1. In the palaeozoic age, the Chordates were originated from some sessile Echinoderms, which were bottom dwellers of the sea.The primitive Chordates resemble the non-Chordates

2. Characteristic Features of Chordates

3. Ascidians (tunicates) are primitive chordates

4. The major point to differentiate between Chordates and non-Chordates is that Chordates have a spinal cord or backbone in their body structure whereas non-Chordates are without backbone or notochord in their body structure

5. In addition, Chordates have several unique structures.

6. Chordata definition, the phylum comprising the chordates

7. Jellyfish gave rise to the first chordates.

8. Chordates other than Craniates include entirely aquatic forms

9. Start studying Characteristics of Chordates, Craniates, and Gnathostomes

10. Chordates and Non-Chordates are primarily differentiated by the presence or absence of an important structure called the notochord at some point in their lifecycle

11. Some classifications also include the phylum HemiChordata with the chordates.

12. Overview of the characteristics and classification of Chordates

13. The first chordates gave rise to the first vertebrates.

14. Chordates are characterized by the presence of a notochord

15. The main difference between Chordates and vertebrates is that some Chordates do not have a vertebral column whereas all vertebrates have a vertebral column

16. Phylum Chordata: All chordates are deuterostomes, possessing a notochord

17. What's a chordate? Most Chordates are animals with backbones

18. Some classifications also include the phylum Hemichordata with the Chordates.

19. Axiate Organization: All the chordates have a distinct polar axis

20. Chordates are known to have spinal chords be their main attraction

21. Conodonts are extinct chordates resembling eels, classified in the class Conodonta

22. Conodonts are extinct chordates resembling eels, classified in the class Conodonta

23. Class: Agnatha "Without Jaws" Most primitive chordates (with heads)

24. •Chordates that use gills for respiration have a single-loop circulatory system

25. Four distinctive derived characteristics of Chordates distinguish them from their ancestors: A

26. Ascidians are sessile invertebrate chordates possessing numerous biochemical as well as pharmacological activities

27. The Chordates are named for the notochord: a flexible, rod-shaped structure that is found in the embryonic stage of all Chordates and also in the adult stage of some chordate species

28. The Chordates are named for the notochord, which is a flexible, rod-shaped structure that is found in the embryonic stage of all Chordates and in the adult stage of some chordate species

29. They were called the chordates, and started a momentous chain of evolutionary events.

30. The Chordates were originated from a fish-like ancestor, very similar to the larva of the Ascidia (Tunicata) and it is assumed that they became the ancestor of the Chordates by retaining the larval form throughout the life

31. The Chordates are named for the notochord, which is a flexible, rod-shaped structure that is found in the embryonic stage of all Chordates and in the adult stage of some chordate species

32. The Chordates are named for the notochord, which is a flexible, rod-shaped structure that is found in the embryonic stage of all Chordates and in the adult stage of some chordate species

33. The Chordates are named for the notochord, which is a flexible, rod-shaped structure that is found in the embryonic stage of all Chordates and in the adult stage of some chordate species

34. The Chordates are named for the notochord, which is a flexible, rod-shaped mesodermal structure that is found in the embryonic stage of all Chordates and in the adult stage of some chordate species

35. The remaining chordates are the tunicates (UroChordata), lancelets (CephaloChordata), and, possibly, some odd extinct groups.

36. Amphioxus: ( am'fē-ok'sŭs ), A genus of small, translucent, fishlike chordates found in warm marine waters

37. The Amphioxus, or lancelet, represents one of the most primitive of all animals known as chordates

38. Most Chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.

39. Chordates A chordate is an animal that belongs to the phylum Chordata, which becomes part of the Deuterostomes kingdom

40. The lancelets, or Cephalochordata, are a group of primitive chordates which were formerly called Amphioxus.It includes Pikaia.

41. Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates

42. The Chordates are named for the notochord, which is a flexible, rod-shaped mesodermal structure that is found in the embryonic stage of all Chordates and in the adult stage of some chordate species. It is strengthened with glycoproteins similar to cartilage and covered with a collagenous sheath.

43. Agnatha - superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms superclass Agnatha Craniata,

44. Conodonts (Greek kōnos, " cone ", + odont, "tooth") are extinct chordates resembling eels, classified in the class Conodonta

45. Many scientists maintain that Chordates originated sometime earlier than 590 million years ago; that is, they predate the fossil record

46. According to a long-standing theory, the origin of Chordates may be found in transformed larvae of sea-squirts

47. The Chordates The animals most familiar to most people belong to the phylum Chordata (kor-da´ta) (L

48. Both Chordates and vertebrates contain a nerve cord, pharyngeal gill slits, and post-anal tail at some points of their life

49. Chordates make up a phylum in the animal kingdom that includes all the vertebrates, along with some primitive wormlike sea animals

50. The phylum Chordata contains two groups of invertebrate chordates, but the most conspicuous and familiar members of Chordata are the vertebrates

51. In Chordates, there is a muscular tail which exists behind the anus through which the digestive tract does not pass

52. The Ascidian tadpole larva represents the basic body plan of all chordates in a relatively small number of cells and tissue types

53. Amphioxus lanceolatusand for the first time described their notochord (see Glossary, Box 1), the defining morphological trait of chordates (Yarrell, 1836)

54. All its members, called Chordates, have bilateral symmetry, as well as a head, a body cavity, a digestive system, and body segmentation

55. The Chordates are named for the notochord: a flexible, rod-shaped structure that is found in the embryonic stage of all Chordates and also in the adult stage of some chordate species. It is located between the digestive tube and the nerve cord, providing skeletal support through the length of the body.

