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Flashcards in ecdysozoa Deck (22):
1

what is an ecdysozoan

type of prostomes
animals that shed their cuticle
are bilaterally symmetrical

2

ecdysozoa clades

arthropoda
tardigrada
onychophora
cephalorhycha
nematodoa
nematomorpha
myriapods
chelicarates
crustatceans

3

ecdysis

moulting of cuticle for growth like in scorpions and priapulid worms

4

introvertan worms

priapulida (penis worm)
nematodoa (round worm)
loricifera and kinorhycha

5

what do all introvertan worms share

spiny introvert or probosics
tyblically have spines used for food

adult loricifera and larval priapulids share tunids

6

segmentation

repeated units of construction along anteroposterior axis

mechanism conserved in arthopods, vertebrates and annelids

7

homology of segmentation found in

annelids arthopods and chordates;

2 genes inolved in segmentation of all arthopods and annelids; same genes in vertebrae

hints of segmentation in SOME itnroverted worms in muscular and bone reptition

8

panarthopods

tardigrades and oncyhophorans (segementation and legs present)

9

tardigrades

waterbears
common
live in moss
segmentation and legs

10

oncyhophoans

velvet worms
sgemented bodies

limbs

less ridgid cuticle

11

arthopod classes

arachnids
myriapods
insects
chelicerates
orcyhophorans
tardigraes
crustaceans

12

crustacean examples

malacrustacean
maxillopod
branchiopods

13

arachnids

spiers scorpions tricks mites etc

14

chelicerates

horseshoe crabs sea spiders

15

common to arcahnids and chelicerates

8 walking legs
two pait of mouth parts
no preoral appendage

16

myriapods

centipedes milipedes

17

insects

head thorax abdomen structure

18

tagmatization

segment specialisation; differs in different arthopods

19

malacostraceans

crabs lobsters crayfish

20

maxilopod crustacieans

barnacles

21

relationsip of arthopods and crustacesans

insects are terrestial crustraceans and mitchondrial gene changes supports their close relationship

22

features of arthopods

segmentation
tagmatizaion
jointed legs