EDIT

the theme function garland_cichorieae_cdm_taxon_list_thumbnails can be replaced by adding two additional variables to the GallerySettings array:

• captionElements = array('title', '#uri'=>t('open Image'));

• mediaLinkType:

  • NORMAL link to the image page or to the alternativeMediaUri if it is defined instead of

• LIGHTBOX open the link in a light box,

Add according user interface elements to the admin section