• Thumbnail for Agnatha
    Agnatha (/ˈæɡnəθə, æɡˈneɪθə/; from Ancient Greek ἀ- (a-) 'without', and γνάθος (gnáthos) 'jaws') is an infraphylum of jawless fish in the phylum Chordata...
    41 KB (2,703 words) - 16:50, 25 April 2024
  • Thumbnail for Ichthyology
    (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 33,400 species of fish had been described as of...
    15 KB (1,280 words) - 03:06, 15 January 2024
  • Thumbnail for Vertebrate
    Vertebrates comprise groups such as the following infraphyla and classes: Agnatha or jawless fish, which include: †Conodonta †Ostracodermi Cyclostomi (hagfish...
    77 KB (7,023 words) - 02:52, 10 April 2024
  • Thumbnail for Craniate
    cartilaginous fishes or primitive vertebrates. Cope (1889) coined the name Agnatha ("jawless") for a group that included the cyclostomes and a number of fossil...
    17 KB (1,576 words) - 17:42, 17 April 2024
  • Thumbnail for Metaspriggina
    with Metaspriggina and the other craniates (both gnathostomatans and Agnatha) grouped with Branchiostoma and the cephalochordates, and Pikaia out on...
    10 KB (956 words) - 02:07, 8 September 2023
  • taxonomy. Traditional classification divides fish into three extant classes (Agnatha, Chondrichthyes, and Osteichthyes), and with extinct forms sometimes classified...
    4 KB (526 words) - 12:20, 7 February 2024
  • classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Infraphylum: Agnatha Genus: †Areyongalepis Young, 2000 Species: †A. oervigi Binomial name †Areyongalepis...
    2 KB (144 words) - 09:20, 16 November 2022
  • Thumbnail for Lists of organisms by population
    This is a collection of lists of organisms by their population. While most of the numbers are estimates, they have been made by the experts in their fields...
    22 KB (1,741 words) - 04:50, 12 April 2024
  • Thumbnail for Subphylum
    Examples of infraphyla include the Mycetozoa, the Gnathostomata and the Agnatha. Hutchinson 1973. Hutchinson, John (1973). The families of flowering plants...
    2 KB (174 words) - 10:47, 15 September 2023
  • Thumbnail for List of largest fish
    Fish vary greatly in size. The whale shark and basking shark exceed all other fish by a considerable margin in weight and length. Fish are a paraphyletic...
    75 KB (8,256 words) - 12:48, 28 April 2024
  • The following is a list of the classes in each phylum of the kingdom Animalia. There are 107 classes of animals in 33 phyla in this list. However, different...
    8 KB (503 words) - 09:28, 29 April 2024
  • Thumbnail for Chordate
    (Craniata) (vertebrates – animals with backbones; 66,100+ species) Superclass 'Agnatha' paraphyletic (jawless vertebrates; 100+ species) Class Cyclostomata Infraclass...
    51 KB (4,719 words) - 06:08, 14 April 2024
  • Thumbnail for List of chordate orders
    This article contains a list of all of the classes and orders that are located in the Phylum Chordata. Order Amphioxiformes Genus Pikaia † Order Enterogona...
    14 KB (945 words) - 16:45, 25 April 2024
  • Thumbnail for Fish fin
    supported by bones; in cartilaginous fish (Chondrichthyes) and jawless fish (Agnatha), fins are fleshy "flippers" supported by a cartilaginous skeleton. Fins...
    89 KB (7,622 words) - 11:43, 18 April 2024
  • Thumbnail for Outline of biology
    myriapoda – arachnids – insects – annelids – molluscs Vertebrates: fishes: – agnatha – chondrichthyes – osteichthyes Tiktaalik tetrapods amphibians reptiles...
    34 KB (2,985 words) - 00:52, 4 March 2024
  • Thumbnail for List of fish of the North Sea
    systematic index. It includes 40 species of Chondrichthyes, three species of Agnatha, the other are bony fishes. The following tags are used to indicate the...
    60 KB (177 words) - 13:40, 13 March 2023
  • Thumbnail for Evolution of fish
    first craniates and vertebrates. The first fish lineages belong to the Agnatha, or jawless fish. Early examples include Haikouichthys. During the late...
    46 KB (4,511 words) - 16:55, 25 April 2024
  • Thumbnail for Thelodus
    Märss, Tiiu, Mark VH Wilson, and Raymond Thorsteinsson. "New thelodont (Agnatha) and possible chondrichthyan (Gnathostomata) taxa established in the Silurian...
    3 KB (212 words) - 04:40, 6 January 2024
  • Thumbnail for Ostracoderm
    million years. The Subclass Ostracodermi has been placed in the division Agnatha along with the extant Subclass Cyclostomata, which includes lampreys and...
    16 KB (1,032 words) - 00:26, 25 April 2024
  • Thumbnail for Metamorphosis
    chordates. Some fish, both bony fish (Osteichthyes) and jawless fish (Agnatha), undergo metamorphosis. Fish metamorphosis is typically under strong control...
    23 KB (2,666 words) - 12:23, 9 April 2024
  • Thumbnail for Haikouichthys
    classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Infraphylum: Agnatha Order: †Myllokunmingiida Family: †Myllokunmingiidae Genus: †Haikouichthys...
    6 KB (559 words) - 21:37, 10 March 2024
  • Obruchev, D.V. and Mark-Kurik, E.Yu., Psammosteidy (Agnatha, Psammosteidae) devona SSSR (Psammosteids (Agnatha, Psammosteidae) from the Devonian of the USSR)...
    5 KB (454 words) - 02:10, 6 January 2024
  • Tunicata (e.g., Ciona) Subphylum 4. Vertebrata (= Craniata) Superclass 1. Agnatha Class 1. Cyclostomata Class 2. †Cephalaspidomorphi (e.g., †Cephalaspis)...
    19 KB (1,579 words) - 06:49, 23 December 2023
  • Thumbnail for Kingdom (biology)
    Conodonta †           Subphylum Vertebrata             Infraphylum Agnatha             Infraphylum Gnathostomata   Subkingdom Mesozoa     Phylum Mesozoa...
    75 KB (4,869 words) - 14:08, 31 March 2024
  • Thumbnail for Fish
    classifications. Traditional classification divides fish into three extant classes (Agnatha, Chondrichthyes, and Osteichthyes), and with extinct forms sometimes classified...
    101 KB (10,032 words) - 03:01, 24 April 2024
  • Thumbnail for Jaw
    Gnathostomes), which have seven arches, and primitive jawless vertebrates (the Agnatha), which have nine. The original selective advantage offered by the jaw...
    8 KB (847 words) - 08:01, 20 April 2024
  • Thumbnail for Occipital bone
    endocranium, the most basal portion of the skull. In Chondrichthyes and Agnatha, the occipital does not form as a separate element, but remains part of...
    14 KB (1,788 words) - 13:59, 11 April 2024
  • Thumbnail for Petromyzontidae
    classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Infraphylum: Agnatha Class: Hyperoartia Order: Petromyzontiformes Family: Petromyzontidae A...
    2 KB (98 words) - 00:46, 17 November 2023
  • Thumbnail for Neoptera
    following classification: Pterygota division Palaeoptera order Odonata order Agnatha (correct name: Ephemeroptera) †order Dictyoneuridea †order Megasecoptera...
    10 KB (473 words) - 22:35, 22 February 2024
  • Thumbnail for Myllokunmingiidae
    classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Infraphylum: Agnatha Order: †Myllokunmingiida Shu, 2003 Family: †Myllokunmingiidae Shu, 2003...
    3 KB (270 words) - 15:45, 23 December 2022