Arcturus clan
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These are rank-2 temperaments that temper out the Arcturus comma, 15625/15309 = [0 -7 6 -1⟩.
Temperaments dicussed elsewhere include the "yes-twos" temperaments opossum, crepuscular, catalan, bunya, bohpier, and superkleismic.
Arcturus
Subgroup: 3.5.7
Comma list: 15625/15309
Sval mapping: [⟨1 0 -7], ⟨0 1 6]]
Sval mapping generators: ~3, ~5
POTE generator: ~5/3 = 878.042
Optimal ET sequence: b2, b11, b13
Polturus
This extension of Arcturus adds Polaris's mapping for 11/9, mapping it to 5 generators down.
Subgroup: 3.5.7.11
Comma list: 15625/15309, 177147/171875
Gencom: [3/1 5/3; 15625/15309 177147/171875]
Mapping: [⟨1 1 -1 5], ⟨0 1 6 -6]]
POTE generator: ~5/3 = 884.268
EDTs: 15, 13[+11], 28[+11], 43[+7, +11]