Project 3725: F. Herrera, G. Shi, M. A. Bickner, N. Ichinnorov, A. B. Leslie, P. R. Crane, P. S. Herendeen. 2021. Early Cretaceous abietoid Pinaceae from Mongolia and the history of seed scale shedding. American Journal of Botany. 108 (8):1483-1499.
Specimen: † Lepidocasus mellonae (Field Museum/PP:PP60450)
View: Adaxial, Abaxial

Abstract

Premise
Seed cones of extant Pinaceae exhibit two mechanisms of seed release. In “flexers” the cone scales remain attached to the central axis, while flexing and separating from each other to release the seeds. In “shedders” scales are shed from the axis, with the seeds either remaining attached to the scale or becoming detached. The early fossil history of Pinaceae from the Jurassic to Early Cretaceous is dominated by flexing seed cones, while the systematic information provided by shedding fossil cones has been overlooked and rarely integrated with data based on compression and permineralized specimens. We describe the earliest and best-documented evidence of a “shedder” seed cone from the Aptian–Albian of Mongolia.

Methods
Lignite samples from Tevshiin Govi locality were disaggregated in water, washed, and dried in air. Fossils were compared to material of extant Pinaceae using LM and CT scans.

Results
Lepidocasus mellonae gen. et sp. nov. is characterized by a seed cone that disarticulated at maturity and shed obovate bract–scale complexes that have a distinctive ribbed surface and an abaxial surface covered with abundant trichomes. The ovuliferous scale has ca. 30–40 resin canals, but only scarce xylem near the attachment to the cone axis. Resin vesicles are present in the seed integument. Phylogenetic analysis places Lepidocasus as sister to extant Cedrus within the abietoid grade.

Conclusions
The exquisite preservation of the trichomes in L. mellonae raises questions about their potential ecological function in the cones of fossil and living Pinaceae. Lepidocasus mellonae also shows that a shedding dispersal syndrome, a feature that has often been overlooked, evolved early in the history of Pinaceae during the Early Cretaceous.



Read the article »

Article DOI: 10.1002/ajb2.1713

Project DOI: 10.7934/P3725, http://dx.doi.org/10.7934/P3725
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 90 Taxa
  • 1 Specimen
  • 189 Characters
Total size of project's media files: 57.52M

Download Project SDD File
Total scored cells: 8419
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 189
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 459
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:189/0
Currently Viewing:
MorphoBank Project 3725
  • Creation Date:
    05 May 2020
  • Publication Date:
    14 September 2021
  • Project views: 843

    This research
    supported by

    Authors' Institutions

    • Stanford University

    • Yale University

    • Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences

    • Chicago Botanic Garden

    • Mongolian Academy of Sciences

    • Oak Spring Garden Foundation



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Fabiany Herrera
    Project Administrator
    9011189008419
    (8030, 0, 389)
    000


