What type of study is this?

This is a Phylogeography study (also classified as: Observational).

September 10, 2025BMC Ecology and EvolutionOpen Access

The sandfish identity: phylogeographic reconstructions uncover a species complex within the Indo-Pacific distribution of Holothuria (Metriatyla) scabra

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Phylogeographic analysis reveals a species complex in Holothuria scabra, suggesting implications for taxonomy and conservation.

The study identifies a species complex in Holothuria scabra, revealing significant intraspecific diversity.
Using genome-wide and mitochondrial data, genetic evaluations show a minimum of 7 operational taxonomic units in the Indo-Pacific.
Phylogeographic reconstructions indicate divergence of H. scabra dates back to the early Pliocene, around 4.36 million years ago.
These findings challenge previous reliance on morphological traits for species identification within this ecologically important group.

Brown et al. (2025) studied this question.

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