Invertebrate Chordates Flashcards
Lophophorates
Phoronida
Ectoprocta
Brachiopoda
Phoronida
Horse shoe worm
Live in tubes made of chitin
Has a lophophore - covered in cilia - water current - food particles trapped by mucus - tentacles pass food to mouth
Gut is a loop through animal - mouth and anus both at top
Ectoprocta
Bryozans - moss animals
Small + found in colonies
asexual colony production
Excurrent chimneys - colony more effective at pulling in water
fouling - produce antifouling to stop fouling of themselves
Brachiopoda
Lamp shells
Solitary - marine - benthic
Similar to bivalves externally
Lophophorate differentiatates
Valve system is convergent with bi valves
Chaetognaths
Arrow worms
Marine
Planktonic
Streamlined
Bilateral symmetry
Transparent
fin rays - lateral and caudal fins
Cephalisation - simple eye mouth
Chordates
Notochord
Dorsal + hollow N cord
Gill slits
Unchordata
Ascidians
Thaliacea
Appendicularia
Cephalochordata
Ascidians
Sea squirt
Solitary of colonial
Tunic - bag surrounding animal
2 holes - oral siphon (entrance) - atrial siphon (exit)
Antifouling
Hermaphrodites
Larval stage has notochord
Thaliacea
Salps
palagic
individual - salpa
Colonial - pyrosoma
Pump water into pharynx to filter
Appenidcularia
Larvaceans
long tail - notochord
Large head structure
Mucus house - shed every 3 hours
Cephalochordata
Fish like
Lancelets - buried with protruding head
