocephala] B-RB13 |–+–Alepocephaliformes B-RB13 |  `–Ostariophysi B-RB13 `–Clupeomorpha B96 |–Clupeiformes B-RB13 `–Ellimmichthyidae [Ellimmichthyiformes, Paraclupeidae] B96 |–Paraclupea chetungensis… Continue reading Otomorpha


Chinese algae eater Gyrinocheilus aymonieri, copyright Garthhh.Belongs within: Ostariophysi. Contains: Balitoridae, Cobitidae, Catostomidae, Puntius, Labeo, Cyprininae, Gobioninae, Acheilognathinae, Leuciscinae, Barbinae. The Cypriniformes are a cosmopolitan group of freshwater fishes that lack teeth in the front of the mouth. Characters (from Bond 1996): Mouth teeth absent; lower pharyngeal bones sickle-shaped, with teeth that usually bite upwards… Continue reading Cypriniformes


Silversides Alestes baremose, copyright Marc Towers. Belongs within: Ostariophysi. Contains: Characidae. The Characiformes are a group of tropical freshwater fish found in Africa and the Neotropical region. Characters (from Bond 1996): Orbitosphenoid, parietal, symplectic and subopercular bones present; jaw teeth present, opposing pharyngeal teeth usually present; barbels absent; first hypural separated from compound ural centrum;… Continue reading Characiformes


Lepidotes elvensis, copyright Ghedoghedo.Belongs within: Holostei. The Semionotiformes are a group of fishes including the modern gars and their fossil relatives, united by the absence of the intercalar and gular bones, the presence of a series of antorbitals anterior to the circum-orbital ring, and enlarged basal and fringing fulcra (Cavin 2010). <==Semionotiformes [Ginglymodi, Semionotoidei] |  i.… Continue reading Semionotiformes


Belongs within: Neopterygii.Contains: Pachycormidae, Elopomorpha, Osteoglossocephalai. The Teleostei are a clade including the majority of living ray-finned fishes. Teleosts are characterised by the presence of one or more uroneurals, modifications of the vertebral neural arches that support the caudal fin. Early members include the Mesozoic Pholidophoriformes, small fishes up to forty centimetres long that retain… Continue reading Teleostei