lophotrochozoa Flashcards
what is a lophotrochozoa
type of prostomes
what two main groups of lophotrochozoa are there
spiralians and lophophorates
all phyla of lophotrochozoa
platyhelminth
rotifera
bryozoa
brachiopoda
phoronida
nemertea
annelida
mollusca
lopphore structures
covered with cillia which trap particles int he water and transprot marticles to mout to filter feed
trophophore larvae
larvae stage with ring of cilia (spiralia)
- sgemented worms, coelmicand spiral cleavage
found in molluscs and annelids for example
examples of species with trophophore larvae
earthworms
leeches
bristleworms
myzostomids
echuiran
borelia vindis; larvae decides gender by where it lands
male; paraistic bag of testicles
adult isnt segmented; only in embryonic developed looks like trochophore larvae
sipuncula
phascalian stroma
weird looking trochophore larvae
similar genes to annelids
key features of mollsucs
coelmic cavaity
spiral cleavage
trophphore larvae
radula (rasping tongue) mantel shell gills muscular foot
molluscs groups
bivalvia
gastropods
cephalopods
polyplacophora
aplacapophyla and monoplacophora (ancient)
bivalvia
type of mollusc: oysters and mussles
gastropods
type of mollusc: slugs and snails
cephalopods
type of mollusc: squid, octopus and cuttlefish
polyplacophora
type of mollusc: chiton
aplacophora
type of mollusc: (ancient) caudoforesta
monoplacophora
type of mollusc: neopillana(ancient)
nemertea characteristics
ghoslike structure
no cavaity
adults grow out of larvae; first meal is outer layer
many have sharp spikes
example of nemertea
flatworms and unsgemmented worms
polyclad flatworms
may have a trophopre larvae
tuverlleian flatworms
nemertea; polyclad turbellena
maritegella
t
parastic flatworsm
cestode; tape worm
trematatod- liver fluke
other lophotrochozoan examples
phornids
braciopods (lamp shells)
bryozoan (moss animal)
connections between lophophorate braciopods and trochophore annelids
- early developends suggest tjey might be both dervied from a trochopphore larvae
rotifers
some groups are asexual and believed to have derived from a trochophore
haikierilids
brachiopods and annelid ancestor 500 mya possibly
obsrure lophotgrochozan examples
rotifers
gnathostomata
microchanthozoa
gnathifera
had jaws
may constitute group in lophophorates
have belly with hair
what phyla have trochophore larvae
annelids
molluscs
sipunalids
maybe nemerteans and plathelminth
