Overcoming taxonomic anxiety in conservation: A roadmap from the idle crayfish case

Abstract Advances in taxonomy often uncover cryptic species nested within already protected taxa, raising concerns about the continuity of legal safeguards. While newly described species are not necessarily disconnected from existing protections, often being treated administratively as part of the original species complex, formal legislative updates remain essential to avoid confusion and ensure clarity. This tension, sometimes referred to as taxonomic anxiety, challenges researchers to balance scientific progress with conservation certainty. Using the case of the Idle Crayfish ( Austropotamobius bihariensis ), an endemic species recently described in Romania, we demonstrate how robust scientific evidence, coordinated stakeholder engagement, and strategic communication enabled full legal recognition. We propose an actionable roadmap for integrating taxonomic advances into conservation policy, offering a replicable model for ensuring legal protection of newly recognized species worldwide. While our case study focuses on the EU Habitats Directive framework, the challenges and solutions we present are relevant to conservation policy systems globally.