Bio Lab 12: Echinoderms and Chordates Flashcards
Phlyum Echinodermata
Marine Bottom dwellers Penta-radial symmetry Ossicles = skeleton Water vascular system (no gills, water pumped to breathe) Move by tube feet 5 Classes
Class Crinoidea
of Phylum Echinodermata
Sea lillies and feather starts
Have (pinnule, arms, calyx) = crown, and stalk
Class Asteroidea
Sea stars (dissection)
Predators
Can expel stomach to catch prey and digest it
Have spines, pedicellariae that look like forceps, central disk and anus
Class Ophuridea
of Phylum Echinodermata
Brittle stars
Legs break off if force is applied
Ambulica canals are internal
Class Echnoidea
of Phylum Echinodermata
Sea urchins, sand dollars
“Aristotles lantern” mouth structure
Class Holothuroidea
of Phylum Echinodermata
Sea cucumber
Only one that is long in the anterior/posterior direction
Phylum Chordata
4 Traits of All Chordates: -Dorsal nerve cord -Notocord (backbone in verts) -Pharyngeal gill slits -Post-anal tail 3 Sub Phyla
SubPhylum Urochordata
Of Phylum Chordata Sea squirts filter feeders Looks like sponge Sexual and asexual Often colonial
Subphlyum Cephalochordata
of Phlyum Chordata
No bones
Subphylum Vertebrata
of Phylum Chordata Body plan: -cranium -highly cephalized -endoskeleton -closed circulatory system 2 Clades
Clades of Subphylum Vertebrata
Jawed Fishes:
- 3 Classes
- Class Chondrichthyces: sharks and rays
- Class Actinoptergii: most common fish
- Class Sarcoptergii: lobe finned fishes
Clade Tetrapods:
- 3 Classes
- Class Reptila
- Class Mammalia
- Class Amphibia
Class Chondrichthyes
of Phlyum Chordata, SP Vertebrata, Clade Jawed Fishes Sharks and rays cartilage endoskeleton scales called plucoid sense electrical field buoyancy managed by oil in liver Heteroceracel (asymetric) tail fin
Class Actinoptergii
of Phlyum Chordata, SP Vertebrata, Clade Jawed Fishes Most common fish seahorses, trout (dissection), salmon ray fin bony endoskeleton buoyancy managed by air blatters homoceracel (symmetric) tail
Class Sarcoptergii
of Phlyum Chordata, SP Vertebrata, Clade Jawed Fishes Lobe finned fish 8 extant species lung fish, coelocanthes articulating appendages with fins on end Dipherceracal tail
Class Amphibia
of Phlyum Chordata, SP Vertebrata, Clade Tetrapoda
Frogs (dissection), salamanders
Double life: juveniles live in water, adults on land
Cutaneous respiration: breathe thru skin and lungs
Non amniotic eggs
Bioindicators
