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

Clupeiformes

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

Otomorpha

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

Cypriniformes

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

Characiformes

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

Semionotiformes

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

Teleostei

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