Arachnids are arthropods in the class Arachnida (/ əˈræknɪdə /) of the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, harvestmen, camel spiders, whip spiders and vinegaroons. [2] Adult …

2025年2月25日 · arachnid, (class Arachnida), any member of the arthropod group that includes spiders, daddy longlegs, scorpions, and (in the subclass Acari) the mites and ticks, as well as lesser-known subgroups.

2024年12月16日 · Arachnids are joint-legged arthropods of the class Arachnida, belonging to the subphylum Chelicerata. They include spiders, scorpions, ticks, mites, pseudoscorpions, camel spiders, whip scorpions, and tailless whip scorpions.

2019年10月4日 · The class Arachnida includes a diverse group of arthropods: spiders, scorpions, ticks, mites, harvestmen, and their cousins. Scientists describe more than 100,000 species of arachnids. In North America alone, there are about 8,000 arachnid species. The name Arachnida is derived from the Greek aráchnē with ties to a myth.

The arachnids (class Arachnida) are an arthropod group that includes spiders, daddy longlegs, scorpions, mites, and ticks as well as lesser-known subgroups. There are more than 40,000 species of arachnids in the world.

Arachnida is one of the classes of the subphylum Chelicerata (including horseshoe crabs, sea scorpions, and sea spiders) of the phylum Arthropoda. Arachnids are characterized by four pairs of segmented walking legs and a body divided into …

The meaning of ARACHNID is any of a class (Arachnida) of arthropods comprising chiefly terrestrial invertebrates, including the spiders, scorpions, mites, and ticks, and having a segmented body divided into two regions of which the anterior bears four pairs of …

2019年11月19日 · An arachnid is an invertebrate animal in the class Arachnida. Arachnida itself is part of a larger group of animals known as arthropods. Like all arthropods, arachnids have jointed legs, segmented bodies, and hard, external exoskeletons. …

arachnid , Any member of the class Arachnida, primarily carnivorous arthropods having a well-developed head, a hard external skeleton, and four pairs of walking legs. Spiders and scorpions have a segmented body, but daddy longlegs, ticks, and mites do not. Arachnids range in size from tiny mites (0.003 in. [0.08 mm] long) to the 8-in. (21-cm ...

Basic characteristics of arachnids include four pairs of legs (1) and a body divided into two segments: the cephalothorax (2) and the abdomen (3). The arachnids are a class of eight-legged arthropods. [1] .