The subphylum Chelicerata (from Neo-Latin, from French chélicère, from Ancient Greek χηλή (khēlḗ) 'claw, chela ' and κέρας (kéras) 'horn') [1] constitutes one of the major subdivisions of the phylum Arthropoda.

Subphylum Chelicerata Body divided into prosoma (cephalothorax) and opisthosoma (abdomen); no antennae; first pair of appendages consists of chelicerae flanking the mouth; in most chelicerates the other prosomal appendages are a pair of pedipalps and four pairs of legs.

Dec 16, 2024 · A major subphylum under Arthropoda, the Chelicerata includes sea spiders (pycnogonids), horseshoe crabs, and arachnids, such as harvestmen, scorpions, spiders, ticks, and mites.

Dec 13, 2019 · Chelicerates (Chelicerata) are a group of arthropods that includes harvestmen, scorpions, mites, spiders, horseshoe crabs, sea spiders, and ticks. There are about 77,000 living species of chelicerates. Chelicerates have two body segments (tagmenta) and six pairs of …

Jul 23, 2018 · There are about 120,000 species of chelicerate described, making them the second largest sub-phylum. Two groups of chelicerates are marine, the horseshoe crabs (Xiphosura) and the sea spiders (Pycnogonida), which together constitute less than 2% …

The subphylum Chelicerata is one of the five subdivisions of the phylum Arthropoda, with members characterized by the absence of antennae and mandibles (jaws) and the presence of chelicerae (a pincer-like mouthpart as the anterior appendage, composed of a base segment and a …

Subphylum Chelicerata Chelicerate arthropods are an ancient group that includes eurypterids (extinct), horseshoe crabs, spiders, ticks and mites, scorpions, and sea spiders.

The subphylum Chelicerata (/kəˌlɪsəˈreɪtə/ or /kəˌlɪsəˈrɑːtə/; New Latin, from French chélicère, from Greek khēlē "claw, chela" and kéras "horn") constitutes one of the major subdivisions of the phylum Arthropoda. It contains the horseshoe crabs, sea spiders, and arachnids (including scorpions and spiders).

The Chelicerata are a diverse group of arthropods—though not as diverse as the Mandibulata—named for the presence of chelicerae. Chelicerae, meaning “claw horn” in Greek, are a pair of appendages anterior to (i.e., in front of) the mouth.

Subphylum Chelicerata comprises a major group within Phylum Arthropoda, including such animals as the arachnids (e.g., spiders and scopions), the extinct eurypterids, and the extant horseshoe crabs that are considered to be living fossils.