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Echinodermata Phylum Echinodermata BIO 2135 Animal Form & Function 1 Université d’Ottawa / University of Ottawa ! Deuterostomia 13:07 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 ! (autapomorphies) • Blastopore becomes the anus • Tripartite coelom • Dipleurula larval stage Blastopore (Gastrulation) Ectoderm Blastocoel Endoderm Blastopore BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 3 13:07 BIO2135 Animal Form and Function Page 1 Echinodermata Enterocoelous coelom Ectoderm Endoderm Mesoderm BIO 2135 Animal Form & Function 4 Université d’Ottawa / University of Ottawa 13:07 Tripartite coelom Mesocoel Protocoel Metacoel Mouth Anus BIO 2135 Animal Form & Function 5 Université d’Ottawa / University of Ottawa 13:07 Dipleurula larva Preoral lobe Mouth Ciliated band Esophagous Stomach Anus BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 6 13:07 BIO2135 Animal Form and Function Page 2 Echinodermata Echinodermata ! (Autapomorphies) • • • • Pentaramous symmetry Stereom spicules Water vascular system Mutable connective tissue Extant Animalia ~1,300,000 species ! 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 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%) 8 13:07 Star fish BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 9 13:07 BIO2135 Animal Form and Function Page 3 Echinodermata Sea urchins BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 10 13:07 Sand dollars BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 11 13:07 Brittle stars BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 12 13:07 BIO2135 Animal Form and Function Page 4 Echinodermata Sea cucumber BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 13 13:07 Ancient Echinoderms BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 14 13:07 Ancestral echinoderms BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 15 13:07 BIO2135 Animal Form and Function Page 5 Echinodermata Echinoderm surfaces Tube feet and ambulacral groove Aboral surface Oral surface BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 16 13:07 Water vascular system (Ambulacral system) BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 17 13:07 Role of the water vascular system ● ● ● ● Locomotion Circulation Respiration Excretion BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 18 13:07 BIO2135 Animal Form and Function Page 6 Echinodermata Water vascular system Madreporite Stone canal Ring canal Tiedemann’s bodies Polian vesicles Radial canal Lateral canal Tube feet BIO 2135 Animal Form & Function 19 Université d’Ottawa / University of Ottawa 13:07 Tube feet BIO 2135 Animal Form & Function 20 Université d’Ottawa / University of Ottawa Tube foot 13:07 Ampulla Lateral canal Body wall Tube foot Retractor muscles Podial muscle Sucker BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 21 13:07 BIO2135 Animal Form and Function Page 7 Echinodermata Movement of tube feet BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 22 13:07 Body wall BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 23 13:07 Pedicellaria Spine Pedicellaria Dermal branchia BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 24 13:07 BIO2135 Animal Form and Function Page 8 Echinodermata Digestive system Anus Pyloric stomach Cardiac stomach Digestive gland (Pyloric cecum) BIO 2135 Animal Form & Function 25 Université d’Ottawa / University of Ottawa 13:07 Sea star Gonad Anus Pyloric stomach Cardiac stomach Mouth Pyloric cecum BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 26 13:07 Feeding BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 27 13:07 BIO2135 Animal Form and Function Page 9 Echinodermata Reproductive system Gonad BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 28 13:07 Sea star arm Spine Dermal branchia Ossicle Digestive gland Coelom Gonad Tube foot BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 29 13:07 Echinoidea Sea urchins BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 30 13:07 BIO2135 Animal Form and Function Page 10 Echinodermata Echinoidea Water vascular system Madreporite Axial organ Ring canal Radial canal Tube feet BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 31 13:07 Echinoid spines and pedicellaria BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 32 13:07 Echinoidea Oral surface “Gill” Ambulacrum Openings for tube feet Teeth of lantern Peristomial membrane BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa 33 13:07 BIO2135 Animal Form and Function Page 11 Echinodermata Aristotle’s lantern Epiphysis Tooth Pyramid Lantern retractor Lantern protractor BIO 2135 Animal Form & Function 34 Université d’Ottawa / University of Ottawa 13:07 Echinoidea Aristotle’s lantern Tooth Pyramid Compass Epiphysis Dental sac that forms tooth BIO 2135 Animal Form & Function 35 Université d’Ottawa / University of Ottawa 13:07 Echinoidea Digestive system Aboral intestine Anus Esophagus Aristotle’s lantern Siphon Tube feet Gonad Oral intestine BIO 2135 Animal Form & Function Université d’Ottawa / University of Ottawa (stomach) 36 13:07 BIO2135 Animal Form and Function Page 12
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