i) Insect Isopoda

Reason for the name: The name Isopoda comes from the greek;

iso – same & poda – foot

The name Insecta comes from latin; insecta – divided/notched body

Isopods existing: Current number of species are 10,000.

Other names for Isopods: Pillbugs Sowbugs Woodlice Rolly Pollies Bicho Bola (in Spanish)

Types of IsopodsPhreatoicidea

Asellota Microcerberidae

Oniscidea

Sphaeromatidae

1. The insects/isopoda body is divided in three regions2. Abdomen consists of 5 free segments3. Each pleonite bears a pair of Biramous Pleopods4. Isopods have compound eyes, two pairs of antennae, and four

sets of jaws5. Sessile eyes (meaning they have eyes that don’t move) 6. The carapace is reduced to a cephalic shield7. They have two types of antennaes8. Has a heart thoraco-abdominal9. Principal gas exchange structures are pleopods

Characteristics

1st appeared on earth “Fossil Record”:

The first fossil record was found around 300 million years ago. In the Antarctic Marion island.

Life CycleReproduction: Isopods reproduce sexually. After mating the female carries her eggs in a special adapted

pouch. The eggs mature in approximately three weeks.

Egg, larvae, pupae, metamorphosis, adult

Digestive System Its a closed system (meaning inside) Alimentary canal (tube) running lengthwise through its body. The food enters through there mouth and goes out throughthere anus. They tend to eat plant and animal tissues.

Circulatory System Insects don't have veins or arteries (but they do have a circulatory system) Insect blood, are called hemolymph.

Respiratory System All insects have the same type of respiratory system. Air enters through body by cavities. The air is regulated by small muscles. It enters a tracheal trunk. And later diffusing throughout a complex, branching network of tracheal tubes.

Their sensory system is really simple,since their only sensory part are the antennae's. Sessile eyes (meaning they have eyes that don’t move)

Sensory System

Life Expectancy The life expectancy of an Isopoda is really short. Normally it will usually live for some months (depending also in its habitat)

BibliographyInformation: http://tolweb.org/Isopoda http://es.wikipedia.org/wiki/Isopoda http://www.ehow.com/about_5317360_isopod-life-cycle.html http://insects.about.com/od/morphology/ss/internalanatomy_4.htm http://insects.about.com/od/morphology/ss/internalanatomy_3.htmPictures: http://soilbugs.massey.ac.nz/isopoda.php http://www.google.es/search?q=isopoda&hl=es&rlz=1C1GGGE_esE

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