Arachnida
Arachnida
Arachnida (/əˈræknɪdə/; from Greek: ἀράχνη, aráchnē, 'spider') is a class of joint-legged invertebrate animals (arthropods), in the subphylum Chelicerata. Arachnida includes orders containing spiders, scorpions, ticks, mites, harvestmen, and solifuges.
Etymology
The name "Arachnida" is derived from the Greek word ἀράχνη (arachne), meaning "spider". It was first used in scientific classification by French zoologist Jean-Baptiste Lamarck in 1801.
Characteristics
Arachnids are characterized by their eight legs and lack of antennae. They have a two-part body (the cephalothorax and the abdomen) and chelicerae that are often adapted into fangs or pincers. Most species of arachnids are carnivorous, feeding on smaller insects and other arachnids.
Orders
Arachnida comprises several orders, including:
- Araneae (spiders)
- Scorpiones (scorpions)
- Acari (ticks and mites)
- Opiliones (harvestmen)
- Solifugae (solifuges)
Each of these orders contains numerous species, each with their own unique characteristics and behaviors.
Related Terms
- Chelicerata: The subphylum to which arachnids belong.
- Arthropod: The phylum to which arachnids belong.
- Invertebrate: Animals without a backbone. Arachnids are a type of invertebrate.
- Carnivorous: Animals that feed on other animals. Most arachnids are carnivorous.
External links
- Medical encyclopedia article on Arachnida
- Wikipedia's article - Arachnida
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski