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Paradoxides was a genus of relatively large trilobites, extinct marine arthropods, that form the class Trilobita found throughout the world during the Mid Cambrian period (540 million years ago). It was a moderately large trilobite with a semicircular head, free cheeks each ending with a long, narrow, recurved spine, and relatively large eyes. Its elongated trunk was composed of 20 segments and again was adorned with longish, recurved lateral spines. Its pygidium(caudal shield) was comparatively small and had one or two pairs of long spines on the posterior margin.

Paradoxides Harlani

Paradoxides was a genus of relatively large trilobites, extinct marine arthropods, that form the class…

The name of animals of the class Arachnida. Scorpions have an elongated body, suddenly terminated by a long slender tail formed of six joints, the last of which terminates in an arcuated and very acute sting, which effuses a venomous liquid.

Arachnid Scorpion

The name of animals of the class Arachnida. Scorpions have an elongated body, suddenly terminated by…

Centipedes are arthropods belonging to the class Chilopoda and the Subphylum Myriapoda. They are elongated metameric animals with one pair of legs per body segment. A key trait uniting this group is a pair of venom claws or forcipules formed from a modified first appendage. This also means that centipedes are an exclusively predatory taxon, which is uncommon.

Centipede

Centipedes are arthropods belonging to the class Chilopoda and the Subphylum Myriapoda. They are elongated…

Scorpions are any arachnid of the order Scorpionida. Unlike the majority of arachnid species, scorpions are viviparous. The young are born one by one, and the brood is carried about on its mother's back until the young have undergone at least one moult. All known Scorpion species possess poison or venom. Scorpions use their venom to kill or paralyze their prey so that it can be eaten; in general it is fast-acting, allowing for effective prey capture.

Scorpion

Scorpions are any arachnid of the order Scorpionida. Unlike the majority of arachnid species, scorpions…

The itch mite (Sarcoptes) is a genus of skin parasites, and part of the larger family of mites collectively known as "scab mites". Adult scabies mites are spherical, eyeless mites with four pairs of legs. They are recognizable by their oval, ventrally flattened and dorsally convex tortoise-like body and multiple cuticular spines. Females are 0.30 to .45 mm long and 0.25 to 0.35 mm wide, and males are just over half that size.

Itch Mite

The itch mite (Sarcoptes) is a genus of skin parasites, and part of the larger family of mites collectively…

Spiders (order Araneae) are air-breathing chelicerate arthropods. Trapdoor spiders, of family Ctenizidae, are medium-sized mygalomorph spiders that construct burrows with a cork-like trapdoor made of soil, vegetation and silk. The Trapdoor Spider is difficult to see when it is closed because the plant and soil materials effectively camouflage it. The trapdoor is hinged on one side with silk. The spiders, which are usually nocturnal, typically wait for prey while holding onto the underside of the door with the claws on their tarsi. Prey is captured when insects, other arthropods, or small vertebrates venture too close to the half-open trapdoor at night. The spider detects the prey by vibrations and when it comes close enough, the spider leaps out of its burrow and captures it.

Trapdoor Spider

Spiders (order Araneae) are air-breathing chelicerate arthropods. Trapdoor spiders, of family Ctenizidae,…

Trilobites ("three-lobes") are extinct marine arthropods that form the class Trilobita. Why the trilobites became extinct is not clear. Their numbers began to decrease with the appearance of the first sharks and other early gnathostomes (jawed vertebrates) in the Silurian and their subsequent rise in diversity during the Devonian period. Trilobites may have provided a rich source of food for these new animals.

Dicellocephalus Minnesotenis a Trilobite

Trilobites ("three-lobes") are extinct marine arthropods that form the class Trilobita. Why the trilobites…

Trilobites ("three-lobes") are extinct marine arthropods that form the class Trilobita. Why the trilobites became extinct is not clear. Their numbers began to decrease with the appearance of the first sharks and other early gnathostomes (jawed vertebrates) in the Silurian and their subsequent rise in diversity during the Devonian period. Trilobites may have provided a rich source of food for these new animals. Fossilised trilobites are often found enrolled (curled up) like modern woodlice for protection; evidence suggests enrollment helped protect against exploitation of arthropod cuticle weakness by Anomalocarid predator attacks.

Dicellocephalus Minnesotenis a Trilobite

Trilobites ("three-lobes") are extinct marine arthropods that form the class Trilobita. Why the trilobites…

Trilobites ("three-lobes") are extinct marine arthropods that form the class Trilobita.The earliest trilobites had complex, compound eyes with lenses made of calcite, a unique characteristic of all trilobite eyes. The trilobite eyes were typically compound, with each lens being an elongated prism. The number of lenses in such an eye varied: some trilobites had only one, while some had thousands of lenses in a single eye. In these compound eyes, the lenses were typically arranged hexagonall (b).

Dicellocephalus Minnesotenis a Trilobite

Trilobites ("three-lobes") are extinct marine arthropods that form the class Trilobita.The earliest…