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    "headline": "Fossil treasure map shows where unknown sea creatures may be hiding; 540 million years of finds charted",
    "description": "A fossil treasure map by LMU Munich and Vienna paleontologists charts 540 million years of sea fossils and flags the last 66 million as richest in gaps.",
    "datePublished": "2026-11-14T12:24:00+00:00",
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    "articleSection": "Science",
    "keywords": "Cenozoic, LMU Munich, Natural History Museum Vienna, Paleobiology Database",
    "articleBody": "Two paleontologists have charted every known fossil find of shallow-sea animals from the past 540 million years and marked, for the first time, the places on the world map where that record goes blank. Their verdict: the biggest unclaimed haul lies in the most recent 66 million years, not in the deep past. Thomas A. Neubauer of LMU Munich and the Bavarian State Collections of Natural History, working with Mathias Harzhauser of the Natural History Museum in Vienna, published the analysis in Science Advances on September 23, 2026, under the title “Staking out the frontiers: the limits of the metazoan shallow marine fossil record.” Metazoan simply means animal. How 540 million years of finds were mapped The pair drew on the Paleobiology Database, a free online catalog of fossil animals, plants and microbes that grew out of a marine fossil project launched in 1998 and is now housed at the University of Wisconsin-Madison. They plotted every shallow-water marine area through Earth’s history that holds recorded fossils. They then did something less obvious. For each region, they measured how quickly research has actually turned up new information over past decades and centuries. A region where each new dig still adds a lot is far from exhausted; one where returns have flattened has probably given up most of its secrets. Finally, they checked those results against a geology database of rock layers, because a gap only matters if the right rocks are exposed at the surface where someone can reach them. Why the age of dinosaurs is nearly tapped out The analysis found that two long stretches are already well studied: the Paleozoic, roughly 539 to 252 million years ago, and the Mesozoic, roughly 252 to 66 million years ago. Neubauer and Harzhauser do not expect fossil finds from those intervals to add much new information soon. The surprise is the Cenozoic Era, which began 66 million years ago, after the asteroid impact that ended the dinosaurs. It already has a rich fossil record, yet the models suggest many more finds are still waiting in its shallow-sea deposits. The release highlights the Middle Miocene, about 15 million years ago, as one period with comparatively few finds and high potential. Put another way: the most recent 66 million years make up about 12 percent of the 540-million-year span the study covers, yet that slice is where the authors expect the largest share of new discoveries. “The fact that many regions of the Earth remain unexplored offers hope for valuable new discoveries,” Neubauer said in the LMU release. He added that the work offers “a valuable guide for planning future projects and excavation campaigns.” What a database-driven map can miss The map is only as good as the database behind it. The Paleobiology Database holds a large portion of published fossil data, but not all of it, and its coverage leans toward regions with long histories of well-funded research. Critics have also flagged errors in some of its entries, such as overstated age ranges for several mammal families. The study covers animals from shallow seas only, so it says nothing direct about dinosaurs on land, plants or deep-ocean life. It also predicts where finds are likely, not where they are certain. Digging remains slow and expensive, which is exactly why the authors frame the map as a way to prioritize. Recent fossil stories on Badiyaa show how much the seas still hold, from Gerrothorax maritimus, the first fully marine amphibian, found in 237-million-year-old rock in China, to evidence that spiders’ silk-spinning relatives lived 380 million years ago. The authors say the same priorities apply indoors: museum drawers already hold specimens from many of these gap regions, awaiting study before anyone picks up a shovel. Further reading Wikipedia: Paleobiology Database Science Advances (2026): Staking out the frontiers Image: Michael Hermann, CC BY-SA 4.0 via Wikimedia Commons This article was produced with AI assistance and reviewed by our Editorial Desk. How we work.",
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