Polar-Cats ...

... play a central role in:

1. From Modular Decomposition Trees to Level-1 networks: Pseudo-Cographs, Polar-Cats and Prime Polar-Cats
   M. Hellmuth, G.E. Scholz
   Discr. Appl. Math, 321, 179-219, 2022
   [publisher's page] [arXiv]
2. Resolving Prime Modules: The Structure of Pseudo-cographs and Galled-Tree Explainable Graphs
   M. Hellmuth, G.E. Scholz
   Discrete Appl Math, 343, 25-43, 2024
   [publisher's page] [arXiv]

But should not be confused with their living counterparts: