Scorpions have mouth (chelicerae), a pair of pedipalps, and four pairs of legs. The pedipalps are used for capture and defense. Their body is divided into two main regions. They are called a cephalothorax and an abdomen. The scorpions' bodes are covered with sensory hair.
These two portions are held together by a narrow stalk called the pedicel. This narrow junction allows for the spider to be very limber and acts somewhat as a hinge between the prosoma and opisthosoma. So as a spider moves foward creating a web, it can continue in a straight line throwing its webbing in the direction it chooses. This is how spiders create their zig-zag web formations. (Biology of Spiders, R.Foelix) Covering both the prosoma and the opisthosoma is a waxy covering that enables the spider to be a very efficient water conserver.
Wolf spiders belong to Lycosidae family which means wolf. This spider has eight eyes and because of this, its vision is excellent, and it can easily communicate through the eyes. The other species may hunt their prey from the vibration sound, but this species is entirely different because it trails after seeing its prey. The eight eyes are arranged in 3 rows. The first row consists of 4 eyes; these eyes are small in size.
Chondrichthyes vs Arthropod The black widow is most easily recognized by the hourglass marking on the underside of its abdomen. When bitten, a neurotoxin is released that can cause dull pain and cramping in muscles, that can be accompanied by sweating and vomiting. Less than 1% of black widow bites result in death. Black widow spiders are usually not aggressive. If disturbed, they will retreat to a corner of their web.
This genus is famous for having spiders with a poisonous bite (Preston-Mafham 1984). Black Widow Spider http://pubs.ext.vt.edu/444/444-422/444-422.html Physiology (Muscles/skeletal/locomotion) The spider’s body is relatively simple. Similar to the rest of the species in Arthropoda, the spider has an exoskeleton that protects it from its environment. This exoskeleton protects the entire body of the spider that includes two segmented sections (the cephalothorax and the abdomen), as well as the four pairs of legs. An example of sexual dimorphism in the Southern Black... ... middle of paper ... ...itude towards spiders is favorable… Although many people, especially in the West, feel a high degree of revulsion towards spiders and may in fact be frightened by them” (Mafham 1984).
Arthropoda Arthropods are animals belonging to the phylum Arthropoda, which is the largest of all phyla in the Animal Kingdom, with more than one million species, making them almost 80% of the whole kingdom. These include insects, arachnids, crustaceans and many more, most of which are quite small, the biggest being the Japanese Spider Crab with a leg span of 3.5 meters and the smallest being the microscopic Plankton. *Characteristics: - Segmented Body. - Exoskeleton. This is a hard outer body covering which protects the internal organs.
Adult black widow spiders have a shiny, black, rounded, circular abdomen and are about 1/3 inch long (about 1-1/2 inches when their legs are spread). Adult spiders have two reddish or yellowish triangles on their bottom which looks like an hourglass marking, and their body color is dark colored usually black or sometimes dark brown. They are usually recognized because of their red or red-orange hourglass design on the bottom of their abdomen. This pattern is changeable and may look like two separated spots. In some spiders there is no pattern on the abdomen.
Spiders are grouped into this class as well as scorpions, ticks, mites, and many more organisms. The order, Araneae, is comprised of spiders. How do spiders and arachnids compare? While spiders and arachnids have many mutual traits, spiders differ in some key categories. All arachnids have similar anatomies, one of the most common traits being the number of appendages.
This chemical enters predators when the centipede pierces the predator’s skin with its leg. A centipede’s last pair of legs can be used like antennae to feel their way along when they are walking backwards. Centipedes are classified in the kingdom Animalia, the phylum Arthropoda, the class Chilopoda, the order Lithobiomorpha, and the family Lithobiidae. Some specific kinds of centipedes include the Lithobius fortificatus (garden centipede), Hemiscolopendra marginata (Florida blue centipede), the Gigantea robusta (Peruvian giant), and the Heros castaneiceps (Red headed). Centipedes are found almost anywhere, except for deep deserts and Polar Regions.
Insects are the largest of this phylum and make up the largest class of all organisms and are recognized by taxonomist to have nearly one million recognized species. It is estimated that their are over ten million species still undiscovered. Because of this the insect orders are thought to be the least well known. Most of which are beetles and insects in tropical areas. Insects are part of 28 living orders which all have three body sections, head, thorax, abdomen and six legs and a pair of antenas.