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Pholidophoridae
Pholidophoridae is an extinct family of primitive stem-teleost fish that lived during the Triassic period. Most of the genera are from the Late Triassic (Carnian and Norian ages) of Europe, but one ('' Malingichthys'') is known from the Middle Triassic (Ladinian) of China. The pholidophorids were historically united with several other stem-teleost lineages into the order Pholidophoriformes; however, Pholidophoriformes in its traditional sense is now thought to be paraphyletic with respect to crown group teleosts. Phylogeny Below is a cladogram A cladogram (from Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an evolutionary tree because it does not show how ancestors are related to d ... simplified after Bean (2021): References Prehistoric ray-finned fish families Ladinian first appearances Norian extinctions Taxa named by Arthur Smith Woodward {{Tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pholidorhynchodon Malzanni
''Pholidorhynchodon'' is an extinct genus of ray-finned fish that lived in the Triassic. Its fossils have been found in Italy, in the Zorzino Limestone Formation in Cene. Significance ''Pholidorhynchodon'' belongs to a group of fish that are right at the very base of the teleosts. Teleost fish include almost all living fish species, and have their origins in the Triassic. This makes ''Pholidorhynchodon'' important because it provides information about the early evolution and development of this important group.Arratia, G., 2017New Triassic teleosts (Actinopterygii, Teleosteomorpha) from northern Italy and their phylogenetic relationships among the most basal teleosts ''Journal of Vertebrate Paleontology'', 37(2), p.e1312690 See also * Prehistoric fish * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pholidorhynchodon
''Pholidorhynchodon'' is an extinct genus of ray-finned fish that lived in the Triassic. Its fossils have been found in Italy, in the Zorzino Limestone Formation in Cene. Significance ''Pholidorhynchodon'' belongs to a group of fish that are right at the very base of the teleosts. Teleost fish include almost all living fish species, and have their origins in the Triassic. This makes ''Pholidorhynchodon'' important because it provides information about the early evolution and development of this important group.Arratia, G., 2017New Triassic teleosts (Actinopterygii, Teleosteomorpha) from northern Italy and their phylogenetic relationships among the most basal teleosts ''Journal of Vertebrate Paleontology'', 37(2), p.e1312690 See also * Prehistoric fish * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parapholidophorus
''Parapholidophorus'' is an extinct genus of prehistoric bony fish. See also * Prehistoric fish * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply as List College, is the undergraduate school of the J ... References Pholidophoridae Prehistoric ray-finned fish genera {{paleo-rayfinned-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pholidophorus
''Pholidophorus'' (from el, φολῐ́ς , 'horny scale' and el, φέρω , 'to bear') is an extinct genus of stem-teleost fish. Numerous species were assigned to this genus in the past, but only the type species ''Pholidophorus latiusculus'', from the Late Triassic of Europe, is considered to be a valid member of the genus today. Taxonomy The genus ''Pholidophorus'' for a long time served as a wastebasket taxon containing various unrelated species of basal stem-teleosts. Over the years, many of these have been moved to separate genera. The Late Jurassic nominal species ''"Pholidophorus" purbeckensis'' was renamed '' Ichthyokentema'' by Arthur Woodward in 1941. Likewise, the Early Jurassic form ''"Pholidophorus" bechei'' was renamed '' Dorsetichthys'' and moved to its own family, Dorsetichthyidae, by Arratia (2013). The nominal species ''"Pholidophorus" friedeni'' Delsate, 1999 and ''"Pholidophorus" gervasuttii'' Zambelli, 1980 were renamed '' Luxembourgichthys'' and '' Lombar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pholidophoretes
''Pholidophoretes'' is an extinct genus of prehistoric ray-finned fish that lived during the Carnian stage of the Late Triassic epoch. See also * Prehistoric fish * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply as List College, is the undergraduate school of the J ... References External links * Pholidophoridae Prehistoric ray-finned fish genera Late Triassic fish Triassic fish of Europe {{triassic-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pholidoctenus
''Pholidoctenus'' is an extinct genus of prehistoric ray-finned fish. See also * Prehistoric fish * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply as List College, is the undergraduate school of the J ... References Pholidophoridae Prehistoric ray-finned fish genera {{paleo-rayfinned-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraphyletic
