View
10
Download
0
Category
Preview:
Citation preview
LOPHOPHORATES AND SMALLER ECDYSOZOA
CHAPTER 17-19
CYCLIOPHORA
PHYLUM CYCLIOPHORA▸ discovered in 1995 ▸ acoelomate ▸ life cycle with sexual and asexual phases
CYCLIOPHORA
▸ complex life cycle ▸ internal and external
budding ▸ asexual and sexual ▸ sessile and motile
Obs
t, F
unch
(20
03)
CYCLIOPHORA
▸ complex life cycle ▸ internal and external
budding ▸ asexual and sexual ▸ sessile and motile
internal bud
malemale
prometheus larva
prometheus larva
buccal funnel
prometheus larva
Obs
t, F
unch
, Kri
sten
sen
(200
5)
CYCLIOPHORA
▸ complex life cycle ▸ internal and external
budding ▸ asexual and sexual ▸ sessile and motile
Obs
t, F
unch
, Kri
sten
sen
(200
5)
stalk
adhesive disc
m1m2
chordoid larva
anus
feeding stage
prometheus larva
BRYOZOANS
▸ Phylum Entoprocta ▸ pseudocoelomate ▸ complete GI ▸ mostly marine ▸ protonephridia ▸ ciliary feeders -- tentacles
with cilia ▸ Phylum Ectoprocta
▸ eucoelomate ▸ complete GI ▸ bryozoans (moss animals) ▸ mostly sessile, marine or
freshwater ▸ ciliary feeders -- lophophore
LOPHOTROCHOZOA
▸ Phylum Brachiopoda ▸ feed with lophophore arms ▸ attached to substrate by
pedicel ▸ bivalve
Lophophore
poriferaeumetazoa
bilateria
cnidaria ctenophora
deuterostomiaprotostomia
lophotrochozoa
ecdysozoahemichordata echinodermata
chordata
gnathifera
gastrotricha
platyhelminthes nemerteagnathostomulida
rotifera acanthocephala
entoprocta
ectoprocta
mollusca
annelida
nematanematomorpha
tardigrada
arthropoda
onychophora
panarthropoda
acoela
root
ECDYSOZOA
▸ Phylum Priapulida ▸ body composed of introvert, trunk,
caudal appendages ▸ chitinous cuticle
▸ specialized urogenital organs (with solenocytes) - dioecious
▸ scalids surround mouth
pharynx
mouth
introvert
retractor muscles
intestine
urogenital organ
caudal appendage
ECDYSOZOA
▸ Phylum Kinorhyncha ▸ pseudocoelomate ▸ scalids ▸ dioecious
ECDYSOZOA
▸ phylum loricifera ▸ sediment living ▸ up to 3000m deep in
ocean ▸ anaerobic -
hydrogenosomes ▸ scalids similar to
kinorhyncha ▸ Higgins larva
Higgins larva
mouth
scalids
testis
anus
lorica
ECDYSOZOA
▸ Phylogeny and Adaptive Radiation
Recommended