Arachnids - other structures They can also bear modified...

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CHELICERFORMS / ARACHNIDS Earliest cheliceriforms were water scorpions. 60,000 species known although many mites remain undescribed or  undiscovered. Most arachnids are solitary except for the time of mating Females may guard their eggs or young, which are often born live. Habitat These are mostly marine or terrestrial creatures, and some species include  spiders, scorpions, ticks, and mites. Characteristics The body is divided into two parts: anterior and posterior The anterior part is the cephalothorax which contains the sense organs,  mouthparts, and limbs. The posterior part of the body, the abdomen, holds the genital opening and 
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Unformatted text preview: other structures. They can also bear modified lungs called book lungs. • They bear six pairs of appendages (chelicerae, pedipalps, and four pairs of walking legs) • Spiders use their fang-like chelicerae, which are equipped with poision glands to attack prey. • Ticks carry organisms that can cause serious diseases in humans such as Lyme disease. Anatomy DID YOU KNOW? Spiders eat spiders. Females sometime eat their mates during mating; other spiders will eat other species of spiders. In some countries spiders are a delicacy; they taste nutty and sticky....
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This note was uploaded on 06/08/2008 for the course BI 211 taught by Professor Wheat during the Spring '07 term at Linn Benton Community College.

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Arachnids - other structures They can also bear modified...

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