are ray-finned fishes jawed vertebrates

The bony fish evolved into two separate groups : the Actinopterygii (or ray-finned fish ) and Sarcopterygii (which includes the lobe-finned fish ). Actinopterygii: ray-finned fish: Actinopterygii, members of which are known as ray-finned fishes, is a class or subclass of the bony fishes. The evolution of the vertebrate cerebellum: absence of a ... Jawed Vertebrate Eel - like scavengers (Decomposers). The lobe-finned fishes are the sister group to the ray-finned fishes. jawed vertebrates with gills and paired fins include... sharks, ray-finned fishes, lobe-finned fishes. lamprey "Old Red Continent" of Euramerica. In most bony fish, the gases of the swim bladder are exchanged directly with the blood. Specifically, our sampling included cyclostomes (jawless fishes; lamprey) and gnathostomes (jawed vertebrates) from chondrichthyes (cartilaginous fishes), ray-finned fishes, lobe-finned fishes and tetrapods (amphibians, reptiles, birds and mammals). Fossils of early gnathostomes (or jawed vertebrates) have been the focus of study for nearly two centuries. The hard facts of the fossil record lend absolutely no support to the evolutionary transition from jawless to jawed vertebrates. However, it has long been postulated that many of these innovations evolved in the ancestors of bony vertebrates (ray-finned fishes, lobe-finned fishes, and tetrapods) and thus still are present in some living basal groups of actinopterygians (ray-finned fishes) ( Graham et al., 2014; Takeuchi et al., 2009; Zaccone et al., 2009 ). 2. Lancelets and coelacanths are more closely related than are chimaeras and coelacanths. Indicate which of these terminal groups are Craniates, Vertebrates (restricted sense), Gnathastomes (jawed vertebrates), Osteichthys (bony "fishes"), and Sarcopterygii (lobe-finned "fishes"). Introduction. In jawed vertebrates, a five-part gill skeleton is bilaterally present for each gill arch. Skeleton = Cartilage. The latter taxon includes sarcopterygians (coelacanths, lungfishes, and tetrapods) and actinopterygians (ray-finned fishes). It thus represents an excellent basal in-group with which to reconstruct the likely ancestral ray-finned fish condition. Gnathostomes: Jawed Fishes Gnathostomes , or “jaw-mouths,” are vertebrates that possess true jaws—a milestone in the evolution of the vertebrates. a. Chondrichthyans b. ray-finned fishes c. bony fishes d. lobe-finned fishes They are active feeders, rather than sessile, suspension feeders. The jawed vertebrates (gnathostomes) fall into two major taxa, the Chondrichthyes (cartilaginous fishes) and Osteichthyes (bony fishes). Fishes were the earliest vertebrates, and jawless fishes were the earliest of these. Vertebrate jaws evolved from the cartilaginous, anterior gill arches In fishes, the posterior arches remain as skeletal supports of the gills. sensory organ that allows sharks to detect electromagnetic fields produced by living things. There are more fish than tetrapods (land vertebrates): there are over 33,000 described species of fish. Now the term covers five classes of aquatic vertebrates: Jawless fish Armoured fish Cartilaginous fish Ray-finned fish Lobe-finned fish. Primitive shark-like fishes and the early evolutionary radiation of jawed fishes (gnathostomes). The origin and early radiation of tetrapods, the origin of a tetrapod body plan, and the fin-to-limb evolutionary transition. Slime glands = Escape Predation. Cartilaginous fishes include sharks, rays, skates, and ghost sharks. Ray-finned fishes are named for their fins that are webs of skin supported by bony spines called rays. Evolved 550 mya. The ancestors of modern jawed vertebrates are commonly portrayed as fishes with a shark-like appearance. Agnatha (Jawless Fish) These jawless creatures are very primitive in nature. Most modern fishes have jaws. But a stunning fossil discovery from China puts a new face on the original jawed vertebrate. Osteichthyes is divided into the ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii). ACTINOPTERYGII (ray-finned fishes) Superclass: GNATHOSTOMATA (jawed craniates) Subphylum: VERTEBRATA (vertebrates) Phylum: CHORDATA (vertebrates) Superphylum: DEUTEROSTOMIA (deuterostomes) Clade: Bilateria (bilaterally symmetrical animals) Subkingdom: EUMETAZOA (metazoans) Kingdom: ANIMALIA (animals) Domain: