EDIT

 * Wrapps the given $html string into a reder array suitable for drupal_render()

function markup_to_render_array($html, $weight = 0) {

  return array(

          '#markup' => $html,

          '#weight' => $weight,

      );

    $footnoteKeyListStr .= theme('cdm_footnote_key', array('footnoteKey' => $footNoteKey, 'separator' => ($footnoteKeyListStr ? $separator : '')));

      elseif ($node->feature->uuid == UUID_COMMON_NAME) {

        $block->content .= drupal_render($common_names_render_array);

          $block->content .= theme('cdm_descriptionElements', array(

            'descriptionElements' => $node->descriptionElements,

            'feature' => $node->feature,

            'taxon_uuid' => $taxon_uuid,

          ));

          // it is expected hat supordinate features can "contain" TextData,

          // can this be solved by resursively calling this very function?

                    // TODO use theme_cdm_descriptionElementTextData()

          $block->content .= $text;

          $block->content .=  compose_feature_media_gallery($node, $media_list, $gallery_settings);

          /*

           * Footnotes for the feature block

           */

          $block->content .= theme('cdm_footnotes', array('footnoteListKey' => $node->feature->uuid));

          $block->content .= theme('cdm_annotation_footnotes', array('footnoteListKey' => $node->feature->uuid));

        }

            '#children' => $block->content,

      $block->content .= compose_cdm_feature_block_elements(

    $block->content .= $map_render_element['#markup'];

      $block->content .= compose_cdm_feature_block_elements(

      $block->content .= compose_cdm_feature_block_elements(

    $block->content .= theme('cdm_footnotes', array('footnoteListKey' => UUID_DISTRIBUTION));

    $block->content .= theme('cdm_annotation_footnotes', array('footnoteListKey' => UUID_DISTRIBUTION));

  return $out;

  // annotations footnotes.

  $annotation_fkeys = theme('cdm_annotations_as_footnotekeys',

    array(

      'cdmBase_list' => $element,

      'footnote_list_key' => $feature_uuid,

    )

  );

  if (isset($element->sources) && is_array($element->sources) && count($element->sources) > 0) {

      // END CUSTOM CODE (2)

      // ---------------------------------------------------------------------------

      $name_used_in_source_link_to_show = '';

          $name_used_in_source_link_to_show = l(

            'attributes' => array(),

            'absolute' => TRUE,

            'html' => TRUE,

          ));

          $name_used_in_source_link_to_show = $source->nameUsedInSource->titleCache;

        $name_used_in_source_link_to_show = $source->nameUsedInSource->originalNameString;

      // final composition of the TextData element

      // FIXME this should move below after the end if (isset($element->sources) {...} and will replace the else

      if ($asListElement) {

       $out = '<li class="descriptionText DescriptionElement">';

        // Adding ":" if necessary.

        if (!empty($name_used_in_source_link_to_show)) {

          if ( (!empty($description)|| !empty($sourceRefs)) && $feature_uuid != UUID_CHROMOSOMES_NUMBERS) {

            $out .= $name_used_in_source_link_to_show . ': ';

          } else {

            $out .= $name_used_in_source_link_to_show . ' ';

          }

        }

        $out .= $description . $sourceRefs . $annotation_fkeys . '</li>';

      }

      else {

        if ($name_used_in_source_link_to_show) {

          $name_used_in_source_link_to_show = ' (name in source: ' . $name_used_in_source_link_to_show . ')';

        }

        $out = '<span class="DescriptionElement DescriptionElement-'. $element->class . '

        ' .  html_class_attribute_ref($element)  . '">'

          . $description . $sourceRefs . $name_used_in_source_link_to_show . $annotation_fkeys . '</span>';

  } // END of if (isset($element->sources)

    // If no sources, print the description.

