I was telling someone that "platyhelminthes" is the last phylum which shows organ (and the only phylum) level of organization and after that all other phylas show "organ system level of organization". Now how's this question related to English? Well, I want to know how I can naturally express it.

After platyhelminthes all the phylas show organ system level of organization.

From aschelminthes on all the phylas show organ system level of organization. (Aschelminthes too shows organ system level of organization)

So what would sound natural "after" or "from......on"? What do you think?


"...level of organization, thereafter all other phylas show..."

Here's another thread about the usage of "after that".

  • And what about my options? Are they both unnatural? Jul 18 '19 at 11:57
  • @It'saboutEnglish Idk "after that" is pretty okay. I'm not a native either.
    – Rhythm
    Jul 18 '19 at 12:02
  • Maybe "after" can sound a bit informal and "thereafter" maybe something that one will find in biology books.. Jul 18 '19 at 12:41
  • @It'saboutEnglish You're right, but to me "therefore" sounds more natural here.
    – Rhythm
    Jul 18 '19 at 12:48
  • @It'saboutEnglish You've read this?
    – Rhythm
    Jul 18 '19 at 12:51

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