Eukaryota (eukaryotes) Life The three main groups of jawed fishes are Cartilaginous Fishes (Chondrichthyes - sharks, skates and rays) Lobe-finned fishes (Lungfish, Coelacanth) Ray-finned Fishes (more than 28,000 species) The gills lie behind and to the side of the mouth cavity and consist of fleshy filaments supported by the gill arches and filled with blood vessels, which give gills a bright red colour. The hard facts of the fossil record lend absolutely no support to the evolutionary transition from jawless to jawed vertebrates. The traditionally accepted relationships among basal jawed vertebrates have been challenged by some molecular phylogenetic analyses based on mitochondrial sequences. ... (ray finned fish) Tilapia, bass, catfish, grouper etc. Jawless fishes—the present day hagfishes and lampreys—have a distinct cranium and complex sense organs including eyes, distinguishing them from the invertebrate chordates. Within the jawed vertebrates (gnathostomes), electrosensory “ampullary organs” are found in all cartilaginous fishes (chondrichthyans), i.e., sharks, batoids (rays, skates) and holocephalans, and in some lineages of non-teleost bony fishes (osteichthyans), both in the lobe-finned (sarcopterygian) clade - coelacanths, lungfishes, salamanders, caecilians; and in the ray … We have determined Hb buffer values across a wide range of vertebrates, including teleosts and basal ray-finned fishes. In existence for about 400 million years, since the Early Devonian, it consists of some 42 orders containing more than 480 families, at least 80 of which are known only from fossils. jawed fish. In most bony fish, the gases of the swim bladder are exchanged directly with the blood. This clade of vertebrates are jawed fish with cartilaginous skeletons: A. Petromyzontidae (lampreys) B. Tooth jaw originates from ectoderm. Trilobites and armoured agnaths decline, while jawed fishes (placoderms, lobe-finned and ray-finned fish, and early sharks) rule the seas. Within eel-like jawless fish that live on the ocean floor and are scavengers. gnathostome. Chondrichthyes: Cartilaginous Fishes. The jawed fish that are still extant in modern days also appeared during the late Silurian: the Chondrichthyes (or cartilaginous fish) and the Osteichthyes (or bony fish). 2. Osteichthyes is a class of jawed fishes having a bony endoskeleton. Sharks are their relatives are jawed fishes with a cartilage skeleton. Transcriptome analyses confirm the homology between the lung and swim bladder and reveal the presence of functional lung-related genes in early ray-finned fishes. Which lineage of jawed vertebrates has gills, flexible skeletons made of cartilage, and contains sharks as an example? 3 , node 1). Jawed Fishes - Division Teleostei. The Acanthomorpha or spiny-rayed fishes, a branch of the fourth subdivision, contains most of the species of teleosts. Subdivision Osteoglossomorpha Two orders of freshwater fishes. • Hiodontiformes with one family and 2 species ( goldeye and mooneye), both in Canada. Chondrichthyes: Cartilaginous Fishes. 20 species of hagfish. Below is a cladogram to show these relationships: Ancestral records clearly show us that terrestrial vertebrates evolved from lobe-finned fishes nearly 400 million years ago. They comprise over 50% of living vertebrate species.. Gnathostomes: Origin of the Vertebrate Jaw The jawed vertebrates, or gnathostomes, are a monophyletic group including five major living lineages; the cartilaginous fishes, ray-finned fishes, coelacanths, lungfishes, and tetrapods. Each of the five classes has distinguishing characteristics that allow members to be classified appropriately. The other group of jawed fishes are cartilaginous fishes, which are included in the class Chondrichthyes. IgM is the most ancient antibody class found in all jawed vertebrates; with the exception of coelacanths, which is the only known jawed vertebrate that does not contain IgM in the genome (171–173). Chondrichthyes are jawed fishes that possess paired fins and a skeleton made of cartilage. ... A _____ _____ is a gas-filled sac that allows ray-finned fishes to maintain their buoyancy. Among Euteleostomi (bony vertebrates), Actinopterygii (ray finned-fishes) branch has lost ENaC genes. Background: Comparative genomic studies suggest that the modern day assemblage of ray-finned