they belong to phylum Arthropoda and nearly found in every habitat of the biosphere. The most well-known echinoderms are members of class Asteroidea, or sea stars. All the animals in Phylum Echinodermata exhibit spiny skin and hence are grouped together. Echinodermata have a world-wide distribution and the phylum contains some 5,300 known species and a large number of fossil forms. Examples of animals in the phylum Mollusca. The examples of class Asteroidea is star fish, Ophiuroidea is brittle - star, Echinoidea is sea - urchin and Holothurion is sea- cucumber.. Examples: Echinus (Sea … Respiratory organs in Echinodermata are dermal branchiae, genital bursae, peristomial gills, cloacal trees and tube feet. The most well-known echinoderms are members of class Asteroidea, or sea stars. Classification of Animal Kingdom - Porifera, Coelenterata, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata, Chordata.] We’ll discuss what an echinoderm is, examine what their defining features are, and go over some examples of the five classes that make up the phylum Echinodermata. Body is disc-like hemi-spherical; They are devoid of arms or free-rays. Images licensed under CC0. Start studying Five Classes of Echinoderms. Classification of Phylum Echinodermata: Phylum Echinodermata is divided into five classes. Their bodies are soft and worm like. They possesses tube feet with a sucker. If you know a starfish, then you are well aware of what an echinoderm is. In biology, a phylum (/ ˈ f aɪ l əm /; plural: phyla) is a level of classification or taxonomic rank below kingdom and above class. Source | Credits | Picture Credits: NCERT General Science Basis for Animal Kingdom Classification Classification of Animal Kingdom is based on various fundamental features like - Levels of Organisation, Symmetry, … Classification of Phylum Mollusca. Echinoderms may also reproduce asexually, as well as regenerate body parts lost in trauma. They possess compact skeleton and movable spines. ... Characteristics of Phylum Echinodermata; Phylum Nematoda Characteristics & Examples; Examples: Ophiderma, ophiothrix, Astrophyton, Amphuria, etc; Class 3 Echinoidea. Learn about echinoderms, which include starfish and sand dollars, in this lesson. aster- star, eidos- form): Body is star-like. Class 1 Pelecypoda or Bivalvia. It includes class amphibian, reptilia, aves and mammalia. The phylum is divided into two subphyla, viz., Pelmatozoa and Eleutherozoa, Pelmatozoa, has only one living class Crinoidea, while Eleutherozoa has four living classes, Holothuroidea, Echinoidea, Asteroidea, Ophiuroidea. The phylum echinoderms is divided into five extant classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), Crinoidea (sea lilies or feather stars), and Holothuroidea (sea cucumbers). Classes of Echinoderms. They possess a water vascular system with tube feet which are used for locomotion and food capturing. The common examples of this phylum are Blanoglossus and Saccoglossus. Echinoderms are animals that you must be knowing. Larval forms are Bipinnaria and Brachiolaria. Classes of Echinoderms. Class 1. spiders, insects, centipedes, millipedes are general common examples. Asteroidea (Gk. There are many kinds of mollusks but the four main classes are the class Bivalvia, the class Polyplacophora, the class Gastropoda, and the class Cephalopoda. Examples: Class 5 Amphineura. The name actually means spiny skin! There are six classes of which three are more prominent. Phylum ECHINODERMATA. Next. This phylum is divided into five extant classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), Crinoidea (sea lilies or feather stars), and Holothuroidea (sea cucumbers) (Figure 2). Habitat: mostly marine; Body is elongated; ... Phylum Echinodermata General Characteristics and Classification. bilateral symmetry, triploblastic and jointed limbs are common Arthropoda Characteristics. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Echinoderms are triploblastic, coelomate animals with radial symmetry and spiny skin. Five arms are usually present which are not sharply marked off from the central disc. Echinoderms are animals that are invertebrates. General Characteristics of Phylum Hemichordata. ... so they are called prechordates. The phylum echinoderms is divided into five extant classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), Crinoidea (sea lilies or feather stars), and Holothuroidea (sea cucumbers). CLASSIFICATION OF ECHINODERMATA. There are four sub - phylum of Echinodermata which are Eleutherozoa and Pelmatozoa. The phylum echinoderms is divided into five extant classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), Crinoidea (sea lilies or feather stars), and Holothuroidea (sea cucumbers). Traditionally, in botany the term division has been used instead of phylum, although the International Code of Nomenclature for algae, fungi, and … Classes and Examples of Annelids There are three classes within phylum Annelida.