Class Arachnida

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Class Arachnida
4 Orders - Spiders
Araneae Scorpions
Scorpionida Daddy Long
legs Opiliones Ticks
and Mites Arcarina
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Characterisitics of spiders ( Order Aaneae )
6 pairs of appendages 4 pairs of
walking legs 1 pr. of chelicera (
most anterior
head appendage) 1 pr. of pedipalps
no antennae no segmentation
head-chest fused to form cephalothorax
breathe with book lungs or trachea poison
glands with fangs ( on the chelicera )
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Tarantula molting
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Trapdoor spider
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Black and Yellow Argiope (Garden Spider )
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Brown recluse spider
Violin shape on dorsal side
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Female Black Widow Spider
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Order Scorpionidae - segementation prominent
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Order Opiliones - feed more as scavengers
Harvestmen Daddy Long legs
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Order Arcarina
Adult female deer tick
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Cutting proboscis in mouth of tick
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Female dog tick