tetraconata

>> ECDYSOZOA

- Tetraconata (phylum) (or first phylum of Arthropoda in other models): Crabs and allies plus insects - Krustentiere und Insekten

-.- Hexapoda (subphylum): Sechsfüsser

The phylogenetic model of Hexapoda is discussed controversely, it still remains unclear where to put Diplura (see Wiki); therefore three models are shown:

-.-/-A- Entognatha (classis)

-.-/-A1- Ellipura (seria)

-.-/-A1a- Collembola ([sub]classis): Springtails - Springschwänze

-.-/-A1b- Protura ([sub]classis/ordo): Coneheads - Beintastler

-.-/-A2- Diplura ([sub]classis/ordo): Two-pronged bristletails - Doppelschwänze

-.-/-B- Ectognatha (classis)

-.-/-B-.- Insecta ([sub]classis): Insects - Insekten

Alternative model 1: two groups Collembola/Protura vs. Diplura/Insecta considered to be on the same classification levely

Alternative model 2: three groups, Collembola/Protura grouped to gether as well as two separate groups Diplura and Insecta