Question | Answer |
Subphyla of Arthropoda is divided on the basis of what? | Mouthparts, Appendage structure, Antennae number and primary habitat |
Mouthparts | Mouthparts are hollow mandibles or Chelicerae (hollow fangs).
The mandibles are always horizontally opposed |
Appendage Structure | Uniramous ( last segment of a leg is unbranched)
Biramous ( legs end in forked structure) |
Antennae Number | 0 Spiders, 1 insects, 2 Crayfish |
Primary habitat | Aquatic or terrestrial, aquatic Arthropods are 1st |
Subphylum Chelicerta Aquatic | Mouthparts are chlicertae, appendages are primitive and biramous, antennae are absent. |
Subphylum Chilicerata Terrestrial | Advanced antennae are absent are uniramous |
Subphylum Crustica | Mouthparts are mandibles. Biramous Appendages, 2 pairs of antennae ,Vast majority are aquatic |
Subphylum Mirapodia | Mouthparts are mandibles, Appendages are uniramous, 1 pair of antennae. They have a primarily terrestrial habitat. Have many body segments . Limited tagmosis |
Subphylum Insecta | Mouthparts are mandibles. Appendages Uniramous, 1 pair of antennae, vast majority are terrestrial. |
Chlicerate Class Meristoma | Horse shoe crabs |
Chlicerate class pinchogondia | sea spiders |
Class Arachnida | Spiders scorpions, ticks and mites |