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Invertebrate Animals by Phylum. Porifera Cnidaria Platyhelminthes Nematoda Mollusca Annelida Arthropoda. What’s a PHYLUM?. Phylum: a taxonomic grouping of similar classes of organisms Translation: a “phylum” is a GROUP of organisms who have a lot in common

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invertebrate animals by phylum

Invertebrate Animals by Phylum

Porifera

Cnidaria

Platyhelminthes

Nematoda

Mollusca

Annelida

Arthropoda

what s a phylum
What’s a PHYLUM?
  • Phylum: a taxonomic grouping of similar classes of organisms
  • Translation: a “phylum” is a GROUP of organisms who have a lot in common
  • Phyla are big, huge CLADES, just below KINGDOMS in size and just above CLASSES in size
what s an invertebrate
What’s an INVERTEBRATE?
  • Definition: an animal without a

backbone.

  • None of the animals so far have had backbones, but we’re not done yet!
on to the phyla
On to the Phyla!
  • Porifera
  • Cnidaria
  • Platyhelminthes
  • Nematoda
  • Mollusca
  • Annelida
  • Arthropoda

 Already covered in detail.

  • Today’s Focus. But what do you already know?
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum porifera
Porifera Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  ArthropodaPhylum Porifera
  • The first animals: SPONGES!
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum porifera1
Porifera Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  ArthropodaPhylum Porifera
  • The first animals: SPONGES!
  • Asymmetrical body plan
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum porifera2
Porifera Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  ArthropodaPhylum Porifera
  • The first animals: SPONGES!
  • Asymmetrical body plan
  • Sessile adults, mobile “babies”
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum porifera3
Porifera Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  ArthropodaPhylum Porifera
  • The first animals: SPONGES!
  • Asymmetrical body plan
  • Sessile adults, mobile “babies”
  • Filter-feed to eat
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum porifera4
Porifera Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  ArthropodaPhylum Porifera
  • The first animals: SPONGES!
  • Asymmetrical body plan
  • Sessile adults, mobile “babies”
  • Filter-feed to eat
  • Reproduce Sexually: pump sperm into water
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum porifera5
Porifera Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  ArthropodaPhylum Porifera
  • The first animals: SPONGES!
  • Asymmetrical body plan
  • Sessile adults, mobile “babies”
  • Filter-feed to eat
  • Reproduce Sexually: pump sperm into water
  • Reproduce Asexually: by “budding”
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum porifera6
Porifera Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  ArthropodaPhylum Porifera
  • Asymmetrical body plan
  • Sessile adults, mobile “babies”
  • Filter-feed to eat
  • Reproduce Sexually: pump sperm into water
  • Reproduce Asexually: by “budding”
  • No internal organs; acoelomate
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum porifera7
Porifera Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  ArthropodaPhylum Porifera
  • Asymmetrical body plan
  • Sessile adults, mobile “babies”
  • Filter-feed to eat
  • Reproduce Sexually: pump sperm into water
  • Reproduce Asexually: by “budding”
  • No digestive tract
  • No internal organs; acoelomate
  • Key adaptations:

Have all general “animal” traits

  • Special:
    • held together by collagen, spicules for defense, complete regeneration!!!!1!
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum cnidaria
Porifera  Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  Arthropoda Phylum Cnidaria!
  • The First MOVERS: Sea Anemones & Jellyfish!
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum cnidaria1
Porifera  Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  Arthropoda Phylum Cnidaria

2 radially symmetrical body plans: POLYP and MEDUSA

porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum cnidaria2
Porifera  Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  Arthropoda Phylum Cnidaria
  • Sea Anemones & Jellyfish!
  • 2 radially symmetrical body plans: POLYP and MEDUSA
  • Usually sessile polyps, mobile medusas
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum cnidaria3
Porifera  Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  Arthropoda Phylum Cnidaria
  • Sea Anemones & Jellyfish!
  • 2 radially symmetrical body plans: POLYP and MEDUSA
  • Sessile polyps, Mobile medusas
  • Nutrition: actively capture prey
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum cnidaria4
Porifera  Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  Arthropoda Phylum Cnidaria
  • Sea Anemones & Jellyfish!
  • 2 radially symmetrical body plans: POLYP and MEDUSA
  • Sessile polyps, Mobile medusas
  • Actively capture prey
  • Adults reproduce sexually

