[Seaplaner]

From the article, my quick perusal did not catch whether the authors are referring to K1 or k2 (there is a huge difference, and many feel that they shouldn't be considered relatives even though there are some structural similarities.)

I suspect it's K2, as here is a related article...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8308377/

[laplata]

Thank you!