Phylum (Class) Key Names and ExamplesPorifera Sponge AsymmetricalCnidaria RadialPlatyhelminthsNematoda BilateralRotifera Rotifers BilateralAnnelida Earthworm, leech BilateralMolluska BilateralAnt, dragonfy BilateralSpider, scorpion BilateralLobster, crayfsh, crab BilateralSymmetry of Body PlanHydra, jellyfsh, sea anenome, corallat worms, trematoda, f!"es, tapeworm, planarianBilateral w# cephali$ationRo!nd worm, hoo" worm, trichina, %& elegans, ascarcis%lam, snail, sl!g, s'!id, octop!s, cephalopod, gastropodArthropoda (nse!ta)Arthropoda (Ara!hnida)Arthropoda (Crusta!ea)E!hinodermataChordata (ertebrates BilateralStarfsh, sea !rchin, sea c!c!mberBilateral )lar*ae+, f*efold radial )ad!lt+"issue #r$ani%ation Coelom Cir!ulatory System,o tr!e tiss!es )para$oa+ n#a ,one )di-!sion+n#a ,one )di-!sion+.riploblasts, e!mata$oa Acoelomate ,one )di-!sion+.riploblasts, e!mata$oa /se!docoloemate ,one )di-!sion+.riploblasts, e!mata$oa /se!docoloemate ,one )di-!sion+.riploblasts, e!mata$oa %oelomate.riploblasts, e!mata$oa %oelomate 0ainly open.riploblasts, e!mata$oa %oelomate.riploblasts, e!mata$oa %oelomate.riploblasts, e!mata$oa %oelomate1iploblasts, tr!e tiss!es )e!meta$oa+%losed circ!latory system, m!ltiple pairs of aortic arches, distinct arteries and *eins2pen circ!latory system, hemolymph2pen circ!latory system, hemolymph2pen circ!latory system, hemolymph.riploblasts, e!mata$oa %oelomate 2pen, no heart.riploblasts, e!mata$oa %oelomate See other tableNer&ous System Respiratory System 'i$esti&e System,one ,one )di-!sion+,er*e net, no brain ,one )di-!sion+,one )di-!sion+,er*e chord and ring ,one )di-!sion+ Alimentary canal, one way,one )di-!sion+,one )di-!sion+3ills.rachea or boo" l!ngsSome ha*e gills4ntracell!lar digestion )*ia amoebacytes+3astro*asc!lar ca*ity, two way digestion.wo ner*e cords, anterior centrali$ed ganglia )brain+, some planarians ha*e eye spots3astro*asc!lar ca*ity, two way digestion%erebral ganglia )brain+ w# some ner*es e5tening thro!gh bodyAlimentary canal, mo!th and an!s(ental ner*e chord, anterior ganglia )brain+Alimentary canal, mo!th and an!s(entral ner*e chords and brain%omplete, mo!th and an!s, rad!la!sed ganglia, *entral ner*e chordSpiracles and tracheal t!bes2ne6way digestion, some ha*e sali*ary glands!sed ganglia, *entral ner*e chord2ne6way digestion, some ha*e sali*ary glands!sed ganglia, *entral ner*e chord2ne6way digestion, some ha*e sali*ary glands,one )di-!sion+ %omplete, mo!th and an!sSee other table,er*e ring and radial ner*es(eneral Chara!teristi!s,one )di-!sion+ 6,one )di-!sion+ 66,one )di-!sion+ 66/rotostome,ephridia /rotostome/rotostome/rotostome/rotostomeEx!retory SystemEm)ryoni! 'e&elopmentSessile, suspension feeders, aquatic habitats, earliest animals, can produce asexually (budding) or sexually (hermaphadytes), used in production of antibioticsA'!atic habitats, some ha*e stinging cells )nemotocysts+, some ha*e life cycle that switches between polyp and med!sa forms, se5!al or ase5!al reprod!ction, gastro*asc!lar ca*ity acts as hydrostatic s"eleton to aid in mo*ement/rotonephridia and fame cells%an reprod!ce se5!ally )hermaphrodites+ or ase5!ally )regeneration+, mainly a'!atic habitats, parasitic lifestyles, most primiti*e of triploblastic animals, has organs& .apewormsspecifcally don7t ha*e a tr!e digesti*e tract, they j!st absorb food aro!nd them&Some ha*e c!ticle to pre*ent degradation by host digesti*e system, longit!dinal m!scles, no circ!lar m!scles, parasitic, not segmented/rotonephridia and fame cells,ot tr!le segmented, can reprod!ce se5!ally or parthenogenetically, mostly freshwater en*ironments& 1raw food and water into mo!th by beating cilia&0ost ha*e metanephridiaSegmented bodies, coelom is di*ided by septa, se5!al )hermaphrodites+ and ase5!al )regeneration+ reprod!ction, longit!dinal and circ!lar m!scles(isceral mass, calci!m carbonate mantle, rad!la )tong!e+, a'!atic or terrestial habitats, ha*e hemocoel0alpighian t!b!lesE5os"eleton, jointed appendages, coelomates,three pairs of legs, chitono!s e5os"eleton, more species than any other phyl!m combined, metamorphosis0alpighian t!b!les and#or co5al glandsE5os"eleton, jointed appendages, coelomates, fo!r pairs of legs, land habitats.errestrial8!se malpighian9 A'!atic !se green glandsE5os"eleton, jointed appendages, coelomates, a'!atic habitats,one )di-!sion+ 1e!terostomeSee other table 1e!terostome See 7/hyl!m %hordata7 SheetSpiny, central dis", water *asc!lar system, t!be feet, se5!al or ase5!al reprod!ction, closest related major phyla to chordatesSu)phylum Class Examples Symmetryn#a Bilateral*erte)rata ish ):awless+ Bilateral*erte)rata ish )%artilagino!s+ Shar" Bilateral*erte)rata ish )Bony+ Salmon, halib!t Bilateral*erte)rata Amphibia Bilateral*erte)rata Bilateral*erte)rata ;angaroo, oppos!m Bilateral*erte)rata Bilateral*erte)rata Reptilia Bilateral*erte)rata Birds Eagle, bl!e jay Bilateral notochorddorsal hollow ner*e cordpharyngeal slitspost6anal tail+ro!hordata and Cephalo!hordata (amphioxus).!nicates, lancelets )amphio5!s+, sea s'!irtsagnatha, lamprey, hagfsh.adpole, frog, toad, salamander, newt0ammalia )0onotremes+1!c"bill platyp!s, spiny anteater0ammalia )0ars!pials+0ammalia )/lacental+Bat, whale, mo!se, h!man.!rtle, sna"e, crocodile, alligator, shared key !hara!teristi!s of !hordates"issues Coelome Cir!ulatory System Ner&ous System%oelomate heart /rimiti*e%oelomate .wo chambered heart %omplete, brain%oelomate .wo chambered heart %omplete, brain%oelomate .wo chambered heart %omplete, brain%oelomate .hree chambered heart %omplete, brain%oelomate o!r chambered heart %omplete, brain%oelomate o!r chambered heart %omplete, brain%oelomate o!r chambered heart %omplete, brain%oelomate .hree chambered heart %omplete, brain%oelomate o!r chambered heart %omplete, brain.riploblasts, e!mata$oa.riploblasts, e!mata$oa.riploblasts, e!mata$oa.riploblasts, e!mata$oa.riploblasts, e!mata$oa.riploblasts, e!mata$oa.riploblasts, e!mata$oa.riploblasts, e!mata$oa.riploblasts, e!mata$oa.riploblasts, e!mata$oaRespiratory System 'i$esti&e System