"Although long known as Syrinx aruanus, this combination is grammatically incorrect. The Greek word syrinx (a pipe) is feminine and thus the specific epithet, which in this case is an adjective derived from the Aru Islands and meaning the Aruanan Syrinx, must agree in gender with the genus name. Hence Syrinx aruana is the grammatically correct name. When he proposed the genus name Syrinx, Röding himself used the combination Syrinx aruana (and all the other specific epithets he combined with Syrinx were also feminine). This is a mandatory change following Art. 34.2 of the ICZN Code."
https://www.molluscabase.org/aphia.php?p=taxdetails&id=527732
Unintended disagreements occur when a parent (B) is
thinned by swapping a child (E) to another part of the
taxonomic tree, resulting in existing IDs of the parent being interpreted
as disagreements with existing IDs of the swapped child.
Identification
ID 2 of taxon E will be an unintended disagreement with ID 1 of taxon B after the taxon swap
If thinning a parent results in more than 10 unintended disagreements, you
should split the parent after swapping the child to replace existing IDs
of the parent (B) with IDs that don't disagree.
