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Cryptic diversity begets challenges and opportunities in biodiversity research
Rui Cheng1, Arong Luo1, Michael Orr1,2
1Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
Integrative Zoology
|January 24, 2024
Summary
Cryptic species, or hidden biodiversity, are widespread and numerous. Molecular tools aid in their discovery, highlighting the need for integrated taxonomy and increased funding to fully understand Earth's species.
Area of Science:
- Biodiversity Science
- Evolutionary Biology
- Taxonomy
Background:
- Estimates suggest Earth may host 2.2 billion species, with significant cryptic diversity within described species.
- Cryptic species, morphologically similar but genetically distinct, are increasingly recognized due to molecular advancements.
- Understanding cryptic biodiversity is crucial for a complete inventory of life on Earth.
Purpose of the Study:
- To introduce the concept and evolutionary processes of cryptic species.
- To outline methods for discovering and confirming cryptic species.
- To provide guidance for studying hidden biodiversity and standardize taxonomic decisions.
Main Methods:
- Review of molecular species delimitation techniques.
- Discussion of evolutionary pathways leading to cryptic speciation.
- Proposal of a workflow for confirming cryptic species.
Main Results:
- Molecular methods have revealed extensive cryptic species, particularly in hyperdiverse groups.
- Integrated taxonomy, using multiple lines of evidence, is essential for reliable species delimitation.
- A workflow is presented to systematically confirm cryptic species.
Conclusions:
- Cryptic biodiversity is a significant component of Earth's biota, necessitating focused research.
- Increased funding and attention to cryptic species are vital for advancing taxonomy.
- Further study of cryptic species will elucidate the evolution and maintenance of biodiversity.
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