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7/23/2019 The Golden Orb Weaver Through The Ages
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Meghan Fitzgerald
UW Zoology
The Golden Orb
Weaver (Nephila)through the ages:
from medieval tortureto space travel
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• Nephila facts and details
• Nephila’s awesome adventures
• Tiny bit about what I do• Completely non-related, but fantastic
spider thing
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The Orb-Weavers
~ 42,000 species of Araneae described
~ 3000 orb-weavers
• (estimated to be apx 10,000 total)• 25% of world-wide spider diversity
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Orb Weavers
Phonognatha graeffei
Leaf curling spider
Cyclosa spp
Trash-line spider
Argiope argentata
Silver Garden Spider
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Oldest known genera of
orb-weaving spiders (maybe)!
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The Golden Orb Weavers
(Nephila)
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• Sexually dimorphic
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Sexually dimorphic
Sometimes live in groups
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• Sexually dimorphic
• Sometimes live in groups
• Will eat pretty much anything
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• Sexually dimorphic
• Sometimes live in groups
• Will eat pretty much anything
• Large, yellow web
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Nephila silk
• Tensile strength
– Comparable to steel per unit volume
– Greater than steel per unit weight• Kevlar is three times harder to break
– Nephila silk is five times more elastic
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• 18th century France - Camboué
– Couldn’t produce in reasonable quantity
– Few produced pieces disappeared
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Sweet cape
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• Randy Lewis (U of Mt) created a line of
transgenic goats – Goats milk with the protein found in spider’s
dragline silk
• 30 goats currently in a small farm in Utah
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Spiders in Space!
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In 2011 two Nephila clavipes, Gladys and
Esmeralda, lived on the International Space
Station for 45 days
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Which brings us to 2011
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Spiders in a house
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Spiders
in a box
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Spiders on a String
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