Arthropoda Chelicerata

1. Arthropoda Chelicerata
(Eight- legged Arthropods)
By Sydney Furth &
Brenna Banderob
5/19/09
pr. 3
Anoplodactylus evansi

(no common name)

2. Classification
•Subphylum breaks
into classes:
-Arachnida
(arachnids)
-Merostomata
(horseshoe crabs)
-Pycnogonida
(sea spiders)
Limulus
polyphemus
Horseshoe crab

3. Physical Features
•Exoskeleton
•Jointed limbs
•Segmented body
•Well developed
nervous system
•Eight legs
•No antennae
•No distinct head
Pseudopallene ambigua
Yellow Pycnogonid

4. Reproduction
•Sexual reproduction
•Produces eggs
Spider eggs

5. Feeding & Digestive System
•Digestive system
divided into 3 parts
-foregut
-midgut
-hindgut
•carnivores
•Sometimes eat other
arthropods

6. Circulatory System
•Heart= long thin tube
•Blood travels through
open passages
•Pale blood cells
- bluish
•If skin broken- blood
drains quickly

7. Respiratory System
•2 breathing organs
-tracheae
-small tubes
that carry air
through body
-book lungs
-cavities in the
abdomin
-air enters from
slits on either
side

8. environment
•land arthropods can
be found any where
on land
•Water for horseshoe
crabs & sea spiders
(obviously)
-fresh and salt
water
Spider web

9. Human Interactions
•Most people go
EEEKK at the sight of
8-legged arthropods
•Many spider bites can
cause problems, such
as death
•Scorpion & spider
venom is used to
make powerful
medicines & vaccines
A bite from
this caused
this
Loxosceles
reclusa
Brown recluse
spider

10. Unique Features
•Cold blooded
•Most spiders have
week vision
•Horseshoe crabs (who
live in water) come
ashore In large
numbers to lay eggs
•Horseshoe crabs swim
upside-down
Centruroides
vittatus
striped scorpion

11. Examples
•Tarantula movie

12. Works Cited
•Myers, P. 2001. Chelicerata. Animal Diversity
Web. May 19, 2009. <http://animaldiversity.
umnz.umich.edu/site/accounts/information
/Chelicerata.html>
•Holt, Rinehart, Winston. Animals. Austin, Texas:
Harcourt Classroom Education Co., 2002
•The Invertebrate Animals. May 20, 2009.
<http://users.rcn.com/jkimball.ma.ultran
et/BiologyPages/I/invertabrates.html>
•Eisen, Stan. Arthropoda chericerata. May 21, 09.
<http://www.cbu.edu/~seisen/Arthropoda/sld
014.htm>

13. •Spiders. May 21,09. <http://www.greensmith
s.com/spiders.html>
•Thompson, ken. The bumble bee. May 20, 09.
<http://www.bioteams.com/2006/04/2
1/the_social_networks.html>