This branch is defined by the Y-Haplotree at FamilyTreeDNA as E-M215. There, it is the child of the E-P2 branch.
M215, CTS10513, CTS10637, CTS10679, CTS225, CTS2591, CTS3988, CTS5530, CTS5792, CTS6953, CTS8033, CTS8586, CTS9017, CTS9049, L336, L676, M243, M5090, PF1537, PF1538, PF1540, PF1570, PF1571, PF1572, PF1807, PF1818, PF1826, PF1831, PF1929, Y2546
This branch is defined by YFull as E-M215. There, it is the child of the E-M21 branch.
PF1471, PF1479, PF1466, Y2484, PF1598, PF1475, CTS1298, CTS1682, CTS3126, CTS6425, CTS12717, L336, CTS9049, CTS2727, PF1560, L676, CTS8033, CTS10679, PF1908, CTS9017, PF1570, PF1537, PF1807, CTS5530, CTS6848, CTS6953, CTS10637, CTS8479, PF1818, CTS4440, PF1586, PF1538, M243, CTS7511, CTS5999, PF1533, M5090, CTS5634, PF1912, PF1529, CTS3988, PF1826, CTS1463, CTS8586, CTS10365, PF1457, PF1609, PF1492, Y2507, PF1460, CTS2050, Y5055, PF1458, PF1571, PF1802, CTS12090, Y2483, PF1484, PF1615, Y2508, Y2479, Y2504, PF1499, PF1812, CTS958, CTS5111, CTS4345, PF1832, PF1824, S13699, CTS10605, CTS5438, Y2518, PF1829, CTS6537, L789, PF1921, CTS5644, Y2848, Y2502, Y2548, FGC77197, CTS1009, CTS6041, CTS2591, PF1820, CTS9174, Y2489, Y2500, CTS12281, PF1597, CTS7554, CTS3281, PF1568, Y2532, PF1574, CTS5792, PF1572, CTS3987, PF1540, CTS3495, M215, CTS9616, CTS2284, CTS11273, PF1804, CTS1327, PF1487, CTS7816, CTS8103, CTS4819, CTS6774, PF1454, PF1600, Y2492, PF1605, CTS8461, PF1498, CTS4875, PF1866, CTS2372, CTS3196, PF1474, Y2487, CTS11344, CTS6122, Y2539_1, CTS8910, CTS5237, PF1890, PF1800, CTS19, PF1872, CTS225, PF1569, L930, PF1831, Y2533, PF1488, PF1614, PF1937, CTS10513, PF1481, CTS9644, PF1929, CTS7909, CTS8918, M5740, Y2539_2
Peer reviewed sources have not been added for this branch yet. If you know of one I have missed, please link to it in the comments.