22 panarthropod- lobopod phyla

Question 1

what is panarthropoda part of

Answer 1

ecdysozoa

Question 2

what does being in ecdysozoa mean

Answer 2

mooult entire non living cuticle and also lack primary larva

Question 3

what are the extant phyla of panarthropoda

Answer 3

tardigrada
onychophora
arthropoda

Question 4

what percent of animals does panarthropoda make up

Answer 4

more than 80

Question 5

how do panarthropoda differ from other ecdysozoans

Answer 5

segmented bodies w pairs of libs

Question 6

what characterizes limbs of panarthropoda

Answer 6

they can be jointed or they can be lobopods

Question 7

lobopods

Answer 7

fleshy unjointed outpocketings

Question 8

what was envisioned as transitional taxon that joined annelids and arthropods

Answer 8

Onychophora

Question 9

is Onychophora actually the transitional taxon b/w annelids and arthropods?

Answer 9

no, just close relationship b/w arthropoda and Onychophora

Question 10

tardigrada

Answer 10

water bears

Question 11

tardigrada how many spp

Answer 11

1200

Question 12

tardigrada habitat

Answer 12

terrestrial in wet soil and moss

Question 13

what describes tardigrada head

Answer 13

no antennae

Question 14

what describes tardigrada body and limbs

Answer 14

four body segments w paired lobopod limbs that have distinc claws

Question 15

how does tardigrada move

Answer 15

slow stepping motion

Question 16

what systems do tardigrada lack

Answer 16

circ and excretory system

Question 17

tardigrada coelom

Answer 17

small eucoelom that surrounds gonals
majority of euceolem haemocoel

Question 18

what muscles do tardigrada have

Answer 18

lack circular muscles but have muscles bands that attach to cuticle

Question 19

tardigrada nervous system

Answer 19

dorsal brain w circumoesophageal connectives and pair of ventral nerve chords

Question 20

what are tardigrada eyespots

Answer 20

non image forming inside the brain

Question 21

tardigrada feeding

Answer 21

feed on bacteria, algae, decaying plant matter, small invertebrates via sucking

Question 22

what characterizes tardigrada pharynxq

Answer 22

muscular b/c sucking

Question 23

tardigrada sexes

Answer 23

parthenogenic with few hermaphroditic

Question 24

4 ways sperm is transfered in tardigrada w diff sexes

Answer 24

1) into females genital opening
2) hypodermic insemination- pierces cuticle and deposit sperm
3) male stimulates female to oviposit, then smears sperm over eggs
4)male copulates with moulted cuticle and female oviposits in old cuticle

Question 25

what type of fertil;ization tardigrada

Answer 25

external or internal

Question 26

development tardigrada

Answer 26

direct

Question 27

tardigrada howq do they grow

Answer 27

eutely

Question 28

tardigrada eggs

Answer 28

highly resistant

Question 29

why is lifespan for tardigrada so long

Answer 29

they are masters of cryptobiosis

Question 30

cryptobiosis

Answer 30

state where mf alive but no metabolism

Question 31

what is a form of cryoptobiosis used by tardigrada

Answer 31

anhydrobiosis

Question 32

what is anhydrobiosis

Answer 32

where all water is eventually lost from animal

Question 33

what are tardigrada resistant to

Answer 33

outerspace, manny environmental stresses and absence of water

Question 34

phylum onychophora

Answer 34

velvet worms

Question 35

onychophora spp

Answer 35

200

Question 36

onychophora habitat

Answer 36

only entirely terrestrial phylum of animals

Question 37

head of onychophora

Answer 37

one pair of antennae

Question 38

body of onychophora

Answer 38

homonomous segment with 1 pair of lobopod limbs tipped w claws

Question 39

what types of muscles onychophora

Answer 39

circular, longitudinal, dorso ventral, also have metanephridisa

Question 40

coelom of onychophora

Answer 40

restricted to pockets around gonalds and haemocoel

Question 41

circ system onychophora

Answer 41

open but they have heart

Question 42

onychophora nervous system

Answer 42

dorsal brain and paired ventral nerve chords

Question 43

eyes onychophora

Answer 43

have very small eyes

Question 44

how do onychophora exchange gasses

Answer 44

tracheal system with spiracles or stigmata

Question 45

stigmata or spiracles

Answer 45

opening in side of body

Question 46

what do stigmata lead to in tracheal system

Answer 46

tracheae(large tubes)

Question 47

onychophora feeding

Answer 47

predators

Question 48

how do onychophora capture food

Answer 48

glue glands that spray glue

Question 49

development onychophora What are young worm born w

Answer 49

direct young worms born w full num howsegments

Question 50

how is copulation done

Answer 50

hypodermic insemination

Question 51

different types of reproduction female onychophora

Answer 51

oviparity ovoviviparity viviparity

Question 52

oviparity

Answer 52

lay eggs outside body

Question 53

ovoviviparity

Answer 53

eggs retained in mother until hatch or right before hatch

Question 54

viviparity

Answer 54

no egg but young develop inside mommy

Question 55

onychophora cleavage

Answer 55

neither spiral or radial have intralecithal cleavage

Question 56

what happens in viviparous spp

Answer 56

yolkless egg attaches to wall and nourishes via placental connection