and are dioecious

  • Moon jelly polyps reproduce

asexually by budding

porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum cnidaria5
Porifera  Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  Arthropoda Phylum Cnidaria
  • Sea Anemones & Jellyfish!
  • 2 radially symmetrical body plans: POLYP and MEDUSA
  • Sessile polyps, Mobile medusas
  • Actively capture prey
  • Reproduction:
    • mostly sexual (dioecious: 2 separate sexes)
    • Moon Jelly polyps reproduce asexually (by budding)
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum cnidaria6
PoriferaCnidariaPlatyhelminthesNematodaMolluscaAnnelidaArthropoda Phylum Cnidaria
  • 2 radially symmetrical body plans: POLYP and MEDUSA
  • Sessile polyps, Mobile medusas
  • Actively capture prey
  • Reproduction:
    • mostly sexual (dioecious: 2 separate sexes)
    • Moon Jelly polyps reproduce asexually (by budding)
  • Key adaptations:
    • Movement (nerve net, 2 sets of muscles)
    • Incomplete Digestive Tract (mouth, stomach, no anus)
    • Behavior (capture prey, fight, mate)
  • Special:
    • Liquid Skeleton, nematocysts, tentacles
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum platyhelminthes
Porifera  Cnidaria  Platyhelminthes Nematoda  Mollusca  Annelida  Arthropoda Phylum Platyhelminthes!

Planarian Flatworms

Parasitic Flatworms

Habitat: inside other animals

  • Habitat: salt and freshwater
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum platyhelminthes1
Porifera  Cnidaria  Platyhelminthes Nematoda  Mollusca  Annelida  Arthropoda Phylum Platyhelminthes

Planarian Flatworms

Parasitic Flatworms

Habitat: inside other animals

Body plan: bilateral symmetry, cephalization (has a head)

  • Habitat: salt and freshwater
  • Body plan: bilateral symmetry, cephalization (has a head)
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum platyhelminthes2
Porifera  Cnidaria  Platyhelminthes Nematoda  Mollusca  Annelida  Arthropoda Phylum Platyhelminthes

Planarian Flatworms

Parasitic Flatworms

Habitat: inside other animals

Body plan: bilateral symmetry, cephalization (has a head)

Locomotion: sessile inside host

  • Habitat: salt and freshwater
  • Body plan: bilateral symmetry, cephalization (has a head)
  • Locomotion: ripple to swim
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum platyhelminthes3
Porifera  Cnidaria  Platyhelminthes Nematoda  Mollusca  Annelida  Arthropoda Phylum Platyhelminthes

Planarian Flatworms

Parasitic Flatworms

Habitat: inside other animals

Body plan: bilateral symmetry, cephalization (has a head)

Locomotion: sessile inside host

Nutrition: steals host’s food;

  • Habitat: salt and freshwater
  • Body plan: bilateral symmetry, cephalization (has a head)
  • Locomotion: ripple to swim
  • Nutrition: hunts for food,
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum platyhelminthes4
Porifera  Cnidaria  Platyhelminthes Nematoda  Mollusca  Annelida  Arthropoda Phylum Platyhelminthes

Planarian Flatworms

Parasitic Flatworms

Habitat: inside other animals

Body plan: bilateral symmetry, cephalization (has a head)

Locomotion: sessile inside host

Nutrition: steals host’s food; head is “scolex” with suckers

Reproduction: sexual (complex parasitic life cycle)

  • Habitat: salt and freshwater
  • Body plan: bilateral symmetry, cephalization (has a head)
  • Locomotion: ripple to swim
  • Nutrition: hunts for food, tube-like “pharynx” for mouth
  • Reproduction: sexual hermaphroditism, asexual regeneration
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum platyhelminthes5
Porifera  Cnidaria  Platyhelminthes Nematoda  Mollusca  Annelida  Arthropoda Phylum Platyhelminthes

Planarian Flatworms

Parasitic Flatworms

Habitat: inside other animals

Body plan: bilateral symmetry, cephalized

Locomotion: sessile inside host

Nutrition: steals host’s food; head is a “scolex” with suckers

Reproduction: sexual (complex parasitic life cycle)

Key adaptations:

bilateral symmetry, arrow-shaped head, sense organs, ganglia

  • Habitat: salt and freshwater
  • Body plan: bilateral symmetry, cephalized
  • Locomotion: ripple to swim
  • Nutrition: hunts for food, tube-like “pharynx” for mouth
  • sexual hermaphrodites, asexual regeneration
  • Key adaptations:
    • bilateral symmetry, arrow-shaped head, sense organs, ganglia
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum nematoda
Porifera  Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  Arthropoda Phylum Nematoda!
  • Common name: ROUNDWORMS
  • Body plan: bilateral symmetry, cylindrical body with tapered ends
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum nematoda1
Porifera  Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  Arthropoda Phylum Nematoda
  • Locomotion: twitching, flicking motion
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum nematoda2
Porifera  Cnidaria  Platyhelminthes  Nematoda  Mollusca  Annelida  Arthropoda Phylum Nematoda
  • Nutrition: carnivores, herbivores, and decomposers

