bio2135 lct12 echinodermata 17 - digital...
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Echinodermata
BIO2135 Animal Form and Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa 13:07
BIO 2135 Animal Form & Function1
Phylum Echinodermata
Arthropoda
Chordata
Echinodermata
BrachiopodaPhoronida
AnnelidaMollusca
Bryozoa
Platyhelminthes
Rotifera
NematodaPriapulidaKinorhynchaLoricifera
Cnidaria
Sipuncula
OnychophoraTardigrada
Gnathostomulida
Nemertea
Nematomorpha
Gastrotricha
Ctenophora
Hemichordata
Cycliophora
!!
• Blastopore becomes the anus• Tripartite coelom• Dipleurula larval stage
Deuterostomia(autapomorphies)
!!
PlacozoaPorifera
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Blastopore (Gastrulation)
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Blastocoel
Ectoderm
Endoderm
Blastopore
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Enterocoelous coelom
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MesodermEndodermEctoderm
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Tripartite coelom
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Mouth
ProtocoelMesocoel
Metacoel
Anus
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Dipleurula larva
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Preoral lobe
Ciliated band
Mouth
Esophagous
Stomach
Anus
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Echinodermata
BIO2135 Animal Form and Function
!!
Arthropoda
Chordata
Echinodermata
BrachiopodaPhoronida
AnnelidaMollusca
Bryozoa
Platyhelminthes
Rotifera
NematodaPriapulidaKinorhynchaLoricifera
Cnidaria
Sipuncula
OnychophoraTardigrada
Gnathostomulida
Nemertea
Nematomorpha
Gastrotricha
Ctenophora
Hemichordata
Cycliophora
PlacozoaPorifera
!!
• Pentaramous symmetry• Stereom spicules• Water vascular system• Mutable connective tissue
Echinodermata(Autapomorphies)
Extant Animalia~1,300,000 species
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Deuterostomia (4.0%)
Protostomia (3.9%)
Platyzoa (2.2%)
Lophotrochozoa (9.8%)
Radiata (0.9%)
Parazoa (1.2%)
Platyhelminthes (1.9%)
Others (0.3%)
Mollusca (8.5%)
Annelida (0.9%)
Others (0.5%)
Ecdysozoa (82.0%)
Crustecea (3.1%)
Chelicerata (7.6%)
Atelocerata(70.3%)
Others (1.1%)
Chordata (3.5%)
Others (0.4%)
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Star fish
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Sea urchins
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Sand dollars
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Brittle stars
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Echinodermata
BIO2135 Animal Form and Function
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Sea cucumber
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Ancient Echinoderms
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Ancestral echinoderms
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Echinoderm surfaces
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Aboral surfaceAboral surface Oral surfaceOral surface
Tube feet andambulacralgroove
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BIO 2135 Animal Form & Function17
Water vascular system(Ambulacral system)
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Role of the water vascular system
● Locomotion
● Circulation
● Respiration
● Excretion
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BIO 2135 Animal Form & Function18
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Echinodermata
BIO2135 Animal Form and Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Water vascular system
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Madreporite
Ring canal
Stone canal
Radial canal
Lateral canal
Tube feetPolianvesicles
Tiedemann’sbodies
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Tube feet
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Tube foot
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Lateral canal
Ampulla
Body wall
Tube foot
Retractor muscles
Sucker
Podial muscle
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Movement of tube feet
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Body wall
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Pedicellaria
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Spine
Pedicellaria
Dermalbranchia
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Echinodermata
BIO2135 Animal Form and Function
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Digestive system
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Cardiac stomach
Pyloric stomach
Anus
Digestive gland(Pyloric cecum)
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Sea star
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Cardiac stomach
Mouth
Pyloric stomach
Pyloric cecum
Gonad Anus
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Feeding
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Reproductive system
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Gonad
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Sea star arm
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Spine
Digestive gland
Gonad
Tube foot
Dermal branchia
Coelom
Ossicle
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Echinoidea
Sea urchins
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Echinodermata
BIO2135 Animal Form and Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Echinoidea
Water vascular system
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Ring canal
Radial canal
Tube feet
Madreporite
Axial organ
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Echinoid spines and pedicellaria
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Echinoidea
Oral surface
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Ambulacrum
“Gill”
Openings fortube feet
Teeth of lantern
Peristomialmembrane
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Aristotle’s lantern
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Epiphysis
Lantern retractor
Lantern protractor
Tooth
Pyramid
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EchinoideaAristotle’s lantern
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Epiphysis
Dental sac thatforms tooth
Tooth
Pyramid
Compass
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Echinoidea
Digestive system
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Aristotle’s lantern
Esophagus
Siphon
Oral intestine(stomach)
Aboral intestine
Anus
Gonad
Tube feet