Trilobita 01

disparidade e morfologia
Myriapoda
Trilobita Chelicerata
Insecta
Crustacea
Sanctacaris
C
segmentação
PC
simetria bilateral
apêndices
articulados
?
©2008
Características
herdadas
exosqueleto
apêndices numerosos
S
M
ancestral
comum
C
1 - http://www.discoverlife.org/nh/other.html; 2 - http://biology.ucok.edu/AnimalBiology/Arthropoda/Trilobita/Trilobites.html; 3 - http://www.rach.sill.amedd.army.mil/Departments/PREVMED/
Environmental_Health/field/spiders/images/Turantula%20Spider.jpg; 4 - http://www.commersen.se/ungafakta/varldshaven/urhaven/ryggrlosa/sanctacaris.html; 5 - http://www.insectsofalberta.
com/images/2004-08-20%20035_greenbottle_fly.jpg; 6 - http://7art-screensavers.com/screenshots/sea-creatures/land-crab.jpg; 7 -http://mainelobstershop.com/lobster.jpg
Trilobita
PC
Ocorrem em fácies marinhas
fóssil de
crinóide
Escudo dorsal
mineralizado
extinctos!
©2006
Biostratigraficamente úteis
S
M
N
P
K
J
T
P
C
D
S
O
C
registo fóssil
C
Para saber mais: http://evolution.berkeley.edu/evolibrary/article/_0_0/arthropodstory
Arthropoda
Tinham olhos!
olhos complexos
surgem
carapaça cefálica
1 - http://www.humboldt.edu/~natmus/Case_indexes/Case_jpgs/Trilobite.web/546.jpg; 2 - http://digsfossils.com/fossils/pics/trilobites/russia-trilobite004d.jpeg;
3 - http://www.uky.edu/OtherOrgs/KPS/pages/taylorsville.html; 4 - http://www.nmnh.si.edu/paleo/shale/polen.htm; 5 - http://www.trilobites.info/trilovent.htm