Animal Phyla

Application:

•  Recognition features of porifera, cnidaria, platyhelmintha, annelida, mollusca, arthropoda and chordata

Chinese Pattern brown Litchi Crossbody Girls Messenger Handbag Howoo Women Embroidered Bag Shoulder Style pink Bag for PU XxwZgAqn5

    
The kingdom Animalia can be sub-divided into two main groups – invertebrates (no backbone) and vertebrates (most chordata)

  • Examples of invertebrate phyla include porifera, cnidaria, platyhelmintha, annelida, mollusca and arthropoda
  • All vertebrates belong to the phylum chordata – however not all chordata are vertebrates (e.g. invertebrate sea squirts)
  • These phyla can be differentiated according to a few key recognition features


Porifera

  • No body symmetry (asymmetrical)
  • No mouth or anus (have pores to facilitate the circulation of material)
  • May have silica or calcium carbonate based spicules for structural support
  • Examples include sea sponges


Cnidaria

  • Have radial symmetry
  • Have a mouth but no anus (single entrance body cavity)
  • May have tentacles with stinging cells for capturing and disabling prey
  • Examples include jellyfish, sea anemones and coral


Platyhelmintha

  • Have bilateral symmetry
  • Have a mouth but no anus (single entrance body cavity)
  • Have a flattened body shape to increase SA:Vol ratio and may be parasitic
  • Examples include tapeworms and planaria


Annelida

  • Have bilateral symmetry
  • Have a separate mouth and anus
  • Body composed of ringed segments with specialisation of segments
  • Examples include earthworms and leeches


Maike Liebeskind Women's Bag Cross Vintage Brown Cognac 0006 Berlin body Mollusca

  • Have bilaterial symmetry
  • Have a separate mouth and anus
  • Body composed of a visceral mass, a muscular foot and a mantle (may produce shell)
  • Examples include snails, slugs, octopi, squid and bivalves (e.g. clams)


Arthropoda

  • Have bilateral symmetry
  • Have a separate mouth and anus
  • Have jointed body sections / appendages and have a hard exoskeleton (chitin)
  • Examples include insects, crustaceans, spiders, scorpions and centipedes


body Women's Brown Liebeskind Vintage Maike Berlin Cognac 0006 Bag Cross

Chordata

  • Have bilateral symmetry
  • Have a separate mouth and anus
  • Have a notochord and a hollow, dorsal nerve tube for at least some period of their life cycle
  • Examples include mammals, birds, reptiles, amphibians and fish (also invertebrate sea squirts)


Invertebrate Phyla Recognition Features:


Overview of Invertebrate Phyla


Maike Cognac Women's Brown body Liebeskind Berlin Vintage 0006 Bag Cross
0006 Cross Vintage body Maike Brown Bag Berlin Women's Cognac Liebeskind PIq7E6wzWn 0006 Cross Vintage body Maike Brown Bag Berlin Women's Cognac Liebeskind PIq7E6wzWn 0006 Cross Vintage body Maike Brown Bag Berlin Women's Cognac Liebeskind PIq7E6wzWn 0006 Cross Vintage body Maike Brown Bag Berlin Women's Cognac Liebeskind PIq7E6wzWn 0006 Cross Vintage body Maike Brown Bag Berlin Women's Cognac Liebeskind PIq7E6wzWn 0006 Cross Vintage body Maike Brown Bag Berlin Women's Cognac Liebeskind PIq7E6wzWn