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ZOOL 250 lectures 13-28 > lecture 18 > Flashcards

lecture 18 Flashcards

1
Q

what is phylum lophophorata

A

the phylum w lophophores

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2
Q

what are the two extant lophophore phylum

A

bryozoa and branchiopoda

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3
Q

what is the synapomorphy of lophopgore

A

semi circular or coiled array of ciliated tentacles

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4
Q

what are some features shared by lophophorata
Bw larva digestive sys gut cavity lifestyle

A

-lophophore larva
-epistome
-complete digestive system
-eucoelomic cavities
-sessile or sedentary lifestyle

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5
Q

deuterostome vs protostome debate lophophorates
Cleavage
BlSfospors
Gut cavity

A

deut:
radial and indeterminate cleavage
the blastopore does not become mouth, and there is a multi part eucoelom
prot:
molecular data places them

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6
Q

phylum bryozoa

A

moss animals

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7
Q

bryozoa how many spp

A

6300

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8
Q

roles in ecosystem bryozoa

A

reef building

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9
Q

what are some characteristics of byozoa
Do they have polyps??

A

colonial
-have zooids rather than polyps

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10
Q

features of zooids
What is skele made of?

A

exoskeleton made of either calcium carbonate , gelatinous, or chitin
-lack respiratory organs

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11
Q

what do zooids lack?

A

Resp organs, nephridia, heart and blood vessels

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12
Q

how are bryozoan individuals connected

A

by tissue strands called funiculi

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13
Q

what does funiculi do

A

transports nutrients among zooids

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14
Q

what are the different types of zooids

A

feeding zooid- most common
defensive zooid
vibracula
gonozooid

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15
Q

what are defensive zooids called

A

avicularia

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16
Q

what are vibrancula

A

zooids that form long movable brisle.
vibrancula around edges are leg like, for walking

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17
Q

what is function of gonozoids

A

egg chamber

18
Q

diet of bryozoa

A

most are suspen feeders

19
Q

how do bryozoa feed

A

cilia on lophophore send particles towards mouth
larger particles flicked towards mouth w tentacles

20
Q

what is the bryozoa gut like

A

U shaped gut

21
Q

different sexes byozoa

A

colont level is hermaphroditic

22
Q

how does sexual reproduction occur in bryozoa

A

sperm released and eggs are brooded

23
Q

how is a new colony started

A

larva settle and transform into ancestrula

24
Q

what do bryozoa larva not look like

A

trochophore larvae

25
Q

what happens in bryozoa asexual reproduction
2) what is unique to freshwater species

A

budding of new zooids

2) statoblasts are produced

26
Q

what are statoblasts

A

they are resistant stages of growth, like gemmules. survive freezing and desiccation and can be transported

27
Q

what are the economic impacts of bryozoa

A

remove pariculate matter from water and reef build.
they are also fouling organisms

28
Q

why are bryozoans important to paracites

A

they are hosts of myxozoans that parasitize fish

29
Q

Phylum branchiopoda

A

lamp shells

30
Q

branchiopoda how many spp

A

440

31
Q

when were branchiopods diverse and commong

A

in the past

32
Q

how do branchiopoda shells differ from bivalves

A

enclosed by two calcified shells, but have ventral and dorsal size, and are unequal in size

33
Q

how do branchiopoda attach to substrate

A

using stalk called pedicle

34
Q

do branchiopoda have lophophores

A

yes, and they can be complexly coiled

35
Q

where do branchiopoda keep lophophore

A

inside shell

36
Q

why called lampshell?

A

because liek old oil lamps

37
Q

branchoipoda gut

A

blind- no anal opening

38
Q

branchiopoda sexes

A

seperate- most species release eggs and sperm

39
Q

what do some branchiopoda larva look like?

A

trochophore

40
Q

how doe branchiopoda feed

A

send small paricles to mouth

ZOOL 250 lectures 13-28 (18 decks)

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