24

Question 1

tagmata consisted of

Answer 1

head
thorax
pygidium

Question 2

Trilobita

Answer 2

all extinct

Question 3

Trilobita spp

Answer 3

25,000 all extinct

Question 4

when were Trilobita present

Answer 4

Cambrian
wiped out in
end-Permian extinction event

Question 5

Trilobita body plan

Answer 5

3 lobed body
1 pair antennae
1 pair compound eyes

Question 6

what type of limbs

Answer 6

biramous

Question 7

coxal endites of trilobita

Answer 7

spiny

Question 8

what did the mouthpart of trilobita occupy

Answer 8

length of underbody

Question 9

limbs varied in morphology, showing

Answer 9

most trilobites were detrivorous or predatory mfs

Question 10

Crustaceans

Answer 10

non hexapod pancrustacea

Question 11

Crustaceans spp

Answer 11

70000

Question 12

Crustaceans habitat

Answer 12

mostly marine, many freshwater, some terrestrial

Question 13

what phylum includes heaviest land invertebrate

Answer 13

Crustaceans

Question 14

Crustaceans head

Answer 14

5 pairs of appendages
covered by a shield

Question 15

compound eyes of Crustaceans

Answer 15

stalked (mobile) or sessile (flat on head)

Question 16

what does the head-shield extend backwards as

Answer 16

carapace

Question 17

feeding appendages

Answer 17

maxillipeds

Question 18

walking legs

Answer 18

pereopods

Question 19

sexes of crustaceans

Answer 19

separate sexes
reproduce sexually

Question 20

exceptions sexes of crustaceans

Answer 20

hermaphroditic barnacles
cyclically parthenogenetic cladocerans

Question 21

sexual reproduction

Answer 21

direct transfer of sperm
no free-spawning

Question 22

modified limbs for
transferring sperm

Answer 22

gonopods

Question 23

female crustaceans do what with eggs

Answer 23

frequently brood
their eggs

Question 24

cleavage

Answer 24

intralecithal, spiral or radial

Question 25

unique larval stage Crustaceans

Answer 25

nauplius

Question 26

nauplius characteristics

Answer 26

three pairs of appendages naupliar eye

Question 27

Crustaceans egg characteristics

Answer 27

very yolky eggs

Question 28

where is naupliar stage

Answer 28

passed inside the eggshell

Question 29

what kind of development

Answer 29

direct development

Question 30

groups with free-living nauplii undergo what?

Answer 30

several other larval stages

Question 31

Remipedia

Answer 31

taxa of Crustaceans sister to the Hexapoda

Question 32

tagmata Remipedia

Answer 32

head and trunk

Question 33

segmentation Remipedia

Answer 33

homonomous segments

Question 34

Branchiopoda

Answer 34

taxa of custaceans cyclic parthenogens

Question 35

what type of limbs Branchiopoda

Answer 35

phyllopodous

Question 36

limbs function Branchiopoda

Answer 36

swimming, filter-feeding and/or gas-exchange

Question 37

what is highly variable in Branchiopoda

Answer 37

extent of carapace highly variable

Question 38

Branchiopoda feeding

Answer 38

mostly filter-feeders

Question 39

Branchiopoda habitat

Answer 39

almost all are freshwater

Question 40

Malacostraca taxa of Crustaceans

Answer 40

Hoplocarida Diplopoda Isopods Amphipoda Thecostraca

Question 41

what class is important food for humans

Answer 41

Malacostraca

Question 42

carapace malacostraca

Answer 42

covers part or all of the thorax

Question 43

eyes Malacostraca

Answer 43

stalked or sessile eyes

Question 44

Hoplocarida

Answer 44

part of Malacostraca mantis shrimp

Question 45

class with most complex eyes of any arthropod

Answer 45

hoplocarida

Question 46

whats used for prey capture and defense Hoplocarida

Answer 46

spearing or clubbing or snapping thoracic limbs strike is powerful

Question 47

Hoplocarida where do they live

Answer 47

burrows- because small carapase

Question 48

Decapoda

Answer 48

part of Malacostraca

Question 49

how many pereopods decapoda

Answer 49

5 pairs of pereopods

Question 50

carapace Decapoda

Answer 50

carapace that encloses leg bases and gills in a branchial chamber

Question 51

Decapoda one or more pairs of pereopods are

Answer 51

claws evolved from normal walking legs

Question 52

claws of Decapoda can be either

Answer 52

chelate or subchelate

Question 53

which apodeme is larger in fully chelate claw

Answer 53

larger and more musculated closer apodeme

Question 54

abdomen in true’ crabs

Answer 54

greatly reduced

Question 55

Isopoda and Amphipoda characteristics

Answer 55

sessile eyes lack a carapace -fully terrestrial

Question 56

isopods vs Amphipoda

Answer 56

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

Question 57

isopods and amphipods diversity What are they

Answer 57

ecologically very diverse -parasites of inverts

Question 58

parasitic species isopods and amphipods

Answer 58

-some completely lack appendages -have sac-like bodies

Question 59

terrestrial isopods

Answer 59

spiracle-trachea system

Question 60

Thecostraca Subclass Cirripedia

Answer 60

barnacles

Question 61

Cirripedia habitat

Answer 61

marine

Question 62

Cirripedia diet

Answer 62

sessile filter-feeders some parasites

Question 63

filter-feeding Cirripedia

Answer 63

attached to a substrate and enclosed in calcareous plates

Question 64

what were Cirripedia thought to be at first

Answer 64

molluscs until their larvae were discovered

Question 65

do free living Cirripedia have stalks?

Answer 65

stalked or unstalked

Question 66

Cirripedia sexes

Answer 66

hermaphroditic very long penises

Question 67

how does wave strength influence length of the feeding appendages

Answer 67

high wave force = short appendages

Question 68

parasitic barnacles

Answer 68

invade the bodies of other crustaceans