    $out = '<span class="' . html_class_attribute_ref($element) . '"> '

      . $description . $annotation_fkeys . '</span>';

function compose_cdm_common_names($elements, $feature) {

    $common_name_out .= compose_cdm_feature_block_elements(

        $common_name_feature_elements,

        $feature,

        '; ',

        FALSE,

        'div'

    .'<div class="common_names_as_text_data">' . $common_name_out_text_data . '</div>'

    .$footnotes

 * @param array $variables

 *   An associative array containing:

 *   - array of descriptionElements which belong to the same feature.

 *     These descriptions elements of a Description must be ordered by the chosen feature tree by

 *     calling the function _mergeFeatureTreeDescriptions().

 *     @see _mergeFeatureTreeDescriptions()

 *   - featureUuid: currently unused, according code disabled

 *   - taxon_uuid: only used for ordered distributions (will be removed!)

 * @ingroup themeable

function theme_cdm_descriptionElements($variables) {

  $descriptionElements = $variables['descriptionElements'];

  $feature = $variables['feature'];

  $taxon_uuid = $variables['taxon_uuid'];

  $sortOutArray = FALSE;

  $distributionElements = array();

  $distribution_tree = null;

  $out = compose_cdm_feature_block_elements(

  return $out;

      // Themes in help.php.

      'cdm_dataportal_admin_config_cdm_dataportal_general' => array('variables' => array()),

      'cdm_dataportal_admin_config_cdm_dataportal_geo' => array('variables' => array()),

      'cdm_dataportal_admin_config_cdm_dataportal_layout' => array('variables' => array()),

      'cdm_dataportal_admin_config_cdm_dataportal_cachesite' => array('variables' => array()),

      'cdm_dataportal_admin_config_more_help_link' => array('variables' => array()),

      // Themes in settings.php.

      'checkboxes_preferred' => array('render element' => 'element'),

      'radio_options_suffix' => array('render element' => 'element'),

      // Themes in cdm_dataportal.common.theme.

      'cdm_taggedtext2html' => array('variables' => array(

          'taggedtxt' => array(),

          'tag' => 'span',

          'glue' => ' ',

          'skiptags' => array(),

      )),

      'cdm_annotations_as_footnotekeys' => array('variables' => array('cdmBase_list' => NULL, 'footnote_list_key' => NULL)),

      'cdm_annotation_footnotes' => array('variables' => array('footnoteListKey' => NULL, 'enclosingTag' => 'span')),

      'cdm_annotation_content' => array('variables' => array('AnnotationTO' => NULL)),

      'cdm_list_of_annotations' => array('variables' => array('annotationElements' => NULL)),

      'cdm_footnote_key' => array('variables' => array(

          'footnoteKey' => NULL,

          'separator' => '',

          'highlightable' => TRUE,

          'separator_off' => FALSE,

      )),

      'cdm_footnote' => array('variables' => array('footnoteKey' => NULL, 'footnoteText' => NULL, 'enclosing_tag' => 'span')),

      'cdm_footnotes' => array('variables' => array(

          'footnoteListKey' => NULL,

          'enclosingTag' => 'span',

      )),

      'cdm_annotations' => array('variables' => array('annotations' => NULL, 'enclosingTag' => 'span')),

      'cdm_marker' => array('variables' => array('label' => NULL, 'attributes' => NULL)),

      'cdm_pager' => array('variables' => array('pager' => NULL, 'path' => NULL, 'parameters' => NULL)),

      'cdm_pager_link' => array('variables' => array(

          'text' => NULL,

          'linkIndex' => NULL,

          'pager' => NULL,

          'path' => NULL,

          'parameters' => array(),

          'attributes' => NULL,

      )),

      'cdm_back_to_search_result_button' => array('variables' => array()),

      'cdm_back_to_image_gallery_button' => array('variables' => array()),

      'cdm_print_button' => array('variables' => array()),

      // Themes in cdm_dataportal.descriptions.theme.

