Animal Diversity
Metazoa
Eumetazoa
Bilateria
Deuterostomia
Ecdysozoa
Lophotrochozoa
Cnidaria (hydras, jellies, sea anemones, corals)
Echinodermata (sea stars, sea urchins)
Arthropoda (spiders, centipedes, crustaceans, & insects)
Chordata
Nematoda (roundworms)
Annelida (segmented worms)
Mollusca (clams, snails, squids)
Syndermata (rotifers and acanthocephalans)
Lophophorates
Platyhelminthes (flatworms)
Ectoprocta/Brachiopoda
Vertebrates
Cephalochordata (lancelets)
Gnathostomes
Cyclostomes
Chondrichthyes (sharks, rays, skates, ratfishes)
Osteichthyans
Actinopterygii (ray-finned fishes)
Lobe-fins
Dipnoi (lungfishes)
Tetrapods
Actinistia (coelacanths)
Amphibia (salamanders, frogs, caecilians)
Amniotes
Reptilia (tuataras, lizards and snakes, turtles, crocodilians, birds)
Mammalia (monotremes, marsupials, eutherians)
Urochordata (tunicates)
Myxini (hagfishes)
Petromyzontida (lampreys)
lack tissues; have choanocytes (collar cells- flagellated cells that ingest bacteria and tiny food particles
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contain some form of symmetry, well-defined organs, mouth, and digestive tract
Distinct front, back, top, bottom; An antero-posterior axis (rather than an oral-aboral axis); Bilateral symmetry
distinctive, horseshoe-shaped feeding structure called a lophophore, and/or a distinctive larval form known as a trochophore
No circulatory system; undergo ecdysis, jointed appendages, exoskeleton
Unique water vascular system; endoskeleton, dorsal, hollow nerve cord, pharyngeal slits, post-anal tail
Nobody cavity; dorsoventrally flattened; gastrovascular cavity or no digestive tract
have lophophores (feeding structures bearing ciliated tentacles
Hemocoel; rotifers have alimentary canal (digestive tube with mouth and anus) and jaws (trophil); acanthocephalans are parasites of vertebrates
Hemocoel; reduced coelom; three main body parts (muscular foot, visceral mass, mantle) most have hard shell made of calcium carbonate
Coelom; body wall and internal organs are segmented (except the digestive tract which is unsegmented
Tapered ends, no circulatory system, undergoes ecdysis
segmented body, jointed appendages and exoskeleton made of protein and chitin
Bilaterally symmetrically larvae and five-part body organization
dorsal, hollow nerve cord, post anal tail,and pharyngeal slits
Basal chordates; marine suspension feeders that exhibit four key derived characters of chordates
Marine suspension feeders, larvae display derived traits of chordates
Has a cartilaginous skeleton
Bony skeleton and maneuverable fins
Aquatic lobe-fins, has muscular fins or limbs
freshwater lobe fins, moist skin, many live in water and on land
4 limbs descended from modified fins, moist skin for gas exchange, live on both land & water
amniotic eggs and a rib cage ventilation
hair and produce milk
Amniotic egg, rib cage ventilation
four limbs, neck, fused pelvic girdle
Muscular fins or limbs
bony skeleton
jawless vertebrates
Jawless aquatic vertebrates with reduced vertebrate
some lampreys feed by attaching to a live fish and ingesting blood
Hox gene duplication, backbone of vertebrae
hinged jaws, four sets of Hox genes
Porifera (sponges)
Unique stinging structures (nematocysts) housed in specialized cells (cnidoctyes); diploblastic; radially symmetrical; gastrovascular cavity (digestive with a single opening
Lack tissues
Group 2 of Class A: Sirajummuneer Ahmad, Joann Lee, Isaak Mangubat, Benedicte Ogazon, Sophia Rose Villa Martinez, Brandon Ace Villareal, Makya Warren