What are the classes of Chelicerata?

What are the classes of Chelicerata?

It is generally agreed that the Chelicerata contain the classes Arachnida (spiders, scorpions, mites, etc.), Xiphosura (horseshoe crabs) and Eurypterida (sea scorpions, extinct).

Is Chelicerata a Marine?

Chelicerata include horseshoe crabs, scorpions, spiders, and mites. They originated as marine animals, possibly in the Late Ordovician period.

How many Chelicerata classes do we have?

CHELICERATA CHARACTERISTICS The Chelicerata are placed in three separate classes. The Merostomata (horseshoe crabs), Pycnogona (sea spiders), and Arachnida (spiders, scorpions etc.)

What makes a Chelicerata a 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.

What is the difference between hexapoda and Chelicerata?

The Hexapoda include insects; the Crustacea include lobster, crabs, and shrimp; the Myriapoda include centipedes and millipedes; and the Chelicerata include spiders, scorpions.

How many legs does Chelicerata?

They are characterized by having two body regions, a cephalothorax and an abdomen. They also have 6 pairs of appendages: 4 pairs of legs and 2 pairs of mouthpart appendages, the first are called chelicerae (hence, the subphylum Chelicerata).

Does Chelicerata have antenna?

Interestingly, chelicerates lack antennae, the only major clade of arthropods to lack them. Appendages on the abdomen are reduced.

Is Chelicerata a class?

classification of arthropods 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 difference between Hexapoda and Chelicerata?