International Association of Astacology, of which I am a member! Always read the newsletters of your professional societies, citizens!
I have updated the map of Marmorkrebs introductions with this record, and others (more recent – hadn’t missed them,. just hadn’t added them) in the Czech republic.
Patoka J, Buric M, Kolár V, Bláha M, Petrtýl M, Franta P, Tropek R, Kalous L,
Petrusek A, Kouba A. 2016. Predictions of marbled crayfish establishment in
conurbations fulfilled: evidences from the Czech Republic. Biologia
71(12): 1380–1385. https://doi.org/10.1515/biolog-2016-0164
Samardžić M, Lucić A, Maguire I, Hudina S. 2014. The first record of the marbled crayfish (Procambarus fallax (Hagen, 1870) f. virginalis) in Croatia. Crayfish News 36(4): 4. http://www.freshwatercrayfish.org/docs/cn/CrayfishNews_36(4)_hr.pdf