Question

Peripatus is a connecting link between

• A. Coelenterata and Porifera
• B. Ctenophora and Platyhelminthes
• C. Mollusca and Echinodermata
• D. Annelida and Arthropoda

Answer 1

Answer: (D)

Annelida and Arthropoda

Peripatus is a connecting link between annelid and arthropod. Peripatus is an invertebrate, said to be a living fossil because the living members appear similar to fossil species as much as 570 million years old, and because the group is transitional between the Arthropoda (including crustaceans and insects) and primitive Ecdysozoa such as tardigrades, priapulids and nematodes. Peripatus is a nocturnal carnivore.

Its arthropods characters are claws, jaws, haemocoel, tracheae and dorsal tubular heart. The annelidan characters are continuous muscle layers in the body wall, unjoined legs and nephridia.