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Jake Reicker, Jacqueline Bradbury, Brandon Nilsen, Josh Cullen Arachnida

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Introduction Phylum: Arthropoda Subphylum: Chelicerata Class: Arachnida Number of Known Families: 648 Order: Acari, Amblypygi, Araneae, Haptopoda, Opiliones, Palpigradi, Phalangiotarbida, Pseudoscorpions, Ricinulei, Schizomida, Scorpiones, Solifugae, Trigonotarbida and Thelyphonida.

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Distinguishing Physical Traits 8 Legs in Adult Life Stage Breath by Book Lungs Do not possess jaws, antennae or wings.

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Chelicerae & Pedipalps Bodies are in two parts Distinguishing Physical Traits

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Behavioural Traits Cannibalism Males give gifts and dance to attract mates Solitary lifestyle Largely inactive, opportunistic eaters

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Peacock spider mating dance

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Environment Scorpions Found on all continents (bar Antarctica), though not natively to all. Found in every terrestrial habitat with the exception of boreal habitats. Spiders Found on every continent Almost every terrestrial habitat

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Environment Ticks & mites Terrestrial & aquatic Widely distributed Warm, humid climates Mites in the Antarctic Two requirements must be met for an ecosystem to support ticks High host population High humidity Common microclimate features: sandy soil; hardwood trees; rivers; and the presence of deer.

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Evolution Arachnida evolved from the group Chelicerata Complex relationship between orders Four main categories Stethostomata, Haplocnemata, Acaromorpha & Pantetrapulmonata Scorpions among first land based animals with other species of arachnids appearing later

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Evolutionary Advantages Arachnids are an extremely robust species due to their evolution Exoskeleton is strong, lightweight and water proof Ease of movement Sensory organs

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Life cycle/reproduction

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Fun Facts Spiders produce seven kinds of silk - Ranging from sticky silk to trap prey, to super-strong thread for support Scorpions are among the only animals known to survive nuclear exposure and they also glow under UV light Arachnida is a part of the biggest and most diverse phylum; Arthropoda. It consists of ~1.1mil species recorded.

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Sources Dunlop, Jason A. "Fossil Focus: Arachnida." www.palaeontologyonline.com. N.p., 1 Dec. 2011. Web. 01 Apr. 2014. Evans, Arthur V., Rosser W. Garrison, Neil Schlager, and Michael Hutchins. "Arachnida." Grzimeks' Animal Life Encyclopedia. Detroit: Thomson-Gale, 2004. 333-37. Print. Holmes, Thom. "The First Land Animals." March onto Land: The Silurian Period to the Middle Triassic Epoch. New York: Chelsea House, 2008. 74-78. Google Books. Google. Web. Underwood, D.L.A. "Overview of the Class Arachnida." General Entomology. Longbeach. 27 Mar. 2014. Reading.

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Clarkson, Jesse. "Evolution and paleontology." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 8 Mar. 2014.. "Arachnid." Wikipedia. Wikimedia Foundation, 22 Mar. 2014. Web. 23 Mar. 2014.. "How Spiders Work." HowStuffWorks. N.p., n.d. Web. 29 Mar. 2014.

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"SPIDERLINGS." Spider Facts. N.p., n.d. Web. 29 Mar. 2014..http://www.kidzone.ws/lw/spiders/facts08.htm "Araneae - spiders." Araneae - spiders. N.p., n.d. Web. 29 Mar. 2014..http://www.ento.csiro.au/education/allies/araneae.html "Panarthropoda.de - General - Scorpions." Panarthropoda.de - General - Scorpions. N.p., n.d. Web. 29 Mar. 2014..http://www.panarthropoda.de/sub/allgemeines/paarungskorpioneen.php Gary A. Polis (1990). The Biology of Scorpions. Stanford University Press.ISBN 978-0-8047-1249-1.The Biology of ScorpionsStanford University PressISBN978-0-8047-1249-1 Wall, Richard & David Shearer (2001). "Ticks (Acari)". Veterinary Ectoparasites: Biology, Pathology, and Control. John Wiley & Sons. pp. 55- 60. ISBN 978-0-632-05618-7. http://journals.cambridge.org/download.php?file=%2FPOL%2FPOL39_03 %2FS0032247403003097a.pdf&code=147a6e441943f3396dc05fe2f918880 a