      'cdm_feature_name' => array('variables' => array('feature_name' => NULL)),

      'FeatureTree_hierarchy' => array('variables' => array('FeatureTreeUuid' => NULL)),

      'FeatureTree_hierarchy_children' => array('variables' => array('node' => NULL)),

      'cdm_descriptionElement_CategoricalData' => array('render element' => 'element'),

      'cdm_descriptionElement_IndividualsAssociation' => array('render element' => 'element'),

      'cdm_descriptionElement_TaxonInteraction' => array('render element' => 'element'),

      'cdm_descriptionElement_QuantitativeData' => array('render element' => 'element'),

      'cdm_descriptionElementTextData' => array('variables' => array(

          'element' => NULL,

          'asListElement' => NULL,

          'feature_uuid' => NULL,

      )),

      'cdm_common_names' => array('render element' => 'elements', 'variables' => array('feature' => null) ),

      'cdm_descriptionElements' => array('variables' => array(

          'descriptionElements' => NULL,

          'feature' => NULL,

          'taxon_uuid' => NULL,

      )),

      'cdm_description_element_image_source' => array('variables' => array(

          'image_sources' => NULL,

          'asListElement' => NULL,

      )),

      'cdm_descriptionElement_Distribution' => array('variables' => array(

          'descriptionElements' => NULL,

          'enclosingTag' => 'span',

      )),

      'cdm_description_ordered_distributions' => array('variables' => array(

          'distribution_tree' => NULL,

      )),

      'cdm_IdentificationKey' => array('variables' => array(

          'identificationKey' => NULL,

          'doLinkToKeyPage' => TRUE,

          'showIdentificationKeyTitle' => TRUE,

      )),

      'cdm_polytomousKey' => array('variables' => array('polytomousKey' => NULL)),

      'cdm_polytomousKey_linkedStyle_subgraph' => array('variables' => array('polytomousKeyNode' => NULL)),

      'cdm_poytomousKeyNode_modifyingText' => array('variables' => array('modifyingText' => NULL)),

      'cdm_list_IdentificationKeys' => array('variables' => array('type' => NULL, 'taxonUuid' => NULL)),

      'cdm_block_IdentificationKeys' => array('variables' => array('taxonUuid' => NULL)),

      'cdm_UseDescription' => array('variables' => array('description' => NULL, 'taxonUuid' => NULL)),

      'cdm_block_Uses' => array('variables' => array('taxonUuid' => NULL)),

      // Themes in cdm_dataportal.media.theme.

      'cdm_media' => array('variables' => array('descriptionElement' => NULL, 'mimeTypePreference' => NULL)),

      'cdm_mediaTypeTerm' => array('variables' => array('feature' => NULL, 'mediaUrl' => FALSE)),

      'cdm_media_mime_application' => array('variables' => array('mediaRepresentation' => NULL, 'feature' => NULL)),

      'cdm_media_mime_image' => array('variables' => array('mediaRepresentation' => NULL, 'feature' => NULL)),

      'cdm_media_mime_text' => array('variables' => array('representation' => NULL, 'feature' => NULL)),

      'cdm_media_caption' => array('variables' => array(

          'media' => NULL,

          'elements' => array('title', 'description', 'artist', 'location', 'rights'),

      )),

      'cdm_media_gallerie' => array('variables' => array(

          'mediaList' => NULL,

          'galleryName' => NULL,

          'maxExtend' => 150,

          'cols' => 4,

          'maxRows' => FALSE,

          'captionElements' => array('title'),

          'mediaLinkType' => 'LIGHTBOX',

          'alternativeMediaUri' => NULL,

          'galleryLinkUri' => NULL,

          'showCaption' => TRUE,

      )),

      'cdm_media_gallerie_image' => array('variables' => array(

          'mediaRepresentationPart' => NULL,

          'maxExtend' => NULL,

          'addPassePartout' => FALSE,

          'attributes' => NULL,

      )),

      'cdm_media_gallerie_application' => array('variables' => array(

          'mediaRepresentationPart' => NULL,

          'maxExtend' => NULL,

          'addPassePartout' => FALSE,

          'attributes' => NULL,

      )),

      'cdm_media_gallerie_text' => array('variables' => array(

          'mediaRepresentationPart' => NULL,

          'maxExtend' => NULL,

          'addPassePartout' => FALSE,

          'attributes' => NULL,

      )),

      'cdm_openlayers_image' => array('variables' => array('mediaRepresentationPart' => NULL, 'maxExtend' => NULL)),

      // Themes in cdm_dataportal.name.theme.

