Hello Fredrik!

 

I think you have to ask András Ambrus about the Leptidea morsei.

Write an e-mail to him: ambrus.andras@gmail.com

 

Or you should ask Zoltán Scherer!

 

Best wishes,

Tamás Baranyi

 

https://www.researchgate.net/publication/273743506_The_distribution_life_cycle_ecology_and_present_status_of_Leptidea_morsei_Fenton_1882_in_Slovenia_with_additional_observations_from_Romania_Lepidoptera_Pieridae

 

I found this sad information: "On the other hand formerly rare butterfly species such as Danube Clouded Yellow – Colias myrmidone (Esper, [1781]) and Fenton’s Wood White – Leptidea morsei major (Grund, 1905) were not recorded during the surveys. These two butterflies could now be considered extinct in Hungary."

https://termeszetvedelmikezeles.hu/wp-content/uploads/2016/12/vedett-allatfajok-elterjedesi-atlasza-2016.pdf