Question

Most primitive arthropods belong to the class

Answer 1

In their monophyletic classification scheme (Cladogram 3), Crustacea and Chelicerata are the most primitive groups. Insects, myriapods, and onychophora are grouped together in the superclass Uniramia because of similarities in leg structure and locomotion.

Answer 2

Most primitive arthropods belong to class Merostomata , as it is the only class in arthropoda with extinct species.

Explanation:

• Most of the primitive arthropod appeared on earth in the Cambrian period which is around 541 million to 480 million years ago ,represented by Trilobites , merostomes and crustaceans.
• Most of the primitive arthropods that appear on earth were not properly classified because their characters. resembles both annelids and arthropods.
• The subphylum Trilobitomorpha was specifically made for the primitive arthropods including Trilobites.
• Merostomata class includes Merostomes, Eurypterida etc.

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