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Metazoa (Multicellularity, heterotrophy, no cell walls), Acoela**,…
Metazoa
(Multicellularity, heterotrophy, no cell walls)
Common ancestor of all animals
Eumetazoa: Animals with tissues
Bilateria: bilateral symmetry and 3 tissue layers
Deuterostomia
(Anus develops from blastopore)
Hemichordata
Chordata
(Notochord, dorsal hollow nerve cord, pharyngeal slits, post-anal tail)
Invertebrate
Cephalochordata (Lancelets)
Urochordata (Tunicates)
Vertebrate
(animals with backbones)
Cyclostomes (jawless fish)
Myxini (hagfish)
Petromyzontida (lampreys)
Gnathostomes (jawed vertebrates)
Osteichthyan (bony fish)
Sarcopterygii
(Lobe-fins)
Dipnoi (lungfish)
Actinistia (coelacanths)
Tetrapods (four-limbed vertebrates, presence of lungs)
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Actinopterygii
Chondrichthyes (cartilaginous fish – sharks, rays)
Echinodermata
(Water vascular system, radial symmetry in adults)
Asteroidea
Ophiuroidea
Echinoidea
Crinoidea
Holothuroidea
Protostomia
Ecdysozoa
Molting (ecdysis)
Loricifera
Priapula
Onychophora
Tardigrada
Nematoda
(presence of a pseudocoelom)
Arthropoda
(Exoskeleton made of chitin, segmented body)
Pancrustaceans
Insecta
Zygentoma
Winged Insects
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Archaeognatha
Crustacean
Copepods
Decapods
Isopods
Myriapods
Chelicerates
Lophotrochozoa
(Lophophore feeding structure or trochophore larvae)
Ectoprocta (produce a calcified exoskeleton)
Platyhelminthes (Acoelomate body plan, pseudocoelem)
Rhabditophorans
Tapeworms
Trematodes
Flatworms
Syndermata (crown of cilia or proboscis)
Acanthocephala
Rotifera
Brachiopoda (contain two valves; dorsal & ventral)
Gastrotricha
Cycliophora
Nemertea
Annelida (metamerism/segmentation)
Errantia
Sedentaria
Polychaeta
Oligochaeta
Hirudinea
Mollusca (presence of mantle & radula)
Cephalopoda
Bivalvia
Gastropoda
Polyplacophora
Cnidaria
(Presence of cnidocytes that contain nematocysts)
Medusozoans
Scyphozoans
Cubozoans
Hydrozoans
Ctenophora
**
Anthozoans
No true tissues
Porifera
(choanocytes)
Acoela**
Placozoa*