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Sarcopterygii — sometimes considered synonymous with Crossopterygii — is a taxon of the bony fish known as the lobe-finned fish or sarcopterygians, characterised by prominent muscular limb buds (lobes) within the fins, which are supported by articulated appendicular skeletons. This is in contrast to the other clade of bony fish, the Actinopterygii, which have only skin-covered bony spines (lepidotrichia) supporting the fins.
Hyneria is a genus of large prehistoric predatory lobe-finned fish which lived in freshwater during the Devonian period (Famennian).
Tristichopterids (Tristichopteridae) were a diverse and successful group of tetrapodomorph fishes living throughout the Middle and Late Devonian. They first appeared in the Eifelian stage of the Middle Devonian. Within the group sizes ranged from a few tens of centimeters (Tristichopterus) to several meters.
Edward B. 'Ted' Daeschler is an American vertebrate paleontologist and Associate Curator and Chair of Vertebrate Biology at the Academy of Natural Sciences in Philadelphia. He is a specialist in fish paleontology, especially in the Late Devonian, and in the development of the first limbed vertebrates. He is the discoverer of the transitional fossil tetrapod Hynerpeton bassetti, and a Devonian fish-like specimen of Sauripterus taylori with fingerlike appendages, and was also part of a team of researchers that discovered the transitional fossil Tiktaalik.
Obruchevichthys is an extinct genus of tetrapod from Latvia during the Late Devonian. When the jawbone, the only known fossil of this creature, was uncovered in Latvia, it was mistaken as a lobe-fin fish. However, when it was analyzed, it proved to hold many similarities to Elginerpeton, from Scotland. It was then declared belonging to the earliest group of tetrapods.
Livoniana is a genus of prehistoric lobe-finned fish which lived during the Devonian period.
The Canowindridae are a family of prehistoric lobe-finned fishes which lived during the Devonian period. Fossils of fishes that belonged to this family have been found in Australia, Antarctica, and Europe.
Bukkanodus jesseni is a species of prehistoric lobe-finned fish which lived during the Early Devonian period. B. jesseni was first described in 2007 by paleontologist Zerina Johanson in the Journal of Paleontology from specimens found in the Fairy Formation of Victoria, Australia.
Porolepiformes is an order of prehistoric lobe-finned fish which lived during the Devonian period. They are thought to represent the sister group to lungfish. The group contains two families: Holoptychiidae and Porolepididae.
Osteolepididae is a family of primitive, fish-like tetrapodomorphs that lived during the Devonian period. The family is generally thought to be paraphyletic, with the traits that characterise the family being widely distributed among basal tetrapodomorphs and other osteichthyans. Some of genera historically placed in Osteolepididae have more recently been assigned to the family Megalichthyidae, which appears to be a monophyletic group.
Koharalepis is a prehistoric lobe-finned fish which lived during the Devonian period.
Gogodipterus is an extinct genus of prehistoric lungfish in the family Chirodipteridae. It was discovered at the Late Devonian Gogo Formation of Western Australia.
Ganopristodus is an extinct genus of prehistoric sarcopterygian or lobe-finned fish from the Devonian.
Westollrhynchus is an extinct genus of prehistoric sarcopterygians or lobe-finned fish containing only one recognized species, Westrollrhynchus lehmanni.
Sorbitorhynchus is an extinct genus of prehistoric sarcopterygians, or lobe-finned fish. Fossils of this genus of marine lungfish have been found in Guangxi, China. The only described species in this genus is Sorbitorhynchus deleaskitus, but the holotype for this species may show some unusual malformations and thus not be useful for taxonomic or phylogenetic analysis.
Stegotrachelus is an extinct genus of prehistoric bony fish that lived during the Middle Devonian epoch in what is now Shetland, Scotland.
Ligulalepis is an extinct genus of prehistoric bony fish. Ligulalepis was first described from isolated scales found in the Taemas-Wee jasper limestones of New South Wales by Dr Hans-Peter Schultze (1968) and further material described by Burrow (1994). A nearly complete skull found in the same general location was described in Nature by Basden et al. (2000) claiming the genus was closely related to basal ray-finned fishes (Actinopterygii). In 2015 Flinders University student Benedict King found a more complete new skull of this genus which was formally described by Clement et al. (2018), showing the fish to be on the stem of all osteichthyans.
The Thunder Bay Limestone is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
Bungartius is an extinct genus of armoured, jawed fishes from the Late Devonian period of Ohio. Bungartius is thought to have been durophagous.
References
- Lebedav, O. A., 1983, A new Crossopterygian Fish from the Central Devonian Region: Paleontological Journal, v. 16, part 4, p. 63-70. (Chrysolepis orlensis)
