Renilla is related to corals but differs from them in that it is a collection
of polyps having different forms and functions.
Phylum?
Cnidaria
Class?
Anthozoa
Common name? Sea pansy
Phylum? Cnidaria
Class? Hydrozoa
Body form? Polyp
Obelia colony
Feeding polyp
Phylum? Cnidaria
Class? Hydrozoa
Reproductive polyp
Medusa bud – produced asexually
Phylum?
Class?
Cnidaria
What is this? This is an Obelia medusa as seen
under a compound microscope
Hydrozoa
How does this reproduce?
Sexually by producing eggs or sperm
Phylum? Cnidaria
Class?
Hydrozoa
What is the
significance of the
velum in the
taxonomy of this
organism?
The velum is
a characteristic
of hydrozoan
jellies. Thus
Gonionemus is
in Class Hydrozoa
A
B
C
D
Goniomenus
A:
Exumbrella
B:
Subumbrella
C:
Manubrium
D:
Velum
A: Tentacles
A
B
C: Gonad
B: Oral arm
C
Phylum? Cnidaria
Class? Hydrozoa
Physalia Tentacle
Identify Cells
Cnidocytes with nematocysts
Phylum Cnidaria
Class Hydrozoa
2. Identify structure within cell
PhysaliaPhylum
Tentacle
Cnidaria
Nematocyst
Class Hydrozoa
1. Identify
cell
Physalia
Tentacle
Cnidocytes with nematocysts
Cnidocyte
Phylum Cnidaria
Class Hydrozoa
Physalia Tentacle
Cnidocytes with undischarged?
Nematocysts
Tentacle: Note Cnidocytes
Bud
(Asexual
Reproduction)
Phylum? Cnidaria
Class Hydrozoa
Hydra - Polyp
Phylum Cnidaria
Class Hydrozoa
Obelia
What stage of the lifecycle does this represent?
(Sexually Reproduces)
Medusa stage
Phylum Cnidaria
Class Hydrozoa
Obelia Colony – A Colony of? Polpys
Asexual Stage
Reproductive Polyp
Medusa
Bud
Feeding Polyp
Phylum?
Cnidaria
Class?
Hydrozoa
Common Name?
Portuguese Man-of-War
Common Name?
By-the-wind sailor or Velella
Common name?
Phylum?
Class?
A
B
Phylum? Cnidaria
Class? Scyphozoa
Common Name? Moon Jellly
Phylum?
Cnidaria
Class?
Anthozoa
Common Name?
Sea Anemone
Kingdom?
Phylum?
Animalia
Ctenophora
Common name?
Comb Jelly
How does this animal move?
Via cilia. They have 8 rows of
ciliated combs
How does this animal capture
its food?
They have specialized cells called
colloblasts on their tentacles that
secrete a “glue-like” substance.
A: Cnidocyte
B: Epidermis
C: Mesoglia
B
D: Gastrodermis
C
E:
Gastrovascular cavity
D
A
E
What is this?
Kingdom?
Phylum?
Class?
B
A
C
D
E
•
•
•
•
•
•
•
•
•
Hydra
Kingdom Animalia
Phylum Cnidaria
Class Hydrozoa
A: Gastrodermis
B: Tentacle
C: Gastrovascular cavity
D: Epidermis
E: Gastrovascular cavity
D
A
B
C
F
E
G
Phylum?
Class?
What is this?
Phylum Cnidaria
Class Hydrozoa
Obelia
•
•
•
•
•
•
•
A: Feeding polyp
B: Medusa bud
C: Tentacles
D: Medusa
E: Ciliated planula larva
F: Reproductive polyp
G: Obelia colony
A
E
B
C
D
Kingdom?
Phylum?
Class?
Kingdom Animalia
Phylum Cnidaria
Class Scyphozoa (The Moon Jelly)
•
•
•
•
•
A: Exumbrella
B: Subumbrella
C: Mouth
D: Oral arms
E: Mesoglia
B
A
C
D
•
•
•
•
A: Feeding polyp
B: Reproductive polyp
C: Medusa
D: Ciliated planula larva
B
C
D
A
E
•
•
•
•
•
A: Cnidocyte
B: Epidermis
C: Mesoglia
D: Gastrodermis
E: Gastrovascular cavity
A
B
C
D
E
F
•
•
•
•
•
•
A: Tentacle
B: Peristome
C: Mouth
D: Pharynx
E: Gastrovascular cavity
F: Basal disc
Phylum?
Class?
B
A
C
D
E
Gonionemus medusa
Phylum Cnidaria
Class Hydrozoa (It has a velum!)
•
•
•
•
•
A: Manubrium
B: Radial canal
C: Gonad
D: Velum
E: Tentalce
Phylum?
Class?
Common name?
A
B
C
D
E
Phylum Annelida
Class Polychaeta
The Sandworm (A carnivorous predator)
•
•
•
•
•
A: Jaws
B: Tentacles
C: Segment
D: Parapodium
E: Setae
B
A
C
D
F
E
•
•
•
•
•
•
A: Eyes
B: Segments
C: Setae
D: Parapodium
E: Pharynx
F: Jaws