They are usually called Acrania group. The following points highlight the top six characteristics of amphibians. You can follow the links to a page about each phyla. (2) Notochord is only present in the embryonic stage; it is replaced by a cartilaginous or bony vertebral column in the adult forms. The characteristics are: 1. Due to great diversity in chordate forms, different schemes of classification have been proposed by a number of taxonomists from time to time. Subphylum. The notochord is a rod that extends most of the length of the body when it is fully developed. After a brief introduction I will deal with each subphylum individually. The notochord consists of a core of semi-fluid cells enclosed in a fibrous sheath. Kingdom: Animalia; Presence of a notochord; They are backboned animals (vertebrates), Most of the living chordates are familiar vertebrate animals. In some groups, some of these are present only during embryonic development. There are three subphylums in Chordata. CEPHALOCHORDATA, SUB-PHYLUM: 3. Two of them are invertebrates - Urochordata (tunicates) and Cephalachordata (lancelets), while the third is Vertebrata (vertebrates). Chordate, any member of the phylum Chordata, which includes the vertebrates (subphylum Vertebrata), the most highly evolved animals, as well as two other subphyla—the tunicates (subphylum Tunicata) and cephalochordates (subphylum Cephalochordata). Urochordata. Animals in the phylum Chordata share four key features that appear at some stage during their development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail (Figure 2). VERTEBRATA. Other characteristics shared by chordates include the following (from Hickman and Roberts, 1994): bilateral symmetry Adult. Example Phylum: Chordata You are a member of a phylum Chordata . Learn vocabulary, terms, and more with flashcards, games, and other study tools. Biology: Life on Earth, 5 th Edition Teresa and Gerald Audesirk Comparison of the Major Animal Phyla Common NameCommon Name (Phylum) Snails, Clams, SquidSnails, Clams, SquidSnails, Clams, Squid The phylum Chordata is a strange phylum in that it contains three subphyla, two of which contain invertebrates while the third contains all the animals we are most familiar with, the vertebrates. [[RUBATO]]Characteristics Of Phylum Chordata[*Notochord. The chordates form a large heterogeneous group of members differing widely from one another in many respects. Has only 1 Chordate characteristic: Pharyngeal gill bars have become a filter feeding basket. Lying dorsal to the gut but ventral to the central nervous system, it stiffens the body and acts as support during locomotion. It is a bundle of nerves running along the “back” and splits into the brain...*Pharyngeal Slits. External Features 2.Internal Features 3.Fertilization 4.Development 5.Chromosome Number 6.Physiological Adaptive Features. Presence of dorsal hollow nerve cord; Blood vascular system: Present, closed type; Ventral heart, hepatic portal system and RBC are present. Larva. PHYLUM CHORDATE-CLASSIFICATION. Has all 4 Chordate characteristics Phylum Chordate is divided into three Sub-Phyla. Characteristics of Phylum Chordata (Noton; back and chorda; cord).