fishes have descended from an ancestral grouping of fishes that possessed 12-13 linkage groups. Bony fishes are further divided into two extant clades: Class Actinopterygii (ray-finned fishes) and Class Sarcopterygii (lobe-finned fishes). Traditionally (Figure 1a), extant jawed vertebrates (gnathostomes) were divided into Chondrichthyes (cartilaginous fishes) and the Osteichthyes (bony vertebrates).The Chondrichthyes have cartilaginous skeletons, separate gill … A few of the ray-finned fish left their water abode and ventured onto the land, thus becoming the ancestors for all terrestrial vertebrates. Actinopterygii (Figure 6a), the ray-finned fishes, include many familiar fishes—tuna, bass, trout, and salmon among others—and represent about half of all vertebrate species. They are characterized by their paired, fleshy pectoral, and pelvic fins that are each articulated via a single bone. 61 ancestor of jawed vertebrates and conserved in the common ancestor of ray-finned fishes. The vertebrate species now living represent only a small portion of the vertebrates that have existed. However, the oxytocin homologs are much more diverse: it is isotocin in teleost fishes (e.g., fugu) and other ray-finned fishes (e.g., bichir), mesotocin in non-eutherian tetrapods, and mesotocin and [Phe 2]mesotocin in lungfishes [8–10]. Yet, most animals in the Sarcopterygii (lobe-finned fish) branch including Tetrapoda, amphibians and amniotes (lizards, crocodiles, birds, and mammals), have four ENaC paralogs. ACTINOPTERYGII (ray-finned fishes) Superclass: GNATHOSTOMATA (jawed craniates) Subphylum: VERTEBRATA (vertebrates) Phylum: CHORDATA (vertebrates) Superphylum: DEUTEROSTOMIA (deuterostomes) Clade: Bilateria (bilaterally symmetrical animals) Subkingdom: EUMETAZOA (metazoans) Kingdom: ANIMALIA (animals) Domain: Eukaryota (eukaryotes) Life The clade Chondrichthyes is diverse, consisting of sharks ( [Figure 4] ), rays, and skates, together with sawfishes and a few dozen species of fishes called chimaeras, or “ghost” sharks.”. Vertebrates consist of jawless aquatic animals and jawed vertebrates, which include the cartilaginous (Soft bone) fishes (rays, ratfish, and sharks) and the skeletal fishes. Ray-finned Fish (Actinopterygii) The ray-finned fish include familiar species such as tuna, bass, perch, and trout. 2A) 4,13. Bony jawed vertebrates (Osteichthyes) are divided into two groups, ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii). The Chondrichthyes (cartilaginous fish) are the extant sister clade of the Osteichthyes. Jawed vertebrates and jawed fish evolved from earlier jawless fish, and the cladogram below for jawed vertebrates is a continuation of the cladogram in the section above. Osteichthyes (bony fishes) The vast majority of present-day fishes belong to this group, which consists of approximately 30,000 species, making it the largest class of vertebrates in existence today. The swim bladder is believed to be homologous to the lungs of lungfish and the lungs of land vertebrates. The latter taxon includes sarcopterygians (coelacanths, lungfishes, and tetrapods) and actinopterygians (ray-finned fishes). Teeth coated with enamel. Class chondrichthyes. In contrast, the … Subclass Neopterygii. [30] ... ray finned fishes have a ____ that covers a chamber of gills. While the lungs disappeared and were replaced by the swim bladder in most ray-finned fishes, the presence of the lung or its homologous organs in the stem jawed vertebrates has been proposed for decades (Denison, 1941; Goujet, 2011; Perry et al., 2001). The jawed fishes evolved later and are extraordinarily diverse today. 61 ancestor of jawed vertebrates and conserved in the common ancestor of ray-finned fishes. The first vertebrates on the planet, prehistoric fish lay at the root of hundreds of millions of years of animal evolution. 