Project 3561: J. Luque, S. Gerken. 2019. Exceptional preservation of comma shrimp from a mid-Cretaceous Lagerstätte of Colombia, and the origins of crown Cumacea. Proceedings of the Royal Society B: Biological Sciences. 286 (1916):20191863.
Specimen: † Eobodotria muisca (:IGM p880695)
View: Eobodotria muisca, right side view

Abstract

Mesozoic rocks with exceptional preservation of marine arthropods are known worldwide but largely restricted to mid–high latitudes. The scarcity of assemblages with exceptional preservation in low, tropical latitudes greatly limits our understanding of the origins of several modern groups and the evolution of tropical biotas through time. Here, we report the oldest crown Cumacea, or ‘comma’ shrimp (Arthropoda: Eumalacostraca: Peracarida) with modern familial affinities, from a new mid-Cretaceous (95–90 Ma) Lagerstätte in tropical South America. Cumaceans have one of the poorest fossil records among marine arthropods, despite today being abundant and speciose benthic organisms associated with fine-grained sediments with high fossilization potential. Eobodotria muisca gen. et sp. nov., found in mass accumulation surfaces, preserves with detail the gut, mouth parts, thoracic legs/pereopods, pleopods, uropods bearing setae, antennal flagella and even small eyes bearing ommatidia. These features, rarely preserved in fossil crustaceans, plus the large sample size (greater than 200 individuals, 6–8 mm long), allow us to discuss phylogenetic/systematic aspects and explore possible mechanisms behind their unusual accumulation. Eobodotria bridges an approximately 165 Myr gap in the cumacean fossil record, provides a reliable calibration point for phylogenetic studies and expands our understanding of exceptional preservation in past and present tropical settings.


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Article DOI: 10.1098/rspb.2019.1863

Project DOI: 10.7934/P3561, http://dx.doi.org/10.7934/P3561
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 37 Taxa
  • 1 Specimen
  • 110 Characters
Total size of project's media files: 1.8M

Download Project SDD File
Total scored cells: 4804
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 110
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 302
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:110/0
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MorphoBank Project 3561

    Authors' Institutions

    • University of Alaska

    • University of Alberta

    • Yale University



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Javier Luque
    Project Administrator
    Last logged in 12/15/19
    3711110004804
    (4677, 0, 127)
    000


    Taxonomic Overview for Matrix 'M26305' (36 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Cimmerius
    Last Modified in 10/22/19
    210198010001
    [2] Diastylis
    Last Modified in 10/22/19
    41019808001
    [3] Hemilamprops
    Last Modified in 10/22/19
    17939300001
    [4] Eobodotria
    Last Modified in 10/22/19
    56545400001
    [5] Alticuma
    Last Modified in 10/22/19
    313210403001
    [6] Bacescuma
    Last Modified in 10/22/19
    210710305001
    [7] Bodotria
    Last Modified in 10/22/19
    018211000001
    [8] Coricuma
    Last Modified in 10/22/19
    710110003001
    [9] Cyclaspis
    Last Modified in 10/22/19
    020010802001
    [10] Cyclaspoides
    Last Modified in 10/22/19
    213410008001
    [11] Eocuma
    Last Modified in 10/22/19
    018310802001
    [12] Iphinoe
    Last Modified in 10/22/19
    118810900001
    [13] Austrocuma
    Last Modified in 10/22/19
    014110703001
    [14] Mossambicuma
    Last Modified in 10/22/19
    312110205001
    [15] Upselaspis
    Last Modified in 10/22/19
    411210204001
    [16] Zygosiphon
    Last Modified in 10/22/19
    111210504001
    [17] Apocuma
    Last Modified in 10/22/19
    112410405001
    [18] Cumopsis
    Last Modified in 10/22/19
    214810503001
    [19] Heterocuma
    Last Modified in 10/22/19
    213710008001
    [20] Hypocuma
    Last Modified in 10/22/19
    311910403001
    [21] Leptocuma
    Last Modified in 10/22/19
    216010602001
    [22] Mancocuma
    Last Modified in 10/22/19
    112810603001
    [23] Spilocuma
    Last Modified in 10/22/19
    511110104001
    [24] Pseudoleptocuma
    Last Modified in 10/22/19
    411310204001
    [25] Pseudosympodomma
    Last Modified in 10/22/19
    213810404001
    [26] Gephyrocuma
    Last Modified in 10/22/19
    411410402001
    [27] Zenocuma
    Last Modified in 10/22/19
    10919109001
    [28] Pomacuma
    Last Modified in 10/22/19
    311910502001
    [29] Gigacuma
    Last Modified in 10/22/19
    011910703001
    [30] Sympodomma
    Last Modified in 10/22/19
    215810800001
    [31] Speleocuma
    Last Modified in 10/22/19
    510610104001
    [32] Gaussicuma
    Last Modified in 10/22/19
    214510602001
    [33] Glyphocuma
    Last Modified in 10/22/19
    414010204001
    [34] Bathycuma
    Last Modified in 10/22/19
    215710701001
    [35] Vaunthompsonia
    Last Modified in 10/22/19
    016811000001
    [36] Picrocuma
    Last Modified in 10/22/19
    012010307001


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    Total project views1240
    Project overview198
    Matrix views121Exceptional preservation of comma shrimp from a mid-Cretaceous Lagerstätte of Colombia, and the origins of crown Cumacea (25 views); Matrix landing page (96 views);
    Media views240Media search (205 views); M682996 (35 views);
    Bibliography111
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    Specimen list109
    Taxon list400




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    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project19
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    Matrix downloads4Exceptional preservation of comma shrimp from a mid-Cretaceous Lagerstätte of Colombia, and the origins of crown Cumacea (4 downloads);