Cursorial

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Organism cursorial is a specially adapted organism to run. There are several different ways to distinguish cursory organisms; for example, they can be distinguished from eating habits so that a horse is a cursorial grazer and a cursory wolf. Cursorial organisms are usually adapted to long-distance run at high speeds, rather than animals with high acceleration at short distances; thus, a cheetah is considered at a glance, while a leopard is not. Among vertebrates, animals under 1 kg of mass are rarely considered at a glance, as they usually move in a series of short bursts rather than at constant speeds. All remaining cursorial vertebrates are endothermic, allowing high metabolic rates and high endurance, although perhaps some extinct species are ectothermic.

Some species of spiders are also considered a cursory, as they walk away from the day, looking for prey.

Video Cursorial

Adaptasi kursor

Locomotion vertebrata terestrial

Adaptations for cursor movements include:

• Increased step length by:
  • Increased bone length
  • Adopt a digitigrade or unguligrade position
  • Loss of clavicle in mammals, which allows the scapula to move forward and backward with the limb and thereby increase the length of the step.
  • Increased spinal flexion when running
• Reduce the distal weight (to minimize the moment of inertia):
  • Increase in proximal muscle mass by decreasing distal muscle mass
  • Increased long distal bone length (manus and pes) than the proximal (brachium or thigh).
  • The tendon is longer on the distal branch
• Reduced ability to move limbs outside the sagittal plane, which increases stability.
• The loss of digits.
• Loss of ability to become the pronation and supination of the forearm
• Nails, nails like nails, or dull claws for traction (compared to sharp claws to catch or climb prey)

Locomotion of spider

The spider keeps balance while walking, so the 1st and 3rd legs on one side and 2 and 4 on the other move, while the other four feet are on the surface. To run faster, the spider increases the frequency of its steps.

Maps Cursorial

Cadorial cache

Some important taxa are cursory, including some mammals (such as wolves and wolves), ungulates, agoutis, and kangaroos) and birds (such as ostriches), as well as some dinosaurs (such as theropods, and Heterodontosauridae). Some extinct archosaurs are also cursory, including crocodylomorphs Pristichampsus , Hesperosuchus , and several genera in Notosuchia.

Jump spiders and other non-web spiders generally run throughout the day, so they maximize the chance of capturing, and web-based spiders run away if threatened.

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In the theory of evolution

The cursorial nature of theropod dinosaurs is thought to be an important part of the aviation aviation ground-up theory (also called Cursorial theory), a theory that contradicts the notion that pre-flight bird ancestors are an arboreal species and puts that the flight apparatus may have been adjusted to improve hunting by extending leaps and improving maneuverability.

src: jeb.biologists.org

See also

• Arboreal
• Fossorial
• Casual hunting

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References

Source of the article : Wikipedia