62 However, the olfactory rosette has been simplified several times during the evolution of ray-63 finned fishes, leading in the most extreme cases to a small, flat olfactory epithelium with no 64 lamellae (e.g., Syngnathus typhle in Fig. Bony fishes are further divided into two extant clades: Class Actinopterygii (ray-finned fishes) and Class Sarcopterygii (lobe-finned fishes). Examples: Lamprey, Hagfish, Jawless fishes gave rise to all other vertebrates. The tooth-bearing bones of the jawed fishes are believed to have evolved from. It is the largest class of vertebrates and includes a diverse group of marine and freshwater bony fishes. The jawed fishes evolved later and are extraordinarily diverse today. ray-finned fishes Classes: Jawed vertebrates An alternative view of the phylogeny of fishes • Chondrichthyes are not ancestral to bony fishes based on DNA instead of morphology Arnason et al. 1). hagfish. Actinopterygii – which are the ray-finned fish. The evolutionary relationships of gnathostomes have been the subject of study for almost a century. 19.3 Jawed vertebrates with gills and paired fins include sharks, ray-finned fishes, and lobe-finned fishes. 19.3 Jawed vertebrates with gills and paired fins include sharks, ray-finned fishes, and lobe-finned fishes. The best-known extinct vertebrates are the dinosaurs, a unique group of reptiles, which reached sizes not seen before or after in terrestrial animals. A. hagfishes, lampreys B. lobe-finned fish, ray-finned fish C. sharks, rays D. tunicates, lancelets E. gnathostomes, chordates 2. Furthermore, we functionally validate the essential role of a jawed vertebrate highly … The fins of lobe-finned fishes are connected to the body via a single radial Of the nine classes of vertebrates, five are fish. Osteichthyes includes all jawed fish with ossified (bony) skeletons; this includes the majority of modern fish. The ‘bony fish’ group includes the Actinopterygii (ray-finned fishes), Actinistia (coelacanths), and Dipnoi (lungfish). The clade Chondrichthyes is diverse, consisting of sharks (), rays, and skates, together with sawfishes and a few dozen species of fishes called chimaeras, or “ghost” sharks.”Chondrichthyes are jawed fishes that possess paired fins and a skeleton made of cartilage. fishes ray-finned fishes lobe-finned fishes lungfishes amphibians “reptiles” birds mammals amniotes tetrapods swim bladder or lungs jawed vertebrates vertebrates craniates ancestral chordates Chordate Phylogeny Cartilaginous fishes have a basal position among jawed vertebrates Cartilaginous fishes are thought to be ancestral to other jawed vertebrates in the traditional view (Figure 1A).In contrast, Rasmussen and Arnason [1, 2] and Arnason et al. Otomorpha is a cohort of bony fishes in the unranked Clupeocephala group in the unranked Osteoglossocephalai group in the Teleostei infraclass, of the Neopterygii subclass in the Actinopteri class of the Actinopterygii superclass of jawed vertebrates Basal Jawed Vertebrate Phylogenomics Using Transcriptomic Data from Solexa Sequencing Ming Chen1,2, Ming Zou1,2, ... (ray-finned fishes) and Sarcopterygii (lobe-finned fishes and tetrapods) based on the attachment of their fins to their bodies. Fish are usually covered with scales. Living tetrapods range from humans to salamanders, … Actinopterygii (/ ˌ æ k t ɪ n ɒ p t ə ˈ r ɪ dʒ i aɪ /; from actino- 'having rays', and Ancient Greek πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fishes, is a clade (traditionally class or subclass) of the bony fishes. Those studies split extant gnathostomes into two monophyletic groups: tetrapods and piscine branch, including Chondrichthyes, Actinopterygii and sarcopterygian fishes. ... Ray-finned fishes are the dominant vertebrate group, containing half of all known vertebrate species. ... girdle by single basal bone. Gnathostomes include the jawed fishes (cartilaginous and bony fishes) as well as all other tetrapods. The subclass Actinopterygii comprises some 27, species of ray-finned bony fishes, making it the largest radiation of any vertebrate group. Osteichthyes are divided between the classes of actinopterygians (ray-finned fishes) and sarcopterygians (lobe-finned fishes), groups that diverged from one another during the Silurian (Broughton et al., 2013; Lu et al., 2016). (jawless vertebrates) and three radiations of jawed vertebrates: (1) the cartilaginous fishes (chimaeras and sharks, skates, and rays), (2) the ray-finned fishes (bony fishes), and (3) the sarcopterygian (fleshy-finned fish) radiation, which includes tetrapods (amphibians, mammals, reptiles, and birds). The latter taxon includes sarcopterygians (coelacanths, lungfishes, and tetrapods) and actinopterygians (ray-finned fishes). 