What are the main classes of arthropods and their characteristics?
What are the main classes of arthropods and their characteristics?
Arthropods are traditionally divided into 5 subphyla: Trilobitomorpha (Trilobites), Chelicerata, Crustacea, Myriapoda, and Hexapoda. Myriapoda is divided into four classes: Chilopoda (centipedes), Diplopoda (millipedes), Pauropoda, and Symphyla. Millipedes were likely the very first animals to live on land.
What are the major classes of arthropods?
The phylum Arthropoda is commonly divided into four subphyla of extant forms: Chelicerata (arachnids), Crustacea (crustaceans), Hexapoda (insects and springtails), and Myriapoda (millipedes and centipedes).
What are the features of Arthropoda?
General Characteristics of Arthropods The body of arthropods is bilaterally symmetrical. These animals are triploblastic, and the body is segmented into head, thorax, and abdomen. They have jointed appendages that help in movements. The body cavity is filled with white coloured blood that is known as haemocoel.
How do arthropods live?
Most arthropods that live in the water have gills. Arthropods that live on land have a series of tubes throughout their body called a tracheae. Arthropods are bilaterally symmetrical, that means that if you sliced them from top to bottom, each half would be exactly the same!
Is shrimp a fish or insect?
They’re called crustaceans. Shrimp, crabs, lobsters – they’re arthropods, just like crickets. They’re also scavengers, which means their diets are as filthy as any bug’s. Many of these arguments have been around for more than a century.
What is the world’s largest arthropod?
giant robber crab
How many layers are there in an arthropod’s exoskeleton?
The exoskeleton has four major layers: the outermost epicuticle, the exocuticle, the endocuticle, and the inner membranous layer.
Are humans exoskeleton?
An exoskeleton (from Greek έξω, éxō “outer” and σκελετός, skeletós “skeleton”) is the external skeleton that supports and protects an animal’s body, in contrast to the internal skeleton (endoskeleton) of, for example, a human. In usage, some of the larger kinds of exoskeletons are known as “shells”.