Project 4044: J. Luque, L. Xing, D. Briggs, E. G. Clark, A. Duque, J. Hui, H. Mai, R. C. McKellar. 2021. Crabs in amber reveal an early colonization of non-marine environments during the Cretaceous. Science Advances. (In Press)
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.


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
  • Creation Date:
    25 June 2021
  • Publication Date:
    26 August 2021
  • Project views: 989

    This research
    supported by

    Authors' Institutions

    • Harvard University

    • University of Alberta

    • Yale University



    Members

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


    Taxonomic Overview for Matrix 'M27558' (30 Taxa)

    taxon unscored
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    "-" cellscell images labels on
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    [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 views989
    Project overview131
    Matrix views69Matrix landing page (61 views); Dataset Brachyura Phylogeny Luque et al. 2021 Science Advances (8 views);
    Media views204Media search (170 views); M813382 (34 views);
    Taxon list384
    Bibliography37
    Views for media list59
    Specimen list105




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    Total downloads from project23
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