Complex sentence: Only preliminary research has been done on butterflies and moths (lepidopterans) in Cambodia, even though it is an abundant lifeform in the country, and no identification literature exists for Cambodia on this group yet.
Split into simpler sentences: Only preliminary research has been done on butterflies and moths (lepidopterans) in Cambodia, even though it is an abundant lifeform in the country. No identification literature exists for Cambodia on this group yet.