552/551, the Marmosarubra, is a superparticular comma. It was first described and documented by Douglas Blumeyer in 2021, and later renamed at his request in 2023. The new name references the red mouse opossum, Marmosa rubra, species no. 552551 in the Integrated Taxonomic Information System (ITIS).

Interval information
Ratio 552/551
Subgroup monzo 2.3.19.23.29 [3 1 -1 1 -1
Size in cents 3.139138¢
Name Marmosarubra
FJS name [math]\displaystyle{ \text{d}{-2}^{23}_{19,29} }[/math]
Special properties superparticular,
reduced
Tenney norm (log2 nd) 18.2144
Weil norm (log2 max(n, d)) 18.217
Wilson norm (sopfr(nd)) 80
Comma size unnoticeable
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