EDIT

Currently only protologe media with the following mime types is displayed:

                   'application/pdf',
                  'image/png',
                  'image/jpeg',
                  'image/gif',
                  'text/html',

This is due to the filtering for preferred mime types which takes place in theme_cdm_taxonName()

possible solutions:

1. remove preference filter

2. second request without filter or directly take the media representation from the name description element if available

see also #3362, #2452, #3630, #3631