Karmin et al. 2015 have found a divergent branch of C-M48, which they have named C3c2-B90 and which ISOGG has named C2b1a2b-B90, in three Koryaks and one Evenk. Although the M48 and M77 SNPs have long been considered to be phylogenetically equivalent, marking the same clade of the human Y-DNA phylogeny, the C3c2-B90 clade has been found to be positive for the M48 mutation, but negative for the M77 mutation.
C-B91
C-B91 is a subclade of C-B90 that has been found in Koryaks. It subsumes the C-B92 and C-B94 subclades. Karmin et al. 2015 have found Y-DNA belonging to C-B92 in two Koryaks who they have estimated to share a most recent common ancestor 594 years before present. The two Koryaks in C-B92 have been estimated to share a most recent common ancestor with a Koryak who belongs to the C-B94 subclade 3,812 years before present.
C-B93
C-B93 is a subclade of C-B90 that has been found in 7.7% of a sample of Ulchi and in one Evenk. It has been estimated to share a most recent common ancestor with C-B91 of the Koryaks 4,992 years before present.
C-M77
Karmin et al. 2015 have estimated the coalescence age of C-M77, which they have named C3c1a-M77 and which ISOGG has named C2b1a2a-M86/M77, to be 2,804 years before present based on their three examples of C-B469 and five examples of C-B80 Y-DNA.
C-B469
C-B469 is a subclade of C-M77. Y-DNA that belongs to the C-B469 clade, which has been named C2b1a2a1a-B469 by ISOGG, has been found in a Zakhchin Mongolian, an Evenk, and a Buryat. The Evenk individual and the Buryat individual both belong to the C-B87 subclade and have been estimated to share a most recent common ancestor 1,792 years before present. Those two individuals have been estimated to share a most recent common ancestor with the Zakhchin individual, who belongs to the C-B470 subclade, 2,562 years before present. C-B469 also has been found in HGDP01250, a Y-DNA sample obtained from a Xibo in China as part of the Human Genome Diversity Project, and in an Even from Nelkan, Khabarovsk Krai. Balanovska et al. found C-F13686, a subclade of C-B469 that may be phylogenetically equivalent to C-B87, in 7.7% of a sample of Ulch people. Balinova et al. observed Y-DNA that belongs to C-B469 in 10.1% of a sample of DerbetKalmyks from Russia, 2.5% of a sample of Derbet Mongols from western Mongolia, and 1.7% of a sample of Torgut Kalmyks from Russia.
C-B470
C-B470 is a subclade of C-B469. This subclade has been observed in a Zakhchin and in an Ulch.
C-B87
C-B87 is a subclade of C-B469. The time to most recent common ancestor between C-B87 and C-B470 has been estimated to be 2,562 years before present. C-B87 Y-DNA, which belongs to C-B87 but does not belong to its C-B89 subclade, has been found in a Buryat and in a Xibo.
C-B89
C-B89 is a subclade of C-B87 that is known from the Y-DNA of an Even from Nelkan, Khabarovsk Krai and the Y-DNA of an Evenk.
C-B80
Y-DNA that belongs to this clade, which has been named C2b1a2a1b-B80 by ISOGG, has been found in five Evens. These five Even members of C-B80 have been estimated to share a most recent common ancestor 1,674 years before present.