How do taxonomists prove a species is new?

Lens adapted to this topic: Disputes over minimum evidence

The serious dissent concerns the threshold and form of proof, not whether comparison matters. Some taxonomists argue that rapid descriptions based heavily on DNA barcodes, photographs, or limited material can recognize biodiversity sooner. Critics contend that sparse diagnoses may omit information needed to identify, compare, or revise the species reliably, and debate continues over the consequences.

• Some proposals support describing taxa with minimal information, such as a DNA barcode and a photograph, to accelerate species recognition.
• Critics argue that DNA-only or very brief diagnoses provide too little information for future identification and can make taxonomy less useful to later researchers.
• Photograph-based descriptions have been debated as substitutes when type specimens are lost, escaped, or not preserved, with recommendations intended to guide exceptional use.
• Fungal taxonomy also debates descriptions based on single specimens or cultures and the acceptability of DNA-typified species under nomenclatural and editorial standards.
• The alternative position still seeks evidence that a proposed taxon is distinct; it disputes whether conventional breadth of sampling and documentation should always be required.

Featured sourceNew Species Described From Photographs: Yes? No? Sometimes? A Fierce Debate and a New Declaration of the ICZNexa.ai4 sourcesView sources