      'cdm_taxonName' => array('variables' => array(

          'taxonName' => NULL,

          'nameLink' => NULL,

          'refenceLink' => NULL,

          'show_annotations' => TRUE,

          'is_type_designation' => FALSE,

          'skiptags' => array(),

      )),

      'cdm_typedesignations' => array('variables' => array('typeDesignations' => array())),

      'cdm_nameRelationships' => array('variables' => array('nameRelationships' => NULL, 'skipTypes' => FALSE)),

      'cdm_homotypicSynonymLine' => array('variables' => array('taxon' => NULL)),

      'cdm_heterotypicSynonymyGroup' => array('variables' => array('homotypicalGroup' => NULL)),

      'cdm_homotypicSynonymyGroup' => array('variables' => array(

          'synonymList' => NULL,

          'accepted_taxon_name_uuid' => NULL,

          'prependedSynonyms' => array(),

      )),

      'get_nameRenderTemplate' => array('variables' => array()),

      'get_partDefinition' => array('variables' => array()),

      // Themes in cdm_dataportal.occurrence.theme.

      'cdm_specimen' => array('variables' => array('specimenTypeDesignation' => NULL)),

      // Themes in cdm_dataportal.page.theme.

      'cdm_taxon_page_title' => array('variables' => array('taxon' => NULL)),

      'cdm_name_page_title' => array('variables' => array('taxon_name' => NULL)),

      'cdm_taxon_page_synonymy' => array('variables' => array('taxon' => NULL, 'addAcceptedTaxon' => NULL)),

      'cdm_reference_page' => array('variables' => array('reference' => NULL)),

      'cdm_media_page' => array('variables' => array(

          'media' => NULL,

          'mediarepresentation_uuid' => FALSE,

          'partId' => FALSE,

      )),

      'cdm_polytomousKey_page' => array('variables' => array('polytomousKey' => NULL)),

      'cdm_taxonpage_tab' => array('variables' => array('tabname' => NULL)),

      // Themes in cdm_dataportal.references.theme.

      'cdm_reference_pager' => array('variables' => array(

          'referencePager' => NULL,

          'path' => NULL,

          'parameters' => array(),

      )),

      'cdm_reference' => array('variables' => array(

          'reference' => NULL,

          'microReference' => NULL,

          'doLink' => FALSE,

          'referenceStyle' => NULL,

      )),

      'cdm_OriginalSource' => array('variables' => array('source' => NULL, 'doLink' => TRUE)),

      // Themes in cdm_dataportal.taxon.theme.

      'cdm_search_results' => array('variables' => array(

          'pager' => NULL,

          'path' => NULL

      )),

      'cdm_taxonRelationships' => array('variables' => array('taxonRelationships' => NULL, 'focusedTaxon' => NULL)),

      'cdm_acceptedFor' => array('variables' => array('acceptedFor' => NULL)),

      'cdm_list_of_taxa' => array('variables' => array('records' => NULL, 'freetextSearchResults' => array(), 'show_classification' => FALSE)),

      'cdm_taxon_list_thumbnails' => array('variables' => array('taxon' => NULL)),

      // Themes in cdm_dataportal.bibliography.theme.

      'cdm_descriptionElementBibliography' => array('variables' => array('descriptionElementsBibliography' => array())),

      // Themes in includes/pre-drupal8.inc

      'description_list' => array('variables' => array('items' => array(), 'groups' => array(), 'title' => NULL, 'attributes' => array())),

            $block->content .= compose_cdm_feature_block_elements(

            $block->content .= compose_cdm_feature_block_elements(

            $block->content .= compose_cdm_feature_block_elements(

          $block->content .= theme('cdm_descriptionElements', array(

            'descriptionElements' => $node->descriptionElements,

            'featureUuid' => $node->feature->uuid,

            'taxon_uuid' => $taxon->uuid,

          ));