Phylum= ArthropodaPhylum= ArthropodaSubphylum= ChelicerataSubphylum= Chelicerata

By Trevor Mahn and By Trevor Mahn and Daniel ThibaultDaniel Thibault

5-27-095-27-09Period 2Period 2

http://nma1.us/breaktime/2004-04/images/alan-camel_spider.jpg

Camel Spider: Syndaesia solifugid

ClassificationClassification

Characterized by the absence Characterized by the absence of antennae, jaws, and the of antennae, jaws, and the presence of feeding structures presence of feeding structures such as pincer-like appendagessuch as pincer-like appendages

Physical TraitsPhysical Traits

Always have eight legsAlways have eight legs

Segmented bodies with jointed limbsSegmented bodies with jointed limbs

Either have pincers or fangsEither have pincers or fangs

Tube like hearts and body cavityTube like hearts and body cavity

Marine ones have gillsMarine ones have gills

Some have very hard shell that can Some have very hard shell that can barely be brokenbarely be broken

No wingsNo wings

ReproductionReproduction

Aquatic chelicerates use external Aquatic chelicerates use external fertilizationfertilization

Internal fertilization or in other words Internal fertilization or in other words sexual reproduction for land cheliceratessexual reproduction for land chelicerates

Feeding and Digestive SystemFeeding and Digestive System

Guts are too narrow to take or digest solid Guts are too narrow to take or digest solid foodfood

Some are parasites, some predatory, Some are parasites, some predatory, some vegetarians, some scavengersome vegetarians, some scavenger

Some vegetarians use nectar or pollen to Some vegetarians use nectar or pollen to get food get food

http://www.absoluteastronomy.com/topics/Chelicerata

Circulatory SystemCirculatory System

They have open circulatory They have open circulatory systems which most arthropods systems which most arthropods dodo

Have arteries but don’t use Have arteries but don’t use veins like people doveins like people do

Respiratory SystemRespiratory System

Depends on what sub-group they are inDepends on what sub-group they are in

Some have book lungsSome have book lungs

Some have book gillsSome have book gills

Living EnvironmentLiving Environment

Dependant on what Dependant on what kind of chelicerate it iskind of chelicerate it is

Some live in the Some live in the oceanocean

Some live in dessertsSome live in dessertsSome can live in your Some can live in your house house http://www.biologycorner.comhttp://www.biologycorner.com/resources/spider_labeled.gif/resources/spider_labeled.gif

People InteractionsPeople Interactions

Some are eaten by peopleSome are eaten by people

Some such as spiders can be harmful Some such as spiders can be harmful through bitesthrough bites

Some like scorpions have harmful stingsSome like scorpions have harmful stings

Some parasites like ticks can be harmful Some parasites like ticks can be harmful tootoo

Unique FeaturesUnique Features

Very small but many are still predatorsVery small but many are still predators

Originated as marine animals but slowly Originated as marine animals but slowly evolved into land dwelling animalsevolved into land dwelling animals

Scientists think there is about double the Scientists think there is about double the amount of chelicerates they have found amount of chelicerates they have found that have not been foundthat have not been found

Types of Chelicerates Types of Chelicerates

Sea-spidersSea-spiders

Horseshoe crabsHorseshoe crabs

SpidersSpiders

Mites and ticksMites and ticks

HarvestmenHarvestmen

False scorpionsFalse scorpions

SunspidersSunspiders

Small whipscorpionsSmall whipscorpions

WhipspidersWhipspiders

Thelyphonida Thelyphonida whipscorpionswhipscorpions

Micro whipscorpionsMicro whipscorpions

RicinuleiRicinulei

ScorpionsScorpions

Interesting FactsInteresting Facts

77, 000 different species77, 000 different species

People can actually eat fried tarantulaPeople can actually eat fried tarantula

Scorpions cause about 7, 000 deaths per Scorpions cause about 7, 000 deaths per year mostly in other countriesyear mostly in other countries

BibliographyBibliography

Various authors. Encyclopedia.com 5/20/09 Various authors. Encyclopedia.com 5/20/09 http://www.encyclopedia.com/topic/Chelicerata.aspxhttp://www.encyclopedia.com/topic/Chelicerata.aspx

Various authors. Absolute Astronomy. 5/20/09 Various authors. Absolute Astronomy. 5/20/09 http://www.absoluteastronomy.com/topics/Cheliceratahttp://www.absoluteastronomy.com/topics/Chelicerata