56. Conodont — noun a) Any of several extinct fishlike chordates that had conelike teeth b) A microfossil tooth of such an animal … Wiktionary

57. Chordates share four derived characters: a notochord; pharyngeal clefts or slits; a dorsal, hollow nerve cord; and a muscular, post-anal tail

58. Chorda, cord).Humans are members and share with other Chordates the characteristic from which the phylum derives its name—the notochord (Gr

59. Craniates (Craniata) are a group of chordates that includes hagfish, lampreys, and jawed vertebrates such as amphibians, birds, reptiles, mammals, and fishes

60. Craniates are best described as chordates that have a braincase (also called a cranium or a skull), mandible (jawbone) and other facial bones.

61. Any of various small marine chordates of the group Conodonta of the Paleozoic Era and the Triassic Period, preserved primarily in the form of their conelike teeth

62. Chordates consist of three groups of unequal size: cephaloChordates (amphioxi or lancets), uroChordates (tunicates or “sea squirts”), and the largest group, the vertebrates (fishes, amphibians

63. The Chordata is the animal phylum with which everyone is most intimately familiar, since it includes humans and other vertebrates. However, not all Chordates are vertebrates

64. Agnatha: 1 n superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms Synonyms: superclass Agnatha Type of: class (biology) a …

65. Any of various small marine chordates of the group Conodonta of the Paleozoic Era and the Triassic Period, preserved primarily in the form of their conelike teeth

66. Conodonts occur in sediments from the CAMBRIAN to the TRIASSIC and are thought to be associated with the mouth-parts of primitive chordates such as members of the AGNATHA.

67. Conodonts are extinct chordates resembling eels, classified in the class Conodonta. For many years, they were known only from tooth-like microfossils now called Conodont elements, found in isolation

68. Kō'nə-dŏnt', kŏn'ə- Any of various small marine chordates of the group Conodonta of the Paleozoic Era and the Triassic Period, preserved primarily in the form of their conelike teeth.

69. All Chordates have the following features at some point in their life (in the case of humans and many other vertebrates, these features may only be present in the embryo):

70. But Chordates do have many amazing species.The white tiger (Panthera tigris) is a chordate.The tiger is also from the class Mammalia, order Carnivora, and family Felidae, meaning it is a meat-eating cat.

71. Conodonts occur in sediments from the CAMBRIAN to the TRIASSIC and are thought to be associated with the mouth-parts of primitive chordates such as members of the AGNATHA

72. Chordates are neither the most diverse nor the largest of the animal phyla, although in terms of the number of species, they come in a respectable fourth behind arthropods, nematodes, and molluscs

73. Chordates, members o the phylum Chordata, are deuterostome ainimals possessin a notochord, a hollae dorsal nerve cord, pharyngeal slits, an endostyle, an a post-anal tail for at least some period o thair life cycles

74. Chordata Taxonomic Serial No.: 158852 (Download Help) Chordata TSN 158852 Taxonomy and Nomenclature Kingdom: Animalia : Taxonomic Rank: Phylum : Synonym(s): Common Name(s): cordés [French] cordado [Portuguese] chordates [English] Taxonomic Status: Current Standing: valid

75. Chordates (Chordata) are a group of animals that includes vertebrates, tunicates, lancelets. Of these, the vertebrates—lampreys, mammals, birds, amphibians, reptiles, and fishes—are the most familiar and are the group to which humans belong.

76. Protostomes o Divided into two clades; o Lophotrochozoans; grow by gradual addition of mass t the body and undergo spiral cleavage o Ecdysozoans; animals that molt, a phenomenon that seems to have evolved only once in the animal kingdom o Animals that’s undergo embryonic development where the embryonic Blastophore develops to become the animal’s mouth Deuterostomes o Include chordates …

77. Backbone: 1 n the series of vertebrae forming the axis of the skeleton and protecting the spinal cord Synonyms: back , rachis , spinal column , spine , vertebral column Types: notochord a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates

78. -Most numerous and complex Chordates-Spinal column made up of vertebrae, surrounds or replaces notochord in adult (endoskeleton)-Anterior part of nerve cord is the brain (protected by skull)-Large head-Neck, trunk-A tail is present at some stage in development-Jointed, internal skeleton-To pairs of appendages-Red blood cells contain hemoglobin