Download Echinodermata

Echinodermata
Porifera
Placozoa
Cnidaria
Ctenophora
Platyhelminthes
Gastrotricha
Gnathostomulida
Cycliophora
Rotifera
Annelida
Mollusca
Sipuncula
Nemertea
Brachiopoda
Phoronida
Bryozoa
Arthropoda
Tardigrada
Onychophora
Nematomorpha
Nematoda
Priapulida
Kinorhyncha
Loricifera
Echinodermata
Hemichordata
Chordata
Phylum Echinodermata
!
Deuterostomia
!
(autapomorphies)
• Blastopore becomes the anus
• Tripartite coelom
• Dipleurula larval stage
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Blastopore (Gastrulation)
Enterocoelous coelom
Ectoderm
Blastocoel
Endoderm
Ectoderm
Blastopore
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Tripartite coelom
Endoderm
Mesoderm
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Dipleurula larva
Preoral lobe
Mesocoel
Protocoel
Mouth
Metacoel
Ciliated band
Esophagous
Mouth
Stomach
Anus
Anus
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Echinodermata
Echinodermata
!
(Autapomorphies)
•
•
•
•
Pentaramous symmetry
Stereom spicules
Water vascular system
Mutable connective tissue
!
Porifera
Placozoa
Cnidaria
Ctenophora
Platyhelminthes
Gastrotricha
Gnathostomulida
Cycliophora
Rotifera
Annelida
Mollusca
Sipuncula
Nemertea
Brachiopoda
Phoronida
Bryozoa
Arthropoda
Tardigrada
Onychophora
Nematomorpha
Nematoda
Priapulida
Kinorhyncha
Loricifera
Echinodermata
Hemichordata
Chordata
Star fish
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~1,300,000 species
Parazoa (1.2%)
Radiata (0.9%)
Protostomia (3.9%)
Platyzoa (2.2%)
Platyhelminthes (1.9%)
Others (0.3%)
Lophotrochozoa (9.8%)
Mollusca (8.5%)
Annelida (0.9%)
Others (0.5%)
Ecdysozoa (82.0%)
Crustecea (3.1%)
Chelicerata (7.6%)
Atelocerata(70.3%)
Others (1.1%)
Deuterostomia (4.0%)
Chordata (3.5%)
Others (0.4%)
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Sea urchins
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Sand dollars
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Extant Animalia
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Brittle stars
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Echinodermata
Sea cucumber
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Ancient Echinoderms
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Ancestral echinoderms
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Echinoderm surfaces
Tube feet and
ambulacral
groove
Aboral surface
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Water vascular system
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Role of the water vascular system
(Ambulacral system)
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Oral surface
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Locomotion
Circulation
Respiration
Excretion
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Echinodermata
Water vascular system
Tube feet
Madreporite
Stone canal
Ring canal
Tiedemann’s
bodies
Polian
vesicles
Radial canal
Lateral canal
Tube feet
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Tube foot
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Movement of tube feet
Ampulla
Lateral canal
Body wall
Tube foot
Retractor
muscles
Podial muscle
Sucker
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Body wall
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Pedicellaria
Spine
Pedicellaria
Dermal
branchia
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Echinodermata
Digestive system
Sea star
Gonad
Anus
Anus
Pyloric stomach
Pyloric stomach
Cardiac stomach
Cardiac stomach
Digestive gland
Mouth
(Pyloric cecum)
Pyloric cecum
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Feeding
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Reproductive system
Gonad
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Echinoidea
Sea star arm
Sea urchins
Spine
Dermal branchia
Ossicle
Digestive gland
Coelom
Gonad
Tube foot
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Echinodermata
Echinoidea
Water vascular system
Echinoid spines and pedicellaria
Madreporite
Axial organ
Ring canal
Radial canal
Tube feet
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Echinoidea
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Aristotle’s lantern
Oral surface
“Gill”
Epiphysis
Ambulacrum
Tooth
Openings for
tube feet
Pyramid
Teeth of lantern
Lantern retractor
Peristomial
membrane
Lantern protractor
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Echinoidea
Echinoidea
Aristotle’s
lantern
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Digestive system
Tooth
Pyramid
Aboral intestine
Anus
Esophagus
Aristotle’s lantern
Siphon
Compass
Epiphysis
Tube feet
Dental sac that
forms tooth
Gonad
Oral intestine
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(stomach)
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