Free-living roundworms

Parasitic roundworms

Eat off of host

Eat micro-organisms in soil

porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum nematoda3
PoriferaCnidariaPlatyhelminthesNematodaMolluscaAnnelidaArthropoda Phylum Nematoda
  • Reproduction:
    • Sexual; separate males and females; females bigger
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum nematoda4
PoriferaCnidariaPlatyhelminthesNematodaMolluscaAnnelidaArthropoda Phylum Nematoda
  • Coelom?
    • Has some organs, just no COELOM to hold them!
    • Psuedocoelomate.
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum nematoda5
PoriferaCnidariaPlatyhelminthesNematodaMolluscaAnnelidaArthropoda Phylum Nematoda
  • New adaptations
    • Complete digestive tract (an anus!)
    • Semi-terrestrial
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum mollusca
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  Arthropoda Phylum Mollusca!
  • 3 Classes of Mollusks:
    • Bivalves
      • “two shelled”
      • Clams & oysters
    • Gastropods
      • “stomache foot”
      • Snails & slugs
    • Cephalopods
      • “head foot”
      • Octopi, squids, and cuttlefish
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum mollusca1
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Mollusca
  • Body Plan: Bilateral symmetry, soft body with a hard shell (usually)
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum mollusca2
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Mollusca
  • Nutrition:
    • Active hunters

and grazers

    • Scrape up

food w/ radula

porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum mollusca3
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Mollusca
  • Reproduction:
    • Sexual
    • Non-hermaphroditic (dioecious)
    • Both internal and external fertilization
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum mollusca4
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Mollusca
  • Key adaptations:
    • COELOMATE!
    • Advanced eyes
    • Open circulatory system
  • Special:
    • High intelligence, hard shell, beak, jet propulsion
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum annelida
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Annelida!
  • Representative species: earthworms, leeches, polychaetes
  • AKA “Segmented Worms”
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum annelida1
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Annelida
  • Body Plan:
    • Bilaterally symmetrical
    • Long, thin, segmented body
  • New Adaptations:
    • Segmentation
    • Closed circulatory system
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum annelida2
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Annelida
  • Nutrition:
    • Some filter-feed
    • Some graze on plants
    • Some parasites
    • Some are vicious predators
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum annelida3
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Annelida
  • Reproduction:
    • All kinds!
      • Mostly sexual
        • Some hermaphroditic
        • Some dioecious
      • Some asexual
        • Cut in half, have two worms
      • Mostly internal fertilization, some external
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum annelida4
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Annelida
  • New adaptations:
    • Closed circulatory system
      • More efficient delivery of blood/oxygen
    • Segmentation
      • allows better movement and sequential parts
  • Locomotion:
    • Peristaltic movement
    • Parapodia
    • Setae for traction
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda finally phylum arthropoda
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaFinally: Phylum Arthropoda
  • The conquerors!
  • Representatives:
    • insects
    • arachnids
    • crustaceans

Probably more than ten million species.

Whoa.

porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum arthropoda
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Arthropoda
  • Body Plan:
    • Bilateral symmetry
    • Segmented
    • Exoskeleton
    • Jointed appendages
    • Many internal organs

There MUST be a coelom to hold it all in place!

porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum arthropoda1
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Arthropoda
  • Nutrition: Very diverse!
    • Herbivores AND carnivores. . .
    • Grazers, hunters, trappers, parasites. . .
  • Locomotion:Very diverse!
      • Some fly, some swim, some walk or dig

They’re everywhere, eating everything!

porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum arthropoda2
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Arthropoda
  • Reproduction: Very diverse!
    • Mostly dioecious
    • Mostly internal fertilization
    • Mostly have complex metamorphic life cycles.
      • (lay eggs, larvae hatch, larvae grow and metamorphose into adults)
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phylum arthropoda3
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhylum Arthropoda
  • New adaptations:
    • Jointed appendages
      • used for SO MANY THINGS
    • Exoskeleton
      • Protection, anchor muscles, keeps water in body
    • Respiratory system
      • For being totally terrestrial!
    • Terrestrial
porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phyla where we ve been
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhyla: where we’ve been.

Porifera - Sponges

Cnidaria - Jellyfish, Sea Anemones, Hydras

Platyhelminthes - Flatworms

Nematoda - Roundworms

Mollusca - Bivalves, Gastropods, Cephalopods

Annelida - Segmented Worms

Arthropoda - Insects, Arachnids, Crustaceans

porifera cnidaria platyhelminthes nematoda mollusca annelida arthropoda phyla where we re going
Porifera  Cnidaria  Platyhelminthes  Nematoda Mollusca  Annelida  ArthropodaPhyla: where we’re going.

Echinodermata Chordata

? ?

Any guesses about these guys?

here they aaare
Here they aaare:

Echinodermata Chordata