Chapter 4: Animal Classification
Important features like symmetry, body organisation, coelom, segentation, germ layers, notochord
Phylum porifera - pores, canal system, spongin fibres/spicules , ostia, osculum, asyymetric, cellular level
Phylum Coelenterata- Coelenteron ( gastric cavity), cnidoblasts, nematocytes, polyp/ medusae, metagenesis, radial symmetry, tissue level
Phylum ctenophora- comb plates, bioluminiscence, radial symmetry
Phylum platyhelminthes- Dorso ventrally flattened, flame cells for excretion, acoelomate, organ /organ system level
Phylum Ascelminthes- Pseudocoelomate,
Phylum Annelida- metameric segmentation( ringed appearance), parapodia, mephredia
Phylum Arthropoda- Jointed appendages, chitinous exoskeleton, Open circulatory system, malphigian tubules,
Phylum Moolusca- Soft bodied, shell, no segmentation,Body with head, visceral hump, foot; mantle, radula,
Phylum Echinodermata- spiny skinned, endoskeleton of calcerous occicles, radial symmetry in adult, bilateral in larva, water vascular system with tubefeet.
Phylum hemichordata- body has proboscis, collar, trunk... Proboscis glandfor excretion
Phylum Chordata- Sub phylum Urochordata- notochord in larval tail
Sub phylum Cepahlochordata- notochord from head to tail throughout life
Subphylum- vertebrata- Notochord replaced by vertebral column.
Vertebrata- Division Agnatha- jawless .. Class cyclostomata- sucking circular mouth without jaw , no scales, cranium and vertebral column cartilaginous. Show Migration
Division Gnathostomata- With jaws.
Super class pisces
Class chondrichthyes- cartilagenous marine fishes
class Osteichthyes- bony freshwater fishes
Superclass tetrapoda-
Class Amphibia-
Class Reptilia,
Class aves
Class mammalia
Important fetures of chordates- notochord
dorsal hollow single nerve cord
paired pharyngeal gill slits
post anal tail
Ventral heart
Diagram of a chordate characteristics.
Differences between chordates and non chordates,
Why do we say that all chordates are vertebrates but all chordates are not vertebrates.
Characteristic features. examples
Important features like symmetry, body organisation, coelom, segentation, germ layers, notochord
Phylum porifera - pores, canal system, spongin fibres/spicules , ostia, osculum, asyymetric, cellular level
Phylum Coelenterata- Coelenteron ( gastric cavity), cnidoblasts, nematocytes, polyp/ medusae, metagenesis, radial symmetry, tissue level
Phylum ctenophora- comb plates, bioluminiscence, radial symmetry
Phylum platyhelminthes- Dorso ventrally flattened, flame cells for excretion, acoelomate, organ /organ system level
Phylum Ascelminthes- Pseudocoelomate,
Phylum Annelida- metameric segmentation( ringed appearance), parapodia, mephredia
Phylum Arthropoda- Jointed appendages, chitinous exoskeleton, Open circulatory system, malphigian tubules,
Phylum Moolusca- Soft bodied, shell, no segmentation,Body with head, visceral hump, foot; mantle, radula,
Phylum Echinodermata- spiny skinned, endoskeleton of calcerous occicles, radial symmetry in adult, bilateral in larva, water vascular system with tubefeet.
Phylum hemichordata- body has proboscis, collar, trunk... Proboscis glandfor excretion
Phylum Chordata- Sub phylum Urochordata- notochord in larval tail
Sub phylum Cepahlochordata- notochord from head to tail throughout life
Subphylum- vertebrata- Notochord replaced by vertebral column.
Vertebrata- Division Agnatha- jawless .. Class cyclostomata- sucking circular mouth without jaw , no scales, cranium and vertebral column cartilaginous. Show Migration
Division Gnathostomata- With jaws.
Super class pisces
Class chondrichthyes- cartilagenous marine fishes
class Osteichthyes- bony freshwater fishes
Superclass tetrapoda-
Class Amphibia-
Class Reptilia,
Class aves
Class mammalia
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| Euspongia( porifera) |
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| Obelia ( budding) |
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| obelia- life cycle( coelenterata) |
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| comb jellies( ctenophora) |
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| tapeworm protruding from cat anus ( platyhelminthes) |
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| parapodia and setae( Annelida) |
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| earthworm ( annelida) |
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| Mollusca |
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| Star fish (Echinoderm) |
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| Hemichordata |
Important fetures of chordates- notochord
dorsal hollow single nerve cord
paired pharyngeal gill slits
post anal tail
Ventral heart
Diagram of a chordate characteristics.
Differences between chordates and non chordates,
Why do we say that all chordates are vertebrates but all chordates are not vertebrates.
Characteristic features. examples
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