EDIT

Katja Luther wrote:

Are there any special fields for fungi or viruses?

Please refere to the according interfaces (IViralName, IFungusName, ...) to adapt the UI properly.

if the name once is set to viral, the getTaggedName method returns always null.

else if (nonViralName.getNameType().isViral()){
            return null;
        }

we should remove the viral nomanclatural code to avoid this, because at the moment everything is based on INonViralName.

java.lang.NullPointerException
    at java.util.ArrayList.addAll(Unknown Source)
    at eu.etaxonomy.cdm.strategy.cache.name.TaxonNameDefaultCacheStrategy.getTaggedTitle(TaxonNameDefaultCacheStrategy.java:410)
    at eu.etaxonomy.cdm.strategy.cache.name.NameCacheStrategyBase.getTitleCache(NameCacheStrategyBase.java:150)
    at eu.etaxonomy.cdm.strategy.cache.name.NameCacheStrategyBase.getTitleCache(NameCacheStrategyBase.java:145)
    at eu.etaxonomy.cdm.strategy.cache.name.NameCacheStrategyBase.getTitleCache(NameCacheStrategyBase.java:1)
    at eu.etaxonomy.cdm.model.common.IdentifiableEntity.generateTitle(IdentifiableEntity.java:570)
    at eu.etaxonomy.cdm.model.common.IdentifiableEntity.getTitleCache(IdentifiableEntity.java:210)
    at eu.etaxonomy.cdm.model.name.TaxonName.getTitleCache(TaxonName.java:1446)
    at eu.etaxonomy.taxeditor.ui.section.AbstractCdmDetailSection.setSectionTitle(AbstractCdmDetailSection.java:149)
    at eu.etaxonomy.taxeditor.ui.section.AbstractCdmDetailSection.updateTitle(AbstractCdmDetailSection.java:169)
    at eu.etaxonomy.taxeditor.ui.section.AbstractCdmDetailElement.updateParentSection(AbstractCdmDetailElement.java:252)
    at eu.etaxonomy.taxeditor.ui.section.AbstractCdmDetailElement.handleTitleCacheRelevantChange(AbstractCdmDetailElement.java:244)
    at eu.etaxonomy.taxeditor.ui.section.AbstractCdmDetailElement.propertyChange(AbstractCdmDetailElement.java:210)
    at eu.etaxonomy.taxeditor.ui.element.AbstractCdmFormElement.firePropertyChangeEvent(AbstractCdmFormElement.java:235)
    at eu.etaxonomy.taxeditor.ui.element.AbstractCdmFormElement.firePropertyChangeEvent(AbstractCdmFormElement.java:263)
    at eu.etaxonomy.taxeditor.ui.section.AbstractCdmDetailElement.propertyChange(AbstractCdmDetailElement.java:229)
    at eu.etaxonomy.taxeditor.ui.element.AbstractCdmFormElement.firePropertyChangeEvent(AbstractCdmFormElement.java:235)
    at eu.etaxonomy.taxeditor.ui.combo.EnumComboElement.widgetSelected(EnumComboElement.java:184)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:249)

Is there a difference between this ticket and #6693 or is it a duplicate?