> may be wrong) a mashup-error occurring when uncritically combining data from
> different sources, each source being internally consistent and correct. This
> may be something that needs to be addressed by the tool.

Good point, yes. Any ideas how?

Perhaps just help understanding this better, by displaying the sources for the relations shown
 
> The problem with different labels and singular/plural may or may not be a
> tool problem in choosing the correct label

It just takes the label of the item. There is a taxon name property.
Would that be a useful alternative? Input from the experts needed.

That seems helpful. One way would be to always show taxon name first, followed by the - at the moment perhaps inconsistent - language label in Parentheses 
 
Right. It shows the Wikipedia article if there is one in the language
you selected and otherwise Wikidata. Better to always show Wikidata?

perhaps iframe with the mobile-view as it is PLUS 2 normal (quick-) links below, allowing to open the normal-view pages to conveniently analyse/ read etc.

... not sure. Situation at the moment is that when I tried to understand the source of the mashup error, I could not do it with the information or links displays

thanks again

gregor