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arachnid: [noun] 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 legs but no antennae.
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 ...
Oct 4, 2019 · Arachnid Classification. Arachnids, like insects, are arthropods. All animals in the phylum Arthropoda have exoskeletons, segmented bodies, and at least three pairs of legs. Other groups belonging to the phylum Arthropoda include Insecta (insects), Crustacea (e.g., crabs), Chilopoda (centipedes), and Diplopoda (millipedes).
Jun 8, 2018 · Arachnid. An arachnid is an invertebrate (an animal without a backbone) that has four pairs of jointed walking legs. Most arachnids, like spiders, ticks, scorpions, and mites, live on land and have two main body parts. Many arachnids prey on other invertebrates, while some are parasites.
Jan 29, 2019 · The Arachnid Arthropods. Arachnids (Arachnida) are a group of arthropods that include spiders, ticks, mites, scorpions and harvestmen. Scientists estimate that there are more than 100,000 species of arachnids alive today. Arachnids have two main body segments (the cephalothorax and the abdomen) and four pairs of jointed legs.
Apr 30, 2024 · Spider, any of more than 46,700 species of arachnids that differ from insects in having eight legs rather than six and in having the body divided into two parts rather than three. All spiders are predators, feeding almost entirely on other arthropods, especially insects.
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] They are a highly successful group of mainly terrestrial invertebrates: spiders, [2] scorpions, harvestmen, ticks, and mites, and a number of ...
