Project 4044: J. Luque, L. Xing, D. E. Briggs, E. G. Clark, A. Duque, J. Hui, H. Mai, R. C. McKellar. 2021. Crab in amber reveals an early colonization of nonmarine environments during the Cretaceous. Science Advances. 7 (43):null.
Specimen: † Cretapsara athanata Luque, 2021
View: Dorsal view

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 (~100–99 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 non-marine 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.


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Article DOI: 10.1126/sciadv.abj5689

Project DOI: 10.7934/P4044, http://dx.doi.org/10.7934/P4044
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 42 Taxa
  • 1 Specimen
  • 93 Characters
Total size of project's media files: 95.33k

Download Project SDD File
Total scored cells: 2634
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 93
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 186
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:93/0
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MorphoBank Project 4044

    This research
    supported by

    Authors' Institutions

    • Royal Saskatchewan Museum, Regina

    • Duke University

    • Harvard University

    • University of Alberta

    • Yale University

    • Yunnan University

    • Smithsonian Tropical Research Institute

    • China University of Geosciences

    • Lynn University

    • University of Regina

    • Longyin Amber Museum



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Javier Luque
    Project Administrator
    421193002634
    (2521, 0, 113)
    000


    Taxonomic Overview for Matrix 'M27558' (30 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Homolodromiidae
    Last Modified in 06/25/21
    0929201001
    [2] Dromiidae
    Last Modified in 06/25/21
    0979102001
    [3] Dynomenidae
    Last Modified in 06/25/21
    0959102001
    [4] Sphaerodromiidae
    Last Modified in 06/25/21
    1959002001
    [5] Homolidae
    Last Modified in 06/25/21
    0959201001
    [6] Latreilliidae
    Last Modified in 06/25/21
    1909002001
    [7] Poupiniidae
    Last Modified in 06/25/21
    1919101001
    [8] Lyreididae
    Last Modified in 06/25/21
    2919001001
    [9] Raninidae
    Last Modified in 06/25/21
    2908803001
    [10] Cyclodorippidae
    Last Modified in 06/25/21
    0949102001
    [11] Cymonomidae
    Last Modified in 06/25/21
    0929003001
    [12] † Componocancer
    Last Modified in 06/25/21
    33555505001
    [13] Dorippe
    Last Modified in 06/25/21
    1898804001
    [14] † Telamonocarcinus
    Last Modified in 06/25/21
    24676702001
    [15] † Archaeochiapasa
    Last Modified in 06/25/21
    34575702001
    [16] † Marocarcinus
    Last Modified in 06/25/21
    19696905001
    [17] † Eogeryon
    Last Modified in 06/25/21
    39525202001
    [18] Chaceon
    Last Modified in 06/25/21
    0888805001
    [19] Carcinus
    Last Modified in 06/25/21
    0888805001
    [20] Callinectes
    Last Modified in 06/25/21
    0888805001
    [21] Potamocarcinus
    Last Modified in 06/25/21
    3868406001
    [22] Potamonautes
    Last Modified in 06/25/21
    3868406001
    [23] Himalayapotamon
    Last Modified in 06/25/21
    2878506001
    [24] Holthuisana
    Last Modified in 06/25/21
    5848206001
    [25] Dilocarcinus
    Last Modified in 06/25/21
    0908805001
    [26] Grapsus
    Last Modified in 06/25/21
    0898706001
    [27] Sesarma
    Last Modified in 06/25/21
    0888607001
    [28] Uca
    Last Modified in 06/25/21
    1858507001
    [29] Gecarcinus
    Last Modified in 06/25/21
    1858507001
    [30] Cretapsara
    Last Modified in 06/25/21
    25666602001


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views2858
    Project overview313
    Matrix views213Matrix landing page (168 views); Dataset Brachyura Phylogeny Luque et al. 2021 Science Advances (45 views);
    Media views690Media search (594 views); M813382 (96 views);
    Taxon list1082
    Bibliography112
    Views for media list169
    Specimen list279




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project52
    Project downloads51
    Matrix downloads1Dataset Brachyura Phylogeny Luque et al. 2021 Science Advances (1 download);