    Taxonomic Overview for Matrix 'M26614' (90 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Ginkgo biloba
    Last Modified in 05/05/20
    50116116023001
    [2] Araucaria heterophylla
    Last Modified in 05/05/20
    63112110016001
    [3] Phyllocladus hypophyllus
    Last Modified in 05/05/20
    70108108011001
    [4] Cryptomeria japonica
    Last Modified in 05/05/20
    37143141011001
    [5] Sciadopitys verticillata
    Last Modified in 05/05/20
    38140140011001
    [6] Cephalotaxus harringtonii
    Last Modified in 05/05/20
    62109109018001
    [7] † Cordaixylon dumusum
    Last Modified in 06/03/20
    828383024001
    [8] † Mesoxylon priapi
    Last Modified in 06/03/20
    987070021001
    [9] † Emporia lockardii
    Last Modified in 06/03/20
    1016968020001
    [10] † Barthelia furcata
    Last Modified in 06/03/20
    1106261018001
    [11] † Hanskerpia hamiltonensis
    Last Modified in 06/03/20
    1106261018001
    [12] † Pararaucaria patagonica
    Last Modified in 06/03/20
    1304948011001
    [13] Pinus thunbergii
    Last Modified in 05/05/20
    4514314301001
    [14] Pinus halepensis
    Last Modified in 05/05/20
    7811011001001
    [15] Pinus pinaster
    Last Modified in 05/05/20
    6712012002001
    [16] Pinus teocote
    Last Modified in 05/05/20
    5113813701001
    [17] Pinus contorta
    Last Modified in 05/05/20
    4014814801001
    [18] Pinus ponderosa
    Last Modified in 05/05/20
    1017917801001
    [19] Pinus aristata
    Last Modified in 05/05/20
    6112712602001
    [20] Pinus monophylla
    Last Modified in 05/05/20
    4314614501001
    [21] Pinus pinceana
    Last Modified in 05/05/20
    5613213102001
    [22] Pinus nelsonii
    Last Modified in 05/05/20
    3615115102001
    [23] Pinus bungeana
    Last Modified in 05/05/20
    7211811700001
    [24] Pinus lambertiana
    Last Modified in 05/05/20
    4414414401001
    [25] Pinus krempfii
    Last Modified in 05/05/20
    6112612602001
    [26] Picea abies
    Last Modified in 05/05/20
    3115015008001
    [27] Picea chihuahuana
    Last Modified in 05/05/20
    5612812706001
    [28] Picea glauca
    Last Modified in 05/05/20
    6211911908001
    [29] Picea sitchensis
    Last Modified in 05/05/20
    5013113108001
    [30] Cathaya argyrophylla
    Last Modified in 05/05/20
    2815615605001
    [31] Pseudotsuga macrocarpa
    Last Modified in 05/05/20
    6511811806001
    [32] Pseudotsuga menziesii
    Last Modified in 05/05/20
    1716616606001
    [33] Larix occidentalis
    Last Modified in 05/05/20
    3015715504001
    [34] Larix decidua
    Last Modified in 05/05/20
    6012612405001
    [35] Abies concolor
    Last Modified in 05/05/20
    3514514509001
    [36] Abies lasiocarpa
    Last Modified in 05/05/20
    5612412409001
    [37] Abies mariesii
    Last Modified in 05/05/20
    7011011009001
    [38] Abies religiosa
    Last Modified in 05/05/20
    6511611608001
    [39] Cedrus deodara
    Last Modified in 05/05/20
    2615815706001
    [40] Keteleeria davidiana
    Last Modified in 05/05/20
    4713713606001
    [41] Pseudolarix amabilis
    Last Modified in 05/05/20
    2415915906001
    [42] Nothotsuga longibracteata
    Last Modified in 05/05/20
    6811611506001
    [43] Tsuga canadensis
    Last Modified in 05/05/20
    2815415308001
    [44] † Eathiestrobus mackenziei
    Last Modified in 06/03/20
    137515101001
    [45] † Obirastrobus kokubunii
    Last Modified in 06/03/20
    130595801001
    [46] † Obirastrobus nihongii
    Last Modified in 06/03/20
    129605901001
    [47] Picea burtonii
    Last Modified in 05/05/20
    132565601001
    [48] Pinus belgica
    Last Modified in 05/05/20
    131585800001
    [49] Pinus arnoldii
    Last Modified in 05/05/20
    7311311303001
    [50] Pinus yorkshirensis
    Last Modified in 05/05/20
    127616101001
    [51] Pityostrobus andraei
    Last Modified in 05/05/20
    133565600001
    [52] Pityostrobus argonnensis
    Last Modified in 05/05/20
    130575702001
    [53] Pityostrobus beardii
    Last Modified in 05/05/20
    134555500001
    [54] Pityostrobus bommeri
    Last Modified in 05/05/20
    129585802001
    [55] Pityostrobus californiensis
    Last Modified in 05/05/20
    133555501001
    [56] Pityostrobus cliffwoodensis
    Last Modified in 05/05/20
    134535302001
    [57] Pityostrobus corneti
    Last Modified in 05/05/20
    130585801001
    [58] Pityostrobus hallii
    Last Modified in 05/05/20
    132555502001
    [59] Pityostrobus hautrageanus
    Last Modified in 05/05/20
    133565600001
    [60] Pityostrobus hokodzensis
    Last Modified in 05/05/20
    133555501001
    [61] Pityostrobus hueberi
    Last Modified in 05/05/20
    128595902001
    [62] Pityostrobus jacksonii
    Last Modified in 05/05/20
    135535301001
    [63] Pityostrobus kayeii
    Last Modified in 05/05/20
    128606001001
    [64] Pityostrobus leckenbyi
    Last Modified in 05/05/20
    131575701001
    [65] Pityostrobus lynnii
    Last Modified in 05/05/20
    135545301001
    [66] Pityostrobus macrocephalus
    Last Modified in 05/05/20
    136525201001
    [67] Pityostrobus makahensis
    Last Modified in 05/05/20
    131595701001
    [68] Pityostrobus matsubarae
    Last Modified in 05/05/20
    131575701001
    [69] Pityostrobus mcmurrayensis
    Last Modified in 05/05/20
    134545401001
    [70] Pityostrobus milleri
    Last Modified in 05/05/20
    135535202001
    [71] Pityostrobus oblongus
    Last Modified in 05/05/20
    131575701001
    [72] Pityostrobus palmeri
    Last Modified in 05/05/20
    130605900001
    [73] Pityostrobus pluriresinosa
    Last Modified in 05/05/20
    152373700001
    [74] Pityostrobus pubescens
    Last Modified in 05/05/20
    133545402001
    [75] Pityostrobus ramentosa
    Last Modified in 05/05/20
    132555502001
    [76] Pityostrobus shastaensis
    Last Modified in 05/05/20
    136535300001
    [77] Pityostrobus villerotensis
    Last Modified in 05/05/20
    126626201001
    [78] Pityostrobus virginiana
    Last Modified in 05/05/20
    130575702001
    [79] Pityostrobus yixianensis
    Last Modified in 05/05/20
    128606001001
    [80] Pseudoaraucaria arnoldii
    Last Modified in 05/05/20
    126636201001
    [81] Pseudoaraucaria benstedi
    Last Modified in 05/05/20
    144444401001
    [82] Pseudoaraucaria gibbosa
    Last Modified in 05/05/20
    128616100001
    [83] Pseudoaraucaria heeri
    Last Modified in 05/05/20
    126626201001
    [84] Pseudoaraucaria loppineti
    Last Modified in 05/05/20
    128606001001
    [85] Pseudoaraucaria major
    Last Modified in 05/05/20
    128606001001
    [86] Pinus escalantensis
    Last Modified in 05/05/20
    134545401001
    [87] Pinus haborensis
    Last Modified in 05/05/20
    179101000001
    [88] Pinus matthewsii
    Last Modified in 05/05/20
    124656500001
    [89] Pinus mutoi
    Last Modified in 05/05/20
    138515100001
    [90] † Lepidocasus mellonae
    Last Modified in 06/03/20
    133565501001


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views843
    Project overview69
    Documents list43
    Matrix views60Matrix landing page (42 views); Morphological Pinaceae matrix (18 views);
    Taxon list360
    Media views151Media search (128 views); M822565 (23 views);
    Views for media list51
    Bibliography26
    Specimen list83




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project13
    Project downloads13