The Loupekine snarks are the two snarks on 22 vertices and 33 edges illustrated above. They are implemented in the Wolfram Language as GraphData["LoupekineSnark1"] and GraphData["LoupekineSnark2"], respectively.
The Loupekine snarks were found independently in the embeddings shown above by Collier and Schmeichel (1978) who erroneously characterized them as "two new cubic hypohamiltonian graphs."
The Loupekine snarks are platypus graphs.
