chelicerates
chelicerates
Chelicerates (crabs, Pycnogonida, and Mercostonata) are arthropods that lack jaws.
The mandibles of arthropods open side to side. The jaws of humans open up and down.
class cyclostomata are without jaws there eg are : petromyzon myxine
Chelicerates are a group of arthropods that lack jaws. Examples of chelicerates include horseshoe crabs, mites, ticks, spiders, and scorpions. Arthropods that have jaws are classified as mandibulates.
Mandibles are jaws and are used for eating.
Well, actually, arthropods don't have jaws, but I know what you mean. Arthropods have mandibles. Mandibles open side to side, which is great for slicing and tearing!
No, not all. Remember some arthropods are aquatic; the spiracle/trachea/tracheole system utilized by terrestrial insects is largely replaced by gills in marine arthropods.
one is a chelicerae and the other is a menimable
arthropods.
In the face and jaws.
Some animals in phylum arthropods is a spider, centipedes or crabs.