NEMATODES

Andrea McQuillan, Carlee MacNeill, Hannah Gillam & Luke Coxhead

InvertebratesVery diverseParasitic or free living20 000 classified speciesMore known parasitic species

INTRODUCTION

Kingdom: Anamalia

Phylum: Nematoda

Class:AdenophoreaSecernentea

CLASSIFICATION

Little research of evolutionFossils dating back to 500 million years agoRelated to arthropods and priapulidsEvolved from unicellular organisms with no

symmetry to radially symmetric organisms and then to bilaterally symmetric organisms

They have hardly evolved over the past few millions of years

EVOLUTION

Size: Most are less than 1 mm to 5 cm in lengthCan measure over 1 meter

Cylindrical, bilateral symmetry, unsegmented

EpidermisTough but flexible cuticle

CHARACTERISTICS

Longitudinal musclesPrimitive body cavitySimple nervous system

CHARACTERISTICS

Variety of patterns that can all be related to one pattern.

2 phases: parasitic and pre-parasiticReproduction

In most species it takes place in the hostMajority reach adulthood and start

mating in 2-3 monthsCan live up to two years

LIFE CYCLE

Stomodeum

Intestine

Excretory System

http://www.youtube.com/watch?v=fI33nRmK70s

DIGESTIVE SYSTEM

Most significant source of consumers

Can lay up to 200 000 eggs a day

In a handful of dirt you can find thousands of nematodes

Parasitic Nematodes can cause a variety of diseases

INTERESTING FACTS!

  "Ne matode Ge nome E v o lu t i on* . " Ne mat ode Ge nome Ev o lu t i on . N .p . , n . d . We b . 25 Mar. 2014 . <h t t p : / / w w w.w ormbook .o rg / chap te r s / w w w _ ge nome v o l / ge nome v o l . h tm l> .

  "Ne matode s . " Ne mat ode s . N .p . , n . d . We b . 25 Mar. 2014 .

<h t t p : / / w w w.b i ocon t ro l . e n tomo logy. co rne l l . e du / pa t hoge ns / ne mat ode s .h tm l> .   " I n t roduc t i on t o t he Ne mat oda . " I n t roduc t i on t o t he Ne matoda . N .p . , n . d . We b . 25 Mar. 2014 .

<h t t p : / / w w w.ucmp .be rke l e y.e du / phy l a / e cdy sozoa / ne matoda .h tm l> .   "P l ace n tone ma G igan t i s s imum. " P l ace n tone ma G i gan t i s s imum . N .p . , n . d . We b . 25 Mar. 2014 .

<h t t p : / / w w w.sp r i nge r re f e re nce . com/ docs / h tm l / chap te rdb id / 142533 .h tm l> .   "E v o lu t i on o f Ne matode D e v e l opme nt . " E v o lu t i on o f Ne matode De v e lopme nt . N .p . , n . d . We b . 26 Mar.

2014 . <h t tp : / / w w w.sc i e nce d i re c t . com/ sc i e nce / a r t i c l e / p i i / S0959437X00001106>.   "The Ev o l u t i ona ry H i s t o ry o f Ne matode s . " Br i l l . N .p . , n . d . We b . 26 Mar. 2014 .

<h t t p : / / w w w.b r i l l . com/ e v o lu t i ona ry- h i s t o ry - ne matode s> .   "NE MATODE . " NEMATODE . N .p . , n . d . We b . 01 Ap r. 2014 .

<h t t p : / / w w w. facu l t y.pnc .e du / j camp / pa ras i t / ne matode .h tm l>   "The P hy l um Ne mat oda . " The Ne matode s ( P hy lum Ne mat oda ) . N .p . , n . d . We b . 31 Mar. 2014 .

<h t t p : / / w w w.e a r th l i f e . ne t / i nv e r t s / ne mat oda .h tm l> .   "NE MATODE . " NEMATODE . N .p . , n . d . We b . 01 Ap r. 2014 .

<h t t p : / / w w w. facu l t y.pnc .e du / j camp / pa ras i t / ne matode .h tm l>   "Ne matode Foss i l s Ne matoda . " Ne mat ode Foss i l s Ne matoda . N .p . , n . d . We b . 01 Ap r. 2014 .

<h t t p : / / w w w. foss i lmuse um.ne t / f os s i l s / Ne matoda - f oss i l s . h tm>.

SOURCES