A chordate is an animal of the phylum Chordata (/kɔːrˈdeɪtə/). All chordates possess, at some point during their larval or adult stages, five synapomorphies, or primary physical characteristics, that distinguish them from all the other taxa. These five synapomorphies include a notochord, dorsal hollow … See more Chordates form a phylum of animals that are defined by having at some stage in their lives all of the following anatomical features: • A notochord, a stiff rod of cartilage that extends along the … See more Overview There is still much ongoing differential (DNA sequence based) comparison research that is … See more The closest relatives of the Chordates are the Hemichordates and Echinodermata, which together form the Ambulacraria. The Chordata and Ambulacraria together form the superphylum Deuterostomia. Hemichordates Hemichordates ("half … See more The following schema is from the 2015 edition of Vertebrate Palaeontology. The invertebrate chordate classes are from Fishes of the World. While it is structured so as to reflect … See more Cephalochordata: Lancelets Cephalochordates, one of the three subdivisions of chordates, are small, "vaguely fish-shaped" animals that lack brains, clearly defined heads and specialized sense organs. These burrowing filter … See more Although the name Chordata is attributed to William Bateson (1885), it was already in prevalent use by 1880. Ernst Haeckel described a taxon … See more • Chordate genomics • List of chordate orders – All the classes and orders of phylum Chordata See more WebConodonts ( Greek kōnos, "cone", + odont, "tooth") are an extinct group of agnathan (jawless) vertebrates resembling eels, classified in the class Conodonta. For many years, they were known only from their tooth-like oral elements, which are usually found in isolation and are now called conodont elements. Knowledge about soft tissues remains ...
Chordate phylogeny and the meaning of categorial ranks in …
WebEvolution and paleontology. Many scientists maintain that chordates originated sometime earlier than 590 million years ago; that is, they predate the fossil record.Such early … WebChordates and the Evolution of Vertebrates. Chordata also contains two clades of invertebrates: Urochordata and Cephalochordata. Members of these groups also possess the four distinctive features of chordates at some point during their development. Urochordata. Members of Urochordata are also known as tunicates (Figure 3). The name … crust miami pizza
Hox genes and chordate evolution - PubMed
Webthe evolution of chordates has been treated contemptuously. The present review calls for a more considerate treatment of the morphological evidence at hand. 118 Journal of Zoology 276 (2008) 117–141 c 2008 The Author. Journal compilation c 2008 The Zoological Society of London Chordate phylogeny and evolution T. Stach WebHalecomorphi is a taxon of ray-finned bony fish in the clade Neopterygii.The only extant Halecomorph species are the bowfin (Amia calva) and eyespot bowfin (Amia ocellicauda), but the group contains many extinct species in several families (including Amiidae, Caturidae, Liodesmidae, Sinamiidae) in the order Amiiformes, as well as the extinct … WebDissorophoidea is a clade of medium-sized, temnospondyl amphibians that appeared during the Moscovian in Euramerica, and continued through to the Late Permian and the Early Triassic of Gondwana.They are distinguished by various details of the skull, and many species seem to have been well adapted for life on land. Dissorophoid diversity was … mara pavanelly 2023 sua musica