We don't have a page "Entomobryomorpha". Is this a new genus for the guide? Do we need to create a new page?

But from googling it looks as though Entomobryomorpha is a name (old?/alternate?/taxon level BG doesn't show?) for something along the lines of Elongate-bodied Springtails. I'm sure I will be corrected or something, but I just wanted to slow down the creation of guide pages - just in case.

In current Collembola taxonomy, Arthropleona is out-dated and replaced by Poduromorpha (elongated forms with prothoracic tergite present) + Entomobryomorpha (elongated forms with prothoracic tergite absent). The two latter form a paraphyletic grouping. Therefore Arthropleona is rejected. Only monophyletic groupings are accepted as 'natural' groupings in modern cladistic taxonomy. Other groupings are artificial aasemblages and therefore rejected.
Conclusion: BugGuide is using an out-of-date taxonomy for Collembola.
For a state of the art taxonomy, feel free to visit collembola.org

I appreciate the detailed explanation. I think that we should start using the updated system ASAP. I found this forum discussion http://bugguide.net/node/view/168650

Indeed, also Entognatha has been rejected. In summary: Entognatha is dropped and its members, that is Protura, Diplura and Collembola have been raised to Class rank. They are now considered at the same level as Insecta. Protura, Diplura, Collembola and Insecta are grouped in Hexapoda. This view is currently widely accepted. It would be best that BugGuide adopts to this state of the taxonomy.

The discussion now is about the paraphyly of Hexapoda. But here is no consensus yet. In short, based on molecular research mainly, Insecta and Crustacea seem both paraphyletic. And Collembola seem more related to Crustacea then to Insecta... But this discussion is still ongoing.
Interested readers can find a summary to the question 'Are Collembola terrestrial Crustacea?' here:
http://www.collembola.org/publicat/crustacn.htm