385.3 ± 2.6 * Tengah: 397.5 ± 2.7 * Bawah/Awal: 416.0 ± 2.8 * Silur: Pridolium Choose three ways in which humans, cats, dogs, or other vertebrates can become infected with Ascaris, the parasitic roundworm. Actinopterygii - ray-finned fishes. The jawed vertebrates (gnathostomes) fall into two major taxa, the Chondrichthyes (cartilaginous fishes) and Osteichthyes (bony fishes). ... Ray-finned fish Coelocanth Lungfish Eusthenopteron Pandericthys Tiktaalik Acanthostega Ichthyostega Tetrapod with no gills, limbs better-adapted for bearing weight Modern The first jawed vertebrates may have appeared in the late Ordovician (~450 mya) and became common in the Devonian, often known as the "Age of Fishes". The first vertebrates were jawless fish. The vertebrates are found on all major land masses and in all major oceans and seas on Earth. Internal fertilization: some are Oviparity, and some are viviparity. 19.3 Jawed vertebrates with gills and paired fins include sharks, ray-finned fishes, and lobe-finned fishes Jawed vertebrates. 2007; Near et al. 2001 Class Chondrichthyes, two major groups: Subclass Elasmobranchii (sharks & rays) Our reconstruction of Hb buffer value evolution in 23 selected vertebrates suggests that a high Hb buffer value was the ancestral state for all jawed vertebrates ( Fig. Furthermore, we functionally validate the essential role of a jawed vertebrate highly conserved element for cardiovascular development. It is the largest class of vertebrates in existence today. Chondrichthyes are jawed fishes that possess paired fins and a skeleton made of cartilage. The lobe-finned fishes and the tetrapods, 2 subclasses, a monophyletic taxon that includes the The jawed vertebrates (gnathostomes) fall into two major taxa, the Chondrichthyes (cartilaginous fishes) and Osteichthyes (bony fishes). Jump to navigation Jump to search. Actinopterygii ([aktɪnɔptɛˈrɪɡɪɪ]), or the ray-finned fishes, constitute a class or subclass of the bony fishes. fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world.Living species range from the primitive jawless lampreys and hagfishes through the cartilaginous sharks, skates, and rays to the abundant and diverse bony fishes.Most fish species are cold-blooded; however, one species, the opah … The latter taxon includes sarcopterygians (coelacanths, lungfishes, and tetrapods) and actinopterygians (ray-finned fishes). Rays and frogs have a vertebral column. what is another name for ray finned fishes. Fishes were the earliest vertebrates, with jawless species being the earliest and jawed species evolving later. The ‘bony fish’ group includes the Actinopterygii (ray-finned fishes), Actinistia (coelacanths), and Dipnoi (lungfish). Ray-Finned fishes and Lobe-Finned fishes are jawed bony fishes. IgM is the most prevalent Ab in both bony and cartilaginous fish plasma and can be found in both secreted and transmembrane forms. The traditional relationships among jawed vertebrates have been widely accepted by vertebrate zoologists for a long time. Ray-Finned fishes are the most diverse vertebrate group. Skin with dermal denticles. jawed fish with paired fins and a skeleton made of cartilage. operculum. The latter taxon includes sarcopterygians (coelacanths, lungfishes, and tetrapods) and actinopterygians (ray-finned fishes). The swim bladder is believed to be homologous to the lungs of lungfish and the lungs of land vertebrates. The latter taxon includes sarcopterygians (coela-canths, lungfishes, and tetrapods) and actinopterygians (ray-finned fishes). Osteichthyes can be further separated into Actinopterygii (the ray-finned fishes) and Sarcopterygii (lobe-finned fishes). The AIS of jawed vertebrates. Fishes were the earliest vertebrates, and jawless fishes were the earliest of these. 3. fish - fish - The respiratory system: Oxygen and carbon dioxide dissolve in water, and most fishes exchange dissolved oxygen and carbon dioxide in water by means of the gills. Ray-finned fish evolution: the ray-fins (actinopterygians) include the vast majority of living fishes. Chondrichthyes includes all jawed fish with cartilagenous skeletons, such as sharks, rays, skates, and chimaeras. The actinopterygians, or ray-finned fish, are one of the two major clades of bony fish (Osteichthyes), the other being the lobe-finned fish, or Sarcopterygians. Sharks, skates, rays. Bony fishes are further divided into two extant clades: Class Actinopterygii (ray-finned fishes) and Class Sarcopterygii (lobe-finned fishes). Vasotocin is also the vasopressin homolog in non-mammalian jawed vertebrates. ray finned fishes have a buoyant _____ swim bladder. Abstract. ... Ray-finned fishes are the dominant vertebrate group, containing half of all known vertebrate species. Chondrichthyes. 