The Rise of Animal Diversity

Kingdom Animalia

• 1.3 million described species with 35 phyla in Kingdom Animalia

• Animals fall under the categories of Metazoas

• Animals are:

  • Eukaryotic

  • Multicellular

  • Motile

  • Heterotrophs

  • Cell wall-less

• Animals showed up during the Cambrian Explosion

Animal Phylogeny

• AAA

  

• Choanoflagellates are the closest living relatives to animals

  

• Invertebrates can be classified off:

  

  • Tissue types

    • True tissues

    • No true tissues

      • Sponges…

  • Symmetry or non-symmetrical

    • Radial symmetry

    • Bilateral symmetry

  • Protostomes or deuterostomes

    • Protostomes

      • Acoelomates

      • Coelomates

        • Worms

        • Segmented Worms

    • Deuterostomes

• Veterebrets