What does the name Chelicerata mean?
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What does the name Chelicerata mean?
The name Chelicerata is derived from the chelicera, the anterior-most appendage. Whereas the chelicerae of such groups as daddy-long-legs, scorpions, and horseshoe crabs are chelate (appearing distally as a pair of scissors), some groups have evolved highly specialized chelicerae.
How many Chelicerata do we have?
Extant chelicerates include spiders, scorpions, ticks, and mites (class Arachnida), horseshoe crabs (class Xiphosura or Merostomata), and sea spiders (class Pycnogonida). Chelicerata is one of five subphyla into which arthropods are typically divided….Chelicerata.
| Kingdom: | Animalia |
|---|---|
| Subphylum: | Chelicerata Heymons, 1901 |
What is the function of the Chelicerate?
The chelicerae are specialized pair of appendages that appear before the mouth. These appendages have become a part of the mouth and in spiders, the chelicerae form fangs. These fangs may be associated with a venom gland and therefore are used to inject venom into a prey or into a potential threat.
Is Chelicerata a class?
Chelicerata belong to the class Arachnida, containing the spiders, scorpions, ticks, and mites. They are largely terrestrial arthropods, living beneath stones and logs, in leaf mold, and in vegetation, but there are some aquatic mites that live in fresh water and in the sea.
What are Chelicerata name after?
The subphylum Chelicerata (New Latin, from French chélicère, from Greek χηλή, khēlē “claw, chela” and κέρας, kéras “horn”) constitutes one of the major subdivisions of the phylum Arthropoda.
Does Chelicerata have wings?
The phylum arthropoda includes insects (hexapoda), spiders (arachnids), crustaceans, and myriapods….Spiders and Insects.
| Spider | Insect | |
|---|---|---|
| Legs | four pair | three pair |
| Pedipalps | one pair six segments | none |
| Poison apparatus | on fangs | If present on abdomen |
| Wings | none | most adults have |
What are chelicerata name after?
What are the classes under chelicerata?
The Chelicerata are divided into four classes:
- Arachnida (spiders, scorpions, mites, ticks, etc.)
- Xiphosura (horseshoe crabs)
- Eurypterida (sea scorpions, extinct)
- Pycnogonida (sea spiders)
What are the differences between crustaceans and Chelicerata?
Differences which set chelicerata apart from crustaceans include chelicerata having uniramous limbs where as crustaceans have biramous limbs. A uniramous limb comprises a single series of segments attached end-to-end. Crustaceans have 6 pairs of legs whereas chelicerata have 6 pairs.
What is unique about Chelicerata?
Chelicerates have two body segments; a cephalothorax and an abdomen. They have no antennae, but have six pairs of appendages. The most anterior appendages are called the chelicerae and are normally modified into pincers or fangs.
Where can I get Chelicerata?
Common name: chelicerates, arachnids Chelicerata is a division within the Arthropoda, containing animals such as spiders, scorpions, harvestmen, mites and ticks. Like all arthropods, they have a segmented body and segmented limbs and a thick chitinous cuticle called an exoskeleton.
Where can I get chelicerata?
What is the meaning of chelicerate?
Definition of chelicerate. : an arthropod of the subphylum Chelicerata having the first pair of appendages modified into chelicerae Arthropods constitute the largest phylum by far, with major subgroups of insects, chelicerates (spiders, mites, scorpions, and horseshoe crabs), and crustaceans …— Stephen Jay Gould, Natural History, January 1995.
What are the three classes of Chelicerata?
The Chelicerata comprise three classes: the enormous group Arachnida (spiders, ticks, mites, scorpions, and related forms); the Pycnogonida (sea spiders or nobody-crabs); and the Merostomata (including the Xiphosurida or horseshoe crabs).
What is the difference between chelicerates and horseshoes?
The abdominal appendages of modern chelicerates are missing or heavily modified – for example in spiders the remaining appendages form spinnerets that extrude silk, while those of horseshoe crabs (Xiphosura) form gills.
What is the difference between aquatic and terrestrial Chelicerata?
Fossil aquatic Chelicerata are known from the Cambrian, and terrestrial species are known from the Devonian. The subphylum includes two classes: Merostomata, which live only in seas, and Arachnoidea, which are mainly terrestrial.