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ZOOL 250 lectures 13-28 > 24 > Flashcards

24 Flashcards

1
Q

tagmata consisted of

A

head
thorax
pygidium

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2
Q

Trilobita

A

all extinct

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3
Q

Trilobita spp

A

25,000 all extinct

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4
Q

when were Trilobita present

A

Cambrian
wiped out in
end-Permian extinction event

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5
Q

Trilobita body plan

A

3 lobed body
1 pair antennae
1 pair compound eyes

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6
Q

what type of limbs

A

biramous

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7
Q

coxal endites of trilobita

A

spiny

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8
Q

what did the mouthpart of trilobita occupy

A

length of underbody

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9
Q

limbs varied in morphology, showing

A

most trilobites were detrivorous or predatory mfs

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10
Q

Crustaceans

A

non hexapod pancrustacea

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11
Q

Crustaceans spp

A

70000

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12
Q

Crustaceans habitat

A

mostly marine, many freshwater, some terrestrial

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13
Q

what phylum includes heaviest land invertebrate

A

Crustaceans

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14
Q

Crustaceans head

A

5 pairs of appendages
covered by a shield

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15
Q

compound eyes of Crustaceans

A

stalked (mobile) or sessile (flat on head)

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16
Q

what does the head-shield extend backwards as

A

carapace

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17
Q

feeding appendages

A

maxillipeds

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18
Q

walking legs

A

pereopods

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19
Q

sexes of crustaceans

A

separate sexes
reproduce sexually

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20
Q

exceptions sexes of crustaceans

A

hermaphroditic barnacles
cyclically parthenogenetic cladocerans

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21
Q

sexual reproduction

A

direct transfer of sperm
no free-spawning

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22
Q

modified limbs for
transferring sperm

A

gonopods

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23
Q

female crustaceans do what with eggs

A

frequently brood
their eggs

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24
Q

cleavage

A

intralecithal, spiral or radial

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25
Q

unique larval stage Crustaceans

A

nauplius

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26
Q

nauplius characteristics

A

three pairs of appendages
naupliar eye

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27
Q

Crustaceans egg characteristics

A

very yolky eggs

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28
Q

where is naupliar stage

A

passed inside
the eggshell

29
Q

what kind of development

A

direct development

30
Q

groups with free-living nauplii undergo what?

A

several other larval stages

31
Q

Remipedia

A

taxa of Crustaceans
sister to the Hexapoda

32
Q

tagmata Remipedia

A

head
and trunk

33
Q

segmentation Remipedia

A

homonomous segments

34
Q

Branchiopoda

A

taxa of custaceans
cyclic parthenogens

35
Q

what type of limbs Branchiopoda

A

phyllopodous

36
Q

limbs function Branchiopoda

A

swimming, filter-feeding and/or gas-exchange

37
Q

what is highly variable in Branchiopoda

A

extent of carapace highly variable

38
Q

Branchiopoda feeding

A

mostly filter-feeders

39
Q

Branchiopoda habitat

A

almost all are freshwater

40
Q

Malacostraca taxa of Crustaceans

A

Hoplocarida
Diplopoda
Isopods
Amphipoda
Thecostraca

41
Q

what class is important food for humans

A

Malacostraca

42
Q

carapace malacostraca

A

covers part or all of the thorax

43
Q

eyes Malacostraca

A

stalked or sessile eyes

44
Q

Hoplocarida

A

part of Malacostraca
mantis shrimp

45
Q

class with most complex eyes of any arthropod

A

hoplocarida

46
Q

whats used for prey capture and defense Hoplocarida

A

spearing or clubbing or snapping thoracic limbs
strike is powerful

47
Q

Hoplocarida where do they live

A

burrows- because small carapase

48
Q

Decapoda

A

part of Malacostraca

49
Q

how many pereopods decapoda

A

5 pairs of pereopods

50
Q

carapace Decapoda

A

carapace that encloses
leg bases and gills in a branchial
chamber

51
Q

Decapoda one or more pairs of pereopods are

A

claws evolved from normal walking
legs

52
Q

claws of Decapoda can be either

A

chelate or subchelate

53
Q

which apodeme is larger in fully chelate claw

A

larger and more musculated
closer apodeme

54
Q

abdomen in true’ crabs

A

greatly reduced

55
Q

Isopoda and Amphipoda characteristics

A

sessile eyes
lack a carapace
-fully terrestrial

56
Q

isopods vs Amphipoda

A

isopods dorso- ventrally flattened
amphipods: laterally flattened
-more variable leg morphology

57
Q

isopods and amphipods diversity
What are they

A

ecologically very diverse
-parasites of inverts

58
Q

parasitic species isopods and amphipods

A

-some completely lack
appendages
-have sac-like bodies

59
Q

terrestrial isopods

A

spiracle-trachea system

60
Q

Thecostraca Subclass Cirripedia

A

barnacles

61
Q

Cirripedia habitat

A

marine

62
Q

Cirripedia diet

A

sessile filter-feeders
some parasites

63
Q

filter-feeding Cirripedia

A

attached to
a substrate and enclosed in calcareous plates

64
Q

what were Cirripedia thought to be at first

A

molluscs until their larvae were
discovered

65
Q

do free living Cirripedia have stalks?

A

stalked or
unstalked

66
Q

Cirripedia sexes

A

hermaphroditic
very
long penises

67
Q

how does wave strength influence length of the feeding appendages

A

high wave force = short appendages

68
Q

parasitic barnacles

A

invade the bodies of other
crustaceans

ZOOL 250 lectures 13-28 (18 decks)

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