Which arthropod has a cephalothorax and abdomen?
Arachnids
Arachnids are a group of arthropods that include spiders and ticks. They have two body parts: the cephalothorax (head-middle) and the abdomen.
What organisms are found in subphylum chelicerata?
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 is the abdomen of an arthropod?
The abdomen is one of the three main body segments (or tagmata) of insects. It is also the name given to one of the two main body parts of spiders although this is more commonly known as the Opisthosoma. The abdomen is the posterior most of the segments. Opisthosoma.
What are the characteristics of class Arachnida?
Arachnids have the following characteristics:
- Four pairs of legs (eight total).
- Arachnids also have two additional pairs of appendages.
- Arachnids do not have antennae or wings.
- The arachnid body is organized into the cephalothorax, a fusion of the head and thorax, and the abdomen.
Which Subphylum has body sections described as a cephalothorax and abdomen?
Chelicerata
The Class arachnida is a large and diverse group. All arachnids belong to a subphylum (a division of Arthropoda) known as the Chelicerata, of which there are approximately 65,000 described species (~8,000 in North America). They are characterized by having two body regions, a cephalothorax and an abdomen.
What are chelicerata named 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.
Do all arthropods have a cephalothorax?
Most arthropod’s bodies have three sections – the head, the thorax, and the abdomen. The thorax is the part of the body between the head and the abdomen. In some species of arthropods, the head and the thorax are one section called the cephalothorax. Most arthropods that live in the water have gills.
What is the main difference between the cephalothorax and abdomen in crustaceans?
Cephalothorax is a fusion of two main body regions, whereas the abdomen is one distinctive region.
Which two classifications contain animals that have both a cephalothorax and an abdomen?
The Class arachnida is a large and diverse group. All arachnids belong to a subphylum (a division of Arthropoda) known as the Chelicerata, of which there are approximately 65,000 described species (~8,000 in North America). They are characterized by having two body regions, a cephalothorax and an abdomen.
What features do arachnids share with arthropods?
Like other arthropods, arachnids have paired, jointed appendages, a hardened exoskeleton, a segmented body, and a well-developed head.
How does the cephalothorax help arthropods?
Cephalothorax helps in the accumulation of lipids in some arthropod species like M.norvegica. Various scientists study sea crustaceans Cylde Sea krill and observed that the cephalothorax structure contains lipids in a higher ratio than in the abdomen.
Where does the name cephalothorax come from?
The cephalothorax is a structure typically found in anthropods formed by a special fusion of the smaller morphological segments like head and thorax. It is also called prosoma which is also referred to as abdomen in other groups. The word Cephalothorax is derived from a Greek word, cephalo refer to head and thorax refers to the abdomen.
Where are the jointed appendages of an arthropod located?
The head The thorax (midbody region) Abdomen Some, like the crab, have a head that is fused with the thorax, cephalothorax Dragonfly segments HEAD Thorax Abdomen Jointed Appendages Appendage –structure that extends from the arthropod’s body wall Unlike parapodia and setae, they bend Arthropoda literally means “joint footed”
How many legs does an arthropod have?
Following are three major subphyla of arthropods, with some of their defining features. Body Tagmata: Often three (head, thorax, abdomen), but sometimes two (cephalothorax and abdomen, as in crabs). Legs: the number of legs is variable in crustaceans. Antennae: Two pairs (other arthropods have one pair or none).