EDIT

Currently it is according to vocabulary (which is ordered alphabetically on same levels but ofcourse not for subareas) and therefore not correct for fallback areas.

Example for incorrect order: Urtica dioica http://www.europlusmed.org/cdm_dataportal/taxon/38a24b86-06a8-4ec6-962a-b816db7c7a67

Ag Al Au(A L) Be(L) Br Bu By Co Cs Ct Cy Da Fa Fe Ga(C F) Ge Gr Hb(E N) He Ho Hs(A S) Hu Ir Is It Le Li Lu Ma Mk Mo No Po Rf(C CS E K N NW S) Rm Sa Si(S) Sk Sl Su Sy Tn Tu(A E) Cm Uk Sr Ab(A) Ar Gg Cg Es La Lt

on Test: Sy Tu(A E) Tn Uk(Cm U) Es Lt La Ab(A) Ar Gg Cg Sr https://test.e-taxonomy.eu/dataportal/preview/euromed/cdm_dataportal/taxon/38a24b86-06a8-4ec6-962a-b816db7c7a67