different between subcohort vs infracohort

English

sub- +? cohort

subcohort (plural subcohorts)

infra- +? cohort

infracohort (plural infracohorts)

(taxonomy) one of the ranks used in classifying animal life forms; an infracohort is more specific than a subcohort and more general than a subtercohort
- 2004, New Scientist, 11 Sep 2004, p.13:
  taxonomists have been inventing a confusing raft of ranks, such as phalanxes, infracohorts and supertribes

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