EDIT

    $gallery_settings = getGallerySettings(CDM_DATAPORTAL_DESCRIPTION_GALLERY_NAME);

    // Create a drupal block for each feature

    foreach ($mergedFeatureNodes as $node) {

      if ((isset($node->descriptionElements['#type']) ||

          has_feature_node_description_elements($node)) && $node->feature->uuid != UUID_IMAGE) { // skip empty or suppressed features

        $feature_name = cdm_term_representation($node->feature, 'Unnamed Feature');

        $feature_block_settings = get_feature_block_settings($node->feature->uuid);

        $block = feature_block($feature_name, $node->feature);

        $block->content = array();

          cdm_toc_list_add_item(cdm_term_representation($node->feature), $node->feature->uuid);

        } // END: skip empty block content

      } // END: skip empty or suppressed features

    } // END: creating a block per feature

    drupal_alter('cdm_feature_node_blocks', $block_list, $taxon);

    return _block_get_renderable_array($block_list);