animal classifications: sponges, diploblasts, triploblasts Flashcards
phylum: porifera
Tissues: No distinct tissues
Symmetry: Mostly asymmetrical
Mode of feeding: Suspension feeders
Specialized feeding cells: choanocytes
Includes: sponges
phylum: cnidaria
Diploblast or triploblast? Diploblast
• Symmetry: Radial
• Digestive space: Gastrovascular cavity
• Nervous system: Nerve net
• Feeding: Predators
• Specialized cells: Cnidocytes with
nematocysts; sting and immobilize prey
• Life cycle: Up to three stages (polyp,
medusa, larva)Includes: Jellyfishes, sea anemones, corals, box jellyfishes
phylum: centophora
• Diploblast or triploblast? Diploblasts
• Symmetry: Radial symmetry
• Nervous system: Nerve net
• Digestive space: Gastrovascular cavity
• Locomotion: Eight rows of cilia for
swimming
phylum: rotifera
Triploblasts; protostomes Mode of feeding: Suspension
feeding; rings of cilia around mouth Large or small: Small
phylum: platyhelminthes
Triploblasts; protostomes
Coelom present?
No Rounded or flat body? Flat Digestive space
Free-living: gastrovascular cavity
Parasites: none
Includes: Planarians, parasitic
tapeworms, parasitic flukes
phylum: mollusca
Triploblasts, protostomes
Coelom: Reduced Distinctive body structure:
Muscular foot (locomotion, feeding)
Mantle (secretes shell, surround mantle cavity)
Visceral mass
Includes: Gastropods, bivalves,
cephalopods
phylum mollusca
class gastropoda
• Rasping feeding structure: Radula
• Circulatory system: Open
• Shell: One piece, if present
• 180o twisting of digestive tract: Torsion
• Includes: Snails, slugs, sea slugs,
limpets, welks, conches
phylum mollusca
class bivalvia
• Feeding: Suspension feeders
• Water pump: Siphon
• Circulatory system: Open
• Shell: Two pieces
• Fertilization: External
• Includes: Clams, oysters, mussels,
scallops
phylum mollusca
class: cephalopoda
• Feeding: Predators
• Muscular foot: Ring of tentacles around
mouth
• Circulatory system: Closed
• Water pump: Siphon
• Defense: Jet propulsion, ink, camouflage
• Includes: Octopuses, squids, cuttlefishes,
nautiluses
phylum: annelida
• Triploblasts, protostomes
• Segmented or unsegmented body:
segmented
• Flat or rounded body? Rounded
• Type of skeleton: Hydrostatic
• Open or closed circulatory system? Closed
• Appendages: bristle-like chaetae (some)
• Includes: earthworms, leeches, marine
bristle worms
phylum: nematoda
• Triploblasts, protostomes
• Segmented or unsegmented body:
segmented
• Flat or rounded body? Rounded
• Type of skeleton: Hydrostatic
• Open or closed circulatory system? Closed
• Appendages: bristle-like chaetae (some)
• Includes: earthworms, leeches, marine
bristle worms
phylum: tardigarada
Triploblasts, protostomes
• Cuticle or exoskeleton? Cuticle
• # of legs: Eight
• Vulnerable or resistant to harsh conditions:
Resistant
• Includes: Water bears
phylum: onychophora
Triploblasts, protostomes Cuticle or exoskeleton: Cuticle Method of catching prey: Sprays
slime
Includes: Velvet worms
phylum: arthropoda
• Triploblasts, protostomes
• Cuticle or exoskeleton? Exoskeleton with
chitin
• Appendages: Jointed
• Closed or open circulatory system? Open
• Reduced or extensive coelom? Reduced
• Includes: Spiders, scorpions, centipedes,
millipedes, crustaceans, insects
phylum arthropoda
subphylum: chelicerata
• Fanglike appendages: Chelicerae
• Armlike appendages: Pedipalps
• # of walking legs: 4 pairs (8 total)
• Antnennas: None
• Body regions: Cephalothorax, abdomen
