Transcript Arthropoda &Echinodermata

Arthropoda &Echinodermata
By Carla T. & Tiashi M.
Arthropoda
4 Basic groups
in the
Arthropods
Eukaryotes
*Myriapods
*Chelicerates
*Hexapods
*Crustaceans
Usually three
body
segments:
Head, Thorax,
Abdomen
Most of these molt if spiders don’t get out
of their molt they run the risk of dying.
Tarantula
 Bilateral
 Chelicerates
 Divided into two main parts;
Abdomen and Cephalothorax
 A tarantula bite may cause a
wound but is no threat to a
human's life.
 They have four pairs of legs no
antennae, no mandibles.

Monarch Butterfly
 Insecta
 Lepidoptera
 Danaidae
 Danaus
Cotinus Texana
 Insecta
 Caleoptera
 They feed on fig fruit


Lobster

Crustacea

Decapotada

Nephropidae

Homarus

Americanus

Lobsters are invertebrates and have a tough
exoskeleton.

Enchinodermata
Eukaryotic cells
Radial symmetry except Sea Cucumbers
Possess no eyes, brain or heart
Have the ability to regenerate missing body parts
Fertilizes externally
Asexual or sexual reproduction
Humans use echninoderms as food or for medicine
Some can be toxic
5-part symmetry
The Common Starfish (Sea
Star)
•Asteria rubens
•Carnivorous
•Eats clams, sponges , bryozoans, and asdicians
•Lives on coral reefs, rocks or sand
•Usually have 5 arms
•Can reproduce asexually or sexually (usually fertilize
externally)
•
Sea Cucumbers
Holothuria pardalis
Bilateral
Does not possess arms but does have a 5-part
symmetry
Eats decaying matter
Reproduce sexually but fertilize externally
Serves as a host for crabs, shrimp or worms (symbiotic
relationships)
Sea Urchins
●
●
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Strongylocentrotus
purpuratus (Purple
Sea Urchin)
5 sided radial symmetry
Have spines that are 1 cm
coming out of its body
Feed on kelp, algae,
sponges, dead or
decaying matter and
mussels
●
Fertilize externally
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Possess toxin
Common Brittle Star
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Ophiothrix fragils (Common Brittle Star)
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Radial symmetry
●
Possess 5 snake-like arms that connect at the base
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Posses a hard endoskeleton
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Life span is 11-20 years
●
Have only one opening and no anus
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Have diet of decaying matter and plankton and some
small animals
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Asexual reproduction
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Separate genders
●
Citation
http://www.starfish.ch/reef/echinoderms.html
http://www.ehow.com/info_8237938_sea-urchin-astropyga-radiata-classification.html
http://www.nhptv.org/natureworks/monarch.htm
http://www.newworldencyclopedia.org/entry/Lobster
http://people.eku.edu/sumithrans/Zoo/ARTHRONOTES.html
http://www.parl.ns.ca/lobster/overview.htm
http://www.enchantedlearning.com/subjects/i
nvertebrates/echinoderm/Purpleseaurchin.sht
ml
http://www.peteducation.com/article.cfm?
c=16+2158+2218&aid=3146
Raven and Johnson Biology book