Project 2106: R. K. Engelman, F. Anaya, D. A. Croft. 2017. New palaeothentid marsupials (Paucituberculata) from the middle Miocene of Quebrada Honda, Bolivia, and their implications for the palaeoecology, decline and extinction of the Palaeothentoidea. Journal of Systematic Palaeontology. 15 (10):787-820.
Specimen: † Acdestis maddeni (unvouchered)
View: lateral

Abstract

Paucituberculatan marsupials, particularly members of the family Palaeothentidae, were important components of South American mammal communities during much of the Cenozoic. However, after the late early Miocene, palaeothentid remains are rare in the fossil record, and the group is last recorded at late middle Miocene sites in Colombia, Bolivia, and possibly Argentina. Here, we describe new specimens of palaeothentids from one of these late middle Miocene sites, Quebrada Honda, Bolivia, which include: (1) the first described lower dentitions of Acdestis maddeni, which exhibit distinctive features such as a greatly elongated paracristid and a single-rooted m4; (2) the first described late middle Miocene palaeothentines, representing two new species of Palaeothentes, P. serratus sp. nov. and P. relictus sp. nov., distinguished from other species of Palaeothentes by the presence of an anterobasal cingulid and reduced anterior trigonid crest, among other features; and (3) remains of a third new species, Chimeralestes ambiguus gen. et sp. nov., distinguished from other palaeothentids by its combination of a labially positioned cristid obliqua, reduced m4, and sharply curved entocristid. Phylogenetic and palaeoecological analyses show that Quebrada Honda palaeothentids were taxonomically and morphologically diverse and likely spanned a wide range of ecological niches. Combined with the wide geographic distribution of palaeothentoids during the late middle Miocene, this suggests that the disappearance of these marsupials was preceded by an abrupt rather than gradual decline in taxonomic and ecological diversity as well as geographic range.


Read the article »

Article DOI: 10.1080/14772019.2016.1240112

Project DOI: 10.7934/P2106, http://dx.doi.org/10.7934/P2106
This project containsMatrices
  • 44 Media
  • 1 Matrix
  • 2 Documents
  • 68 Taxa
  • 13 Specimens
  • 90 Characters
Total size of project's media files: 395 MB

Download Project SDD File
Total scored cells: 3785
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 90
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 215
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:70/20
Currently Viewing:
MorphoBank Project 2106

