Dichotomous Key/Arthropoda

Key to the Classes of Arthropoda

 * 1: Two pairs of antennae
 * 2: One pair of antennae or no antennae present.

1
incomplete

Branchiopoda Remipedia Cephalocarida Maxillopoda Ostracoda Malacostraca

2

 * Insecta: Three pairs of legs present.
 * 4: Four or more pairs of legs present.

4

 * 5: Antennae present.
 * 6: Antennae absent.

5
incomplete

Chilopoda Diplopoda Pauropoda Symphyla

6
incomplete

Crustacea Chelicerata
 * Branchiopoda
 * Remipedia
 * Cephalocarida
 * Maxillopoda
 * Ostracoda
 * Malacostraca
 * Arachnida
 * Merostomata
 * Pycnogonida