The location of NO1 at the SNP M214 follows the taxonomy set out by Karmin et al. 2022,[9] and conforms to a structure shown by ISOGG (2022).

[8] (However neither Karmin nor ISOGG has integrated one of the findings of Poznik et al. 2016:[6] that there was a subclade generation both above haplogroup NO1 (M214) and beneath K-M2308.

[6] This demonstrated conclusively that multiple stages of development separated K2a from NO, which therefore constituted "grandparent" and "grandchild" clades.

[6][1] Two sets of ancient remains previously considered as possibly belonging to NO have since been reclassified upstream to K2a.

[citation needed] Likewise, cases previously regarded as possible examples of NO* or NO1*, and since ruled out, include: This phylogeny of haplogroups K2a, K2a1, and NO is based on YFull 2018,[1] Poznik 2016, ISOGG 2018, Karafet 2008.