A familiar barcode can miss much of the species structure in a sponge genus
WHAT THE EVIDENCE SAYS
Researchers combined 192 Oscarella specimens, five genetic markers and standardized photographic documentation. Multigene analyses supported four species new to science and highlighted weak resolution in the commonly used COI marker, along with broader gaps in genetic reference data and geographic coverage.
WHY IT MATTERS / OUR READ
Monitoring is only as good as the taxonomic reference behind it. A convenient marker can under-resolve real diversity, which matters when eDNA, barcoding and biodiversity assessments assume the reference library already captures the organisms present.
CAVEATS / UNCERTAINTY
This is one morphologically difficult sponge genus in the Western Mediterranean. The limits of COI here should not be generalized unchanged to every taxon or metabarcoding application.
SOURCE
Scientific Reports — primary study
View original evidence ↗
Five genetic markers plus systematic photographs of 192 Western Mediterranean Oscarella specimens resolved four species new to science and exposed low resolution in the commonly used COI marker.
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