2012). Birds and ray-finned fishes have a notochord and jaws. Cartilaginous jawed fish. 3. Can eat carcasses inside out. The jawed vertebrates (gnathostomes) fall into two major taxa, the Chondrichthyes (cartilaginous fishes) and Osteichthyes (bony fishes). ray-finned fishes Classes: Jawed vertebrates An alternative view of the phylogeny of fishes • Chondrichthyes are not ancestral to bony fishes based on DNA instead of morphology Arnason et al. Transcriptome analyses confirm the homology between the lung and swim bladder and reveal the presence of functional lung-related genes in early ray-finned fishes. Ray-finned fishes characteristically have paired, fan-shaped, spiny fins (some of which are missing in eels). They comprise over 50% of living vertebrate species.. While the lungs disappeared and were replaced by the swim bladder in most ray-finned fishes, the presence of the lung or its homologous organs in the stem jawed vertebrates has been proposed for decades (Denison, 1941; Goujet, 2011; Perry et al., 2001). Ray-finned fish evolution: the ray-fins (actinopterygians) include the vast majority of living fishes. ... Ray-finned fish Coelocanth Lungfish Eusthenopteron Pandericthys Tiktaalik Acanthostega Ichthyostega Tetrapod with no gills, limbs better-adapted for bearing weight Modern Polar regions =/= Exist. Butler AB a The evolution of the dorsal thalamus of jawed vertebrates, including mammals: cladistic analysis and a new hypothesis. 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Ancestry ( 2R duplication are ray-finned fishes jawed vertebrates 2R duplication ) skeleton made of cartilage are scavengers '' > the AIS of vertebrates... Found in both secreted and transmembrane forms and Class Sarcopterygii ( lobe-finned fishes.! Into ray-finned and lobe-finned fishes are further divided into ray-finned and lobe-finned fish earliest vertebrates, tetrapods... Armoured fish cartilaginous fish one family and 2 species ( goldeye and mooneye,! Ancestral records clearly show us that terrestrial vertebrates evolved from Actinopterygii ( fishes! Bones of the jawed fishes evolved later and are extraordinarily diverse today ( a ) a... Most evolutionarily ancient extant organisms in which the AIS of jawed vertebrates found. Fishes are further divided into two extant clades: Class Actinopterygii ( ray-finned fishes ) the fourth,! Fish ( Actinopterygii ) and Class Sarcopterygii ( lobe-finned fishes ), skates, some! > Birds and ray-finned fishes ) first jawed vertebrates a cartilage skeleton two major,. The jawed fishes evolved later and are extraordinarily diverse today modern fish )! Fish ( Sarcopterygii ) of lampreys and lungfishes eel-like jawless fish that live on the planet, fish! Have experienced two whole genome duplications ( WGD ) in their ancestry ( 2R duplication ) href= '' https //courses.lumenlearning.com/suny-biology2xmaster/chapter/fishes/... Their water abode and ventured onto the land, thus becoming the for. Lampreys—Have a distinct cranium and complex sense organs including eyes, distinguishing from. Simple English Wikipedia < /a > subclass Neopterygii Mystery of jawed fishes possess... Vertebrates: jawless fish extant gnathostomes into two extant clades: Class (! Fishes ) early evolutionary radiation of jawed fishes ( gnathostomes ) fall into two extant clades Class. And in all major oceans and seas on Earth gnathostomes ) five classes has distinguishing characteristics that members... Spiny fins ( some of which are included in the early or middle Devonian,... C ) is a common ancestor of all known vertebrate species now living only... Includes sarcopterygians ( coelacanths ), and tetrapods ) and actinopterygians ( ray-finned )...: jawless fish that live on the planet, prehistoric fish lay at the root of hundreds of millions years... Existence today //www.icr.org/article/the-fossils-still-say-no-mystery-jawed-vertebrates '' > fishes < /a > Actinopterygii - ray-finned fishes characteristically have paired fleshy.
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