bio2135 lct09 annelida 17 - university of...
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Phylum Annelida
10:18 AM
BIO2135 Animal Form & Function1
1. Schizocoel, and metanephridia filtering coelomic fluid
2. Dorsal heart and pericardial cavity
Animal innovations(Symplesiomorphies)
Arthropoda
Chordata
Echinodermata
BrachiopodaPhoronida
AnnelidaMollusca
Bryozoa
Platyhelminthes
Rotifera
NematodaPriapulidaKinorhynchaLoricifera
Cnidaria
Sipuncula
OnychophoraTardigrada
Gnathostomulida
Nemertea
Nematomorpha
Gastrotricha
Ctenophora
Hemichordata
Cycliophora
PlacozoaPorifera
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!! Annelida(autapomorphies)
!!
Arthropoda
Chordata
Echinodermata
BrachiopodaPhoronida
AnnelidaMollusca
Bryozoa
Platyhelminthes
Rotifera
NematodaPriapulidaKinorhynchaLoricifera
Cnidaria
Sipuncula
OnychophoraTardigrada
Gnathostomulida
Nemertea
Nematomorpha
Gastrotricha
Ctenophora
Hemichordata
Cycliophora
PlacozoaPorifera
• Metamerisim of mesodermal structures
• Four bundles of setae formed from beta-chitin
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Annelid development
10:18 AM
BIO2135 Animal Form & Function4
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
SeptaSepta
ProstomiumProstomium
PygidiumPygidium
PeristomiumPeristomium
Metamerism
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BIO2135 Animal Form & Function5
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Chitin
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BIO2135 Animal Form & Function6
CH2OH
CH2OH
OHOH
NHNH
OO
O=C-CH3O=C-CH3
OO
NHNH
O=C-CH3O=C-CH3
OHOH
CH2OH
CH2OH
OO
CH2OH
CH2OH
OHOH
NHNH
OO
O=C-CH3O=C-CH3
OO
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
α-Chitin sheets
β-chitin sheets
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BIO2135 Animal Form & Function7
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Annelid diversity
10:18 AM
BIO2135 Animal Form & Function8
© Nathan Cook
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa 10:18 AM
BIO2135 Animal Form & Function9
Annelid diversity
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Annelid diversity
10:18 AM
BIO2135 Animal Form & Function10
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Annelid diversity
10:18 AM
BIO2135 Animal Form & Function11
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Annelid diversity
10:18 AM
BIO2135 Animal Form & Function12
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Annelid diversity
10:18 AM
BIO2135 Animal Form & Function13
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Annelid diversity
10:18 AM
BIO2135 Animal Form & Function14
© Ajna S. Rivera
Extant Animalia~1,300,000 species
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15
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%)
Tracheata (70.3%)
Others (1.1%)
Chordata (3.5%)
Others (0.4%)
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Earthworm body wall
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BIO2135 Animal Form & Function16
Circular muscle
Longitudinal muscle
Coelom
Seta
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Body wall
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BIO2135 Animal Form & Function17
Epithelium
Circular muscle
Longitudinal muscle
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Earthworm locomotion
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BIO2135 Animal Form & Function18
Longitudinal contracted(setae out)
Circular contracted(setae in)
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Earthworm circulation
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BIO2135 Animal Form & Function19
Dorsal vessel
Subneural vessel
Ventral vessel Aortic arches(“Hearts”)
Lateral vessel
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Earthworm circulation
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BIO2135 Animal Form & Function20
Dorsal vessel
Ventral vessel
Subneural vessel
Nephridial vessel
Intestinal vessel
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Earthworm Digestive system
10:18 AM
BIO2135 Animal Form & Function21
Typhlosole
Chloragogen tissue(Chloragogue)
Gut lumen
Gut wall
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Digestive system
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BIO2135 Animal Form & Function22
Esophagus
Pharynx
GizzardCropCalciferous
glands
Intestine
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Ventral vessel
Dorsalvessel
Bladder
Nephridiopore
Nephrostome
Metanephridium
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BIO2135 Animal Form & Function23
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Nervous system
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BIO2135 Animal Form & Function24
Suprapharyngealganglion
Lateral nerve
Ventral nerve cordCircumpharyngeal
connectives Subpharyngealganglion
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Nervous system
● Giant axon
● Ventral nerve cord
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BIO2135 Animal Form & Function25
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Seminal receptacle
Ovary Ovarian funnel
Seminal vesicle
Testis
Sperm funnel Sperm duct
Reproductive system
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BIO2135 Animal Form & Function26
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Cocoon formation
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BIO2135 Animal Form & Function27
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
NereisErrent polychaete
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BIO2135 Animal Form & Function28
(Photo by: Dave Cowles, July 2005)
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Nereid body wall
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BIO2135 Animal Form & Function29
Notopodium
Longitudinal muscles
Neuropodium Oblique muscles
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Nereid movement
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BIO2135 Animal Form & Function30
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Nereid head
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BIO2135 Animal Form & Function31
Eye
Tentacle
Palp
Cirrus
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Polychaete circulation
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BIO2135 Animal Form & Function32
Dorsal vessel
VentrolateralVentral vesselMidlateral
Dorsolateral
Capillaries
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Polychaete reproduction
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BIO2135 Animal Form & Function33
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Leeches
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BIO2135 Animal Form & Function34
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Leech body wall
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BIO2135 Animal Form & Function35
Circular muscle
Longitudinal muscle
Dorsoventral muscle
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Leech locomotion
10:18 AM
BIO2135 Animal Form & Function36
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Annelida
BIO2135 Animal Form & Function
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Leech body wall
10:18 AM
BIO2135 Animal Form & Function37
Dorsal vessel
Dorsal sinus
Ventral sinus
Nerve cord
Ventral vessel
Lateral sinus
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Hirudinida feeding and digestion
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BIO2135 Animal Form & Function38
CropCrop cecum Intestine
Intestinal cecum
Anus
Université d’Ottawa / University of OttawaUniversité d’Ottawa / University of Ottawa
Hirudinida feeding and digestion
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BIO2135 Animal Form & Function39
Jaws
Pharynx
Esophagous