In taxonomy (general), taxonomy, a group is paraphyletic if it consists of the group's most recent common ancestor, last common ancestor and most of its descendants, excluding a few Monophyly, monophyletic subgroups. The group is said to be paraphyletic ''with respect to'' the excluded subgroups. In contrast, a monophyletic group (a clade) includes a common ancestor and ''all'' of its descendants. The terms are commonly used in phylogenetics (a subfield of biology) and in the tree model of historical linguistics. Paraphyletic groups are identified by a combination of Synapomorphy and apomorphy, synapomorphies and symplesiomorphy, symplesiomorphies. If many subgroups are missing from the named group, it is said to be polyparaphyletic. The term was coined by Willi Hennig to apply to well-known taxa like Reptilia (reptiles) which, as commonly named and traditionally defined, is paraphyletic with respect to mammals and birds. Reptilia contains the last common ancestor of reptiles a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crown Group
In phylogenetics, the crown group or crown assemblage is a collection of species composed of the living representatives of the collection, the most recent common ancestor of the collection, and all descendants of the most recent common ancestor. It is thus a way of defining a clade, a group consisting of a species and all its extant or extinct descendants. For example, Neornithes (birds) can be defined as a crown group, which includes the most recent common ancestor of all modern birds, and all of its extant or extinct descendants. The concept was developed by Willi Hennig, the formulator of phylogenetic systematics, as a way of classifying living organisms relative to their extinct relatives in his "Die Stammesgeschichte der Insekten", and the "crown" and "stem" group terminology was coined by R. P. S. Jefferies in 1979. Though formulated in the 1970s, the term was not commonly used until its reintroduction in 2000 by Graham Budd and Sören Jensen. Contents of the crown gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carnian
The Carnian (less commonly, Karnian) is the lowermost stage of the Upper Triassic Series (or earliest age of the Late Triassic Epoch). It lasted from 237 to 227 million years ago (Ma). The Carnian is preceded by the Ladinian and is followed by the Norian. Its boundaries are not characterized by major extinctions or biotic turnovers, but a climatic event (known as the Carnian pluvial episode characterized by substantial rainfall) occurred during the Carnian and seems to be associated with important extinctions or biotic radiations. Stratigraphic definitions The Carnian was named in 1869 by Mojsisovics. It is unclear if it was named after the Carnic Alps or after the Austrian region of Carinthia (''Kärnten'' in German) or after the Carnia historical region in northwestern Italy. The name, however, was first used referring to a part of the Hallstatt Limestone cropping out in Austria. The base of the Carnian Stage is defined as the place in the stratigraphic record where t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cladogram
A cladogram (from Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an evolutionary tree because it does not show how ancestors are related to descendants, nor does it show how much they have changed, so many differing evolutionary trees can be consistent with the same cladogram. A cladogram uses lines that branch off in different directions ending at a clade, a group of organisms with a last common ancestor. There are many shapes of cladograms but they all have lines that branch off from other lines. The lines can be traced back to where they branch off. These branching off points represent a hypothetical ancestor (not an actual entity) which can be inferred to exhibit the traits shared among the terminal taxa above it. This hypothetical ancestor might then provide clues about the order of evolution of various features, adaptation, and other evolutionary narratives about ance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teleosteomorpha
Neopterygii (from Greek νέος ''neos'' 'new' and πτέρυξ ''pteryx'' 'fin') is a subclass of ray-finned fish (Actinopterygii). Neopterygii includes the Holostei and the Teleostei, of which the latter comprise the vast majority of extant fishes, and over half of all living vertebrate species. While living holosteans include only freshwater taxa, teleosts are diverse in both freshwater and marine environments. Many new species of teleosts are scientifically described each year. Fossil evidence for crown group neopterygians goes back at least 251 million years to the Induan stage of the Early Triassic epoch, however, one study incorporating morphological data from fossils and molecular data from nuclear and mitochondrial DNA, places this divergence date at least 284 mya (million years ago), during the Artinskian stage of the Early Permian. Another study suggests an even earlier split (360 myr ago, near the Devonian- Carboniferous boundary). Evolution and diversity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
