Explanation

Despite "centi" in their name, which implies 100 legs,

centipedes can have fewer than 20 legs to more than 300 legs,

but they always have an odd number of pairs of legs.

Centipedes are long, thin arthropods with one pair of legs per body segment

while 

An herbivore is an organism that mostly feeds on plants

A vertebrate is an animal that has a backbone and a skeleton.