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Copy of Spiders, Myths & Arachnophobia

A presentation on Spiders for the general public.
by

Michael Lawliss

on 29 May 2013

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Transcript of Copy of Spiders, Myths & Arachnophobia

Anatomy Lore & Legend Myths Basic Groups The Way they walk Molting Family Pictures: eggs Welcome!
This workshop was designed to help people learn the true nature of spiders and to relieve some anxiety and fear by the means of education and familiarity. SPIDERS More links for ANATOMY:
http://www.earthlife.net/chelicerata/s-anatomy.htmlhttp://giantspiders.com/anatomy.html Tangleweb spiders (Theridiidae)
- widows, house spiders Orb web spiders (Araneidae)
- Garden spiders, typically big round webs Other forms of webs - Sydney Funnel-web, Hobo Spider and Grass Spider Hunting spiders - Brown Recluse, Huntsman, Jumping Spiders, tarantulas, Wolf and Sac Spiders Spiders who ambush their prey - Trap-door Spiders, Crab Spiders and Bolas Spiders When spiders walk their legs extend mostly due to hydraulic pressure this causes that unique movement we associate with spiders. It also explains the reason a spider’s legs are almost always curled underneath when they die.
Some spiders have internal pressures that are equal to human's average blood pressure. Only one muscle present to retract each joint, none to extend them. In Humans: all joints have
pairs of opposing muscles. Spiders have had a place in the Lore and Legends of ancient peoples for thousands of years Arachne a young girl and talented weaver, whose conceit angered the gods, especially Athena - a master weaver & the patron god of such activities.
So a contest was called... Athena's tapestry was incredible. However, Arachne’s piece was not only perfect, the image was an insult to Athena herself. Beyond angered, Athena shredded the mortal’s work.
In response to the defilement of her work, Arachne hung herself. Whether as punishment or pity Athena didn’t let the girl die but rather turned her into a spider. Where she forever hangs from a thread and weaves eternal. The Choctaw ( Native Americans) believe it was a spider who brought fire to their people. After:
the Opossum failed & burned all the hair off his tail
the Buzzard failed & burned all the feathers off his head
the Crow failed & the smoke and soot made his feathers black and ruined his once melodic voice
the Spider made a clay pot to carry the ember
They still remember Grandmother Spider, Firebringer with drawings of a spider two pairs of legs up two pairs down and a flame on her back. The Apache ( Native Americans) believe it was a tarantula that helped the Creator stretch the Earth into its current size. By attaching ‘ropes’/silk to each corner and pulling them. Will you walk into my parlor?"
said the Spider to the Fly, 
'Tis the prettiest little parlor
that ever you did spy; 
The way into my parlor
is up a winding stair,
And I've a many curious things
to show when you are there.
"Oh no, no," said the little Fly,
"to ask me is in vain, 
For who goes up your winding stair
can ne'er come down again."…

The Spider and the Fly
British Poet- Mary Howitt INSECT:
3 body parts
2 compound eyes
2 antennae
4 wings (or 2 or none)
3 pairs legs
abdomen segmented SPIDER:
2 body parts
8 simple eyes
no antennae
no wings
4 pairs of legs
abdomen un-segmented* Myth 1 - Spiders are insects MYTH 2 - TARANTULAS KILL HUMANS
1 – This is false; there has been no documented cases of any tarantula killing a human from its venom. The venom is actually less hazardous than bee/hornet venom, also Tarantula venom is less likely to cause an allergic reaction even in bee sensitive people
2 – This myth also leads to another:Pet Stores will remove the Fangs and/or Venom from a pet tarantula. ( this would kill the Spider ) MYTH 3: Spiders can be positively
identified by their markings. These spiders are not in the same genus These spiders are in the same genus, Pterinochilus MYTH 4: Dr's can I.D. and give an antivenom-
Entomology and Arachnology are not part of the typical Medical School Student’s course of study.
Positively identifying a spider is a difficult task even for an arachnologist
Though most areas have a limited number of spiders to choose from, often spiders hitch rides on produce and other goods shipped from foreign places Available Antivenoms
Funnel web spider antivenom: Sydney funnel-web spider, Australia
Soro antiaracnidico: Brazilian wandering spider, Brazil
Soro antiloxoscelico: Recluse spider, Brazil
Suero antiloxoscelico: Chilean recluse, Peru
Aracmyn: All species of Loxosceles and Latrodectus, Mexico
Redback spider antivenom: Red-back spider, Australia
Black widow antivenin: Black widow spider, USA
SAIMR Spider antivenom: Button spider, South Africa
Anti Latrodectus antivenom: Black widow spider, Argentina Myth - 5: The female eats the male after mating.
This is the exception and not the rule.
Some species’ females are more aggressive toward the males after mating.
Some are even aggressive towards males prior to mating. Myth - 6: “Daddy Long Legs” have the most dangerous venom but can’t bite you. Daddy-long-legs (Harvestmen) are not actually spiders, and they do not have venom glands.
They belong to the Order "Opiliones" Family Pictures: kids Molting (ecdysis) Photos: Austin Spears He only thinks he can kill a human Before Family Pictures: adults “The Biology of Spiders” Sec Ed; Rainer F. Foelix; 1996; Oxford Thieme
“The Tarantula Keeper’s Guide” Sec. Ed; Stanley and Marguerite Schultz;1998; Barron’s
“Spiders; Biology, Ecology, Natural History and Behavior” Fred Punzo; 2007 Brill
http://www.absoluteastronomy.com/encyclopedia/s/sp/spider.htm
http://www.washington.edu/burkemuseum/spidermyth/
Photo Credits: R. Millott, R. May, M. Lawliss, M. Gamache of Tarantula Canada
http://www.atshq.org/articles/Digestion.pdf
http://en.wikipedia.org/wiki/Antivenom
http://spiders.ucr.edu/index.html
http://www.arachnoboards.com and after. notice the
familiar names
of the leg parts canine danger Two Reasons
for concern. or Prosoma or Opisthosoma Another freshly molted Spider.
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