The Cadlina jannanicholsae is a newly described species that further complicates identifying ‘Yellow-edged Cadlinas.” In the past few years several new Cadlinas have been added to the “Cadlina luteomarginata” complex and photographs are often inadequate in determining the exact species. Janna’s Cadlina does have noticeably larger flower-like tubercles, a substantive yellow margin and lacks the yellow or white ring spots that are found at the edge of Cadlina klasmalmbergi and Cadlina sylviaearleae.
If you want to delve into the recent research regarding this complex, check out the details in The Emperor’s Cadlina.