    This research
    supported by



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Russell Engelman
    Project Administrator
    Last logged in 11/09/16
    68134490003785
    (3673, 0, 112)
    000
    Darin Croft
    Full membership
    Last logged in 02/16/16
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M24153' (62 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] † Alphadon clemensi
    Last Modified in 08/08/16
    26616103002
    [2] † Pucadelphys andinus
    Last Modified in 08/08/16
    7808003002
    [3] Didelphis albiventris
    Last Modified in 08/08/16
    13747403002
    [4] † Derorhynchus singularis
    Last Modified in 08/08/16
    38515101002
    [5] † Fieratherium sorex
    Last Modified in 08/08/16
    37464508002
    [6] † Riolestes capricornicus
    Last Modified in 08/08/16
    65232302002
    [7] † Bardalestes sp.
    Last Modified in 08/08/16
    63262601002
    [8] † Bardalestes hunco
    Last Modified in 08/08/16
    72171701002
    [9] † Evolestes hadrommatos
    Last Modified in 08/08/16
    38525200002
    [10] † Evolestes sp.
    Last Modified in 08/08/16
    33575700002
    [11] Lestoros inca
    Last Modified in 08/08/16
    4858402002
    [12] Caenolestes fuliginosus
    Last Modified in 08/08/16
    3868502002
    [13] Rhyncholestes raphanurus
    Last Modified in 08/08/16
    2868602002
    [14] † Stilotherium dissimile
    Last Modified in 08/08/16
    5848302002
    [15] † Sp. nov. 2
    Last Modified in 11/09/16
    21676702002
    [16] † Pliolestes venetus
    Last Modified in 08/08/16
    52363602002
    [17] † Pliolestes tripotamicus
    Last Modified in 08/08/16
    38505002002
    [18] † Sp. nov. 1
    Last Modified in 11/09/16
    40484802002
    [19] † Sp. nov. 3
    Last Modified in 11/09/16
    58323200002
    [20] † Phonocdromus gracilis
    Last Modified in 08/08/16
    35515104002
    [21] † Sp. nov. 4
    Last Modified in 11/09/16
    12747404002
    [22] † Pichipilus riggsi
    Last Modified in 08/08/16
    14747402002
    [23] † Pichipilus centinelus
    Last Modified in 08/08/16
    16727202002
    [24] † Pichipilus osborni
    Last Modified in 08/08/16
    60303000002
    [25] † Pichipilus halleuxi
    Last Modified in 08/08/16
    60282802002
    [26] † Quirogalestes almagaucha
    Last Modified in 08/08/16
    63272700002
    [27] † Sp. nov. 5
    Last Modified in 11/09/16
    19696902002
    [28] † Sasawatsu mahaynaq
    Last Modified in 08/08/16
    55353500002
    [29] † Perulestes cardichi
    Last Modified in 08/08/16
    40505000002
    [30] † Perulestes fraileyi
    Last Modified in 08/08/16
    56323202002
    [31] † Pilchenia boliviensis
    Last Modified in 08/08/16
    23656502002
    [32] † Pilchenia lucina
    Last Modified in 08/08/16
    10808000002
    [33] † Pilchenia antiqua
    Last Modified in 08/08/16
    16747400002
    [34] † Pilchenia intermedia
    Last Modified in 08/08/16
    31595900002
    [35] † Carlothentes chubutensis
    Last Modified in 08/08/16
    41494900002
    [36] † Palaeothentes pascuali
    Last Modified in 08/08/16
    39484803002
    [37] † Palaeothentes minutus
    Last Modified in 08/08/16
    2878602002
    [38] † Palaeothentes intermedius
    Last Modified in 08/08/16
    6828202002
    [39] † Palaeothentes lemoinei
    Last Modified in 08/08/16
    2868602002
    [40] † Palaeothentes aratae
    Last Modified in 08/08/16
    8818101002
    [41] † Palaeothentes primus
    Last Modified in 08/08/16
    13777601002
    [42] † Palaeothentes marshalli
    Last Modified in 08/08/16
    10777703002
    [43] † Palaeothentes migueli
    Last Modified in 08/08/16
    10777703002
    [44] † Acdestis owenii
    Last Modified in 08/08/16
    0878604002
    [45] † Acdestis maddeni
    Last Modified in 08/08/16
    9787704002
    [46] † Trelewthentes rothi
    Last Modified in 08/08/16
    13757502002
    [47] † Titanothentes sp. nov.
    Last Modified in 11/09/16
    15737302002
    [48] † Titanothentes simpsoni
    Last Modified in 08/08/16
    38515101002
    [49] † Acdestodon bonapartei
    Last Modified in 08/08/16
    48403903002
    [50] † Parabderites bicrispatus
    Last Modified in 08/08/16
    11787801002
    [51] † Parabderites minisculus
    Last Modified in 08/08/16
    46444400002
    [52] † Abderites crispus
    Last Modified in 08/08/16
    19686803002
    [53] † Abderites meridionalis
    Last Modified in 08/08/16
    16727202002
    [54] † Abderites aisenense
    Last Modified in 08/08/16
    28606002002
    [55] † Pitheculites minimus
    Last Modified in 08/08/16
    16737202002
    [56] † Pitheculites chenche
    Last Modified in 08/08/16
    53373700002
    [57] † Pitheculites rothi
    Last Modified in 08/08/16
    64262600002
    [58] † Antawallalestes illimani
    Last Modified in 08/08/16
    8828200002
    [59] † Antawallalestes quimsacruza
    Last Modified in 08/08/16
    39515100002
    [60] † Palaeothentes relictus
    Last Modified in 08/08/16
    53343403002
    [61] † Chimeralestes ambiguus
    Last Modified in 08/08/16
    66212103002
    [62] † Palaeothentes serratus
    Last Modified in 08/08/16
    7787805002


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views20565
    Project overview1761
    Views for media list690
    Media views9190Media search (1589 views); M433650 (175 views); M374377 (162 views); M406597 (154 views); M406600 (170 views); M406548 (198 views); M406593 (170 views); M406599 (204 views); M406942 (184 views); M374351 (200 views); M407071 (176 views); M374348 (181 views); M406664 (152 views); M374350 (149 views); M406936 (164 views); M406560 (169 views); M406598 (161 views); M406556 (196 views); M406596 (176 views); M406595 (147 views); M406938 (177 views); M406549 (169 views); M406553 (166 views); M406601 (168 views); M432014 (176 views); M406552 (141 views); M406940 (174 views); M406941 (180 views); M406561 (199 views); M406662 (155 views); M406937 (143 views); M406557 (155 views); M406594 (157 views); M406663 (208 views); M406559 (188 views); M406550 (177 views); M406558 (184 views); M407073 (160 views); M406562 (183 views); M407072 (165 views); M374363 (195 views); M406943 (174 views); M406551 (173 views); M406935 (192 views); M406830 (154 views);
    Matrix views954Matrix landing page (871 views); Paucituberculatan Phylogenetic Matrix (83 views);
    Documents list686
    Taxon list4373
    Specimen list2535
    Bibliography376




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project81
    Project downloads75
    Matrix downloads4Paucituberculatan Phylogenetic Matrix (4 downloads);
    Media downloads2M374348 (1 download); M406830 (1 download);