theme 4 Flashcards
deuterostomia
hemichordata, echinodermata, chordata
lophotrochozoa
platyhelminthes, rotifera, brachiopoda, mollusca, annelida
either lophophore for feeding or trochophore larval stage
ecdysozoa
nematoda, arthropoda
poifera
sponges, lack true tissues, suspension feeders, internal fertilization with varied development
cnidaria
diploblastic, radial symmetry, may alternate polyp (sessile) or medusa (mobile) form, tentacles with cnidocytes to capture prey
incle: medosozoans, hydrozoans, scyphozoans, cubozoans, anthozoans
platyhelminthes
lophotrochozoan
- no cavity, incomplete sigestive, lacking respiratory, flatworms
lophophorates
lophotochozoan
- lophopore and coelom, brachiopods (bivalve mollusc-like) and ectoproca (coral, filter deeders)
mollusca
lophotrochozoans - throchozoa
- unsegmented soft body often with a shell, gills, radula for feeding,
- incl polyplacophora, gastropoda, bivalvia, cephalopoda
annelida
lophotrochozoans - trochozoa
- segmented worms with a hydrastatic skeleton, closed circulatoyry
incl errantia, sedentaria
ecdysozoans
nematoda and arthropoda. periodically moulted cuticle that sclerotizes to be the exoskeleton
nematoda
roundworms/threadworms
- no sigmentation
- digetive tract and hemocoel
arthropoda
segmented pody, jointed appendages, hard exoskeleton, cepahlization
trilobita, chelicerata, myriapoda, custacea, hexapoda
chielicerata
within arthropoda
-cephalothoraz with 6 pairs appendages (chelicera, pedipalps, uniramous legs legs), posterior abdomen
- incl arachnids
myriapoda
arthropoda
- less tagmatization,
- long trunk, tons of uniramous legs legs
crustacea
arthropoda
- three tagmata, biramous legs, antennae, lots of thoracic limbs, abdominal limbs multifunctional
- often biomineralized
hexapoda
arthropoda
- insects with wings
- head (antennae, mouthparts), thorax (3 pairs legs, wings), abdomen
apterygote/pterygote
insects without/with wings
echinoderm
radal summetry, ossicled endoskeleton, diffuse nervous system, broadcast sponners, madreporite for water vascular system
chordate traits
notochord, dorsal hollow nerve chord, pharyngeal slits, muscular post anal tail
invertebrate chordates
cephlachordata (lancelets), urochordata (tunicates)
vertenrate traits
vertenral column, elaborate braincase, 2+ hoz gene sets, neural crest eclls, dorsal/anal/tail find with fin rays, complex circulator sustem
vertebrates
cyclostomes, gnathostomes, chondrichtyans,
cyclostomes
jawless fish, often with reduced vertebrae
gnathostomes
opposing jaws, mineralized skeletons (teeth), lateral appendages, 4 sets hox genes, enlarged forebrain (smell/vision), vibrations in water