Evidence map›Paper›PMID 34669480›Full record

ArticleScience advances2021

Crab in amber reveals an early colonization of nonmarine environments during the Cretaceous.

Javier Luque, Lida Xing, Derek E G Briggs, Elizabeth G Clark, Alex Duque, Junbo Hui, Huijuan Mai, Ryan C McKellar

Abstract read
In one paragraph

Article in Science advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed.

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  5. Group mating in Cretaceous water striders.Proceedings. Biological sciences · 2024
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Javier LuqueMuseum of Comparative Zoology and Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford Street, Cambridge, MA 02138, USA.ORCID 0000-0002-4391-5951
Lida XingState Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China.ORCID 0000-0003-3923-9206
Derek E G BriggsDepartment of Earth and Planetary Sciences, Yale University, New Haven, CT 06520-8109, USA.ORCID 0000-0003-0649-6417
Elizabeth G ClarkDepartment of Earth and Planetary Sciences, Yale University, New Haven, CT 06520-8109, USA.ORCID 0000-0003-4289-6370
Alex DuqueComputer Animation and Visual Effects, College of Communication and Design, Lynn University, 2601 North Military Trail, Boca Raton, FL 33431, USA.
Junbo HuiLongyin Amber Museum, Xishan District, Kunming 650228, Yunnan, China.ORCID 0000-0002-6321-444X
Huijuan MaiYunnan Key Laboratory for Palaeobiology, Yunnan University, Kunming 650091, Yunnan, China.ORCID 0000-0002-3157-263X
Ryan C McKellarRoyal Saskatchewan Museum, Regina, SK S4P 4W7, Canada.ORCID 0000-0002-7451-4368

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Amber fossils provide snapshots of the anatomy, biology, and ecology of extinct organisms that are otherwise inaccessible. The best-known fossils in amber are terrestrial arthropods—principally insects—whereas aquatic organisms are rarely represented. Here, we present the first record of true crabs (Brachyura) in amber—from the Cretaceous of Myanmar [~100 to 99 million years (Ma)]. The new fossil preserves large compound eyes, delicate mouthparts, and even gills. This modern-looking crab is nested within crown Eubrachyura, or “higher” true crabs, which includes the majority of brachyuran species living today. The fossil appears to have been trapped in a brackish or freshwater setting near a coastal to fluvio-estuarine environment, bridging the gap between the predicted molecular divergence of nonmarine crabs (~130 Ma) and their younger fossil record (latest Cretaceous and Paleogene, ~75 to 50 Ma) while providing a reliable calibration point for molecular divergence time estimates for higher crown eubrachyurans.

Identifiers

PMID34669480
PMCPMC8528423

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.