The following
paper argues that the primitive hexapods (Protura, Diplura,
Collembola) clade together (with other insects) in a holophyletic Hexapoda.
What is
really interesting about the following
paper is that Protura and Diplura may form a clade which they call
Nonoculata. If so, it provides further proof that Protura + Collembola do
NOT form an exclusive clade called Ellipura. So I guess Nonoculata +
Ectognatha could clade together, while Collembola could have evolved
hexapody convergently. So the hexapod debate continues with yet another
"twist". Anyway, here's a link to that paper:
------Cheers,
Ken Kinman