Plectida is an order of nematodes. There are 472 species of Plectida, in 81 genera and 15 families. It includes groups like Aulolaimidae and Aegialoalaimidae.
Definition: overall repetitive or reflective pattern in the body of one individual of this taxon. eg: bilateral symmetry, rotational symmetry, radial symmetry
Definition: motion characterized by wave-like movement patterns that act to propel an animal forward. eg: crawling in snakes, or swimming in the lamprey. Typically utilized by limbless animals