Project 2387: Fabiany Herrera, Gongle Shi, Patrick Knopf, Andrew B. Leslie, Niiden Ichinnorov, Masamichi Takahashi, Peter R. Crane, Patrick S. Herendeen. 2017. CUPRESSACEAE CONIFERS FROM THE EARLY CRETACEOUS OF MONGOLIA. International Journal of Plant Sciences. 178 (1):19-41.
Specimen: † Stutzeliastrobus foliatus (unvouchered)
View: 2D

Abstract

Premise of research. The two living species of Cunninghamia form a clade that is sister to the rest of the Cupressaceae sensu lato, within which the monotypic extant genus Taiwania is sister to all Cupressaceae except Cunninghamia. Seed cones of both Cunninghamia and Taiwania bear helically arranged bract-scale complexes, but a free ovuliferous scale is present only in Cunninghamia. Here, we describe two new genera of fossil seed cones similar to those of Cunninghamia and Taiwania.

Methodology. Early Cretaceous (Aptian-Albian) bulk lignite samples collected from the Tevshiin Govi locality were disaggregated in water, cleaned with hydrochloric and hydrofluoric acids, washed, and dried in air.

Pivotal results. Pentakonos gen. nov. has seed cones that are up to 7 mm long with ca. 25–30 helically arranged, papery bract-scale complexes that have minute teeth. Adaxially, the free tip of the membranous ovuliferous scale is denticulate, and the scale bears five small, thin-winged seeds. Pentakonos adds to the diverse Cunninghamia-like seed cones known from the early fossil record of Cupressaceae. Seed cones of Stutzeliastrobus gen. nov. are terminal and single on leafy shoots with helically arranged falcate scale leaves. Seed
cones are up to 32 mm long with ca. 30–70 helically arranged woody bract-scale complexes that lack a conspicuous, free ovuliferous scale. Morphological features of Stutzeliastrobus suggest a relationship with Taiwania, but the bract-scale complexes bear up to four inverted winged seeds rather than the two commonly seen in living Taiwania.

Conclusions. Together with previously described fossils, Pentakonos and Stutzeliastrobus provide additional evidence that both Cunninghamia-like and Taiwania-like plants were important elements in the early diversification of the Cupressaceae s.l. A morphological cladistic analysis of the phylogenetic position of Pentakonos and Stutzeliastrobus suggests that an expanded cunninghamioid clade followed by Stutzeliastrobus are the successive sister groups to all other extant Cupressaceae.



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Article DOI: DOI: 10.1086/689577

Project DOI: 10.7934/P2387, http://dx.doi.org/10.7934/P2387
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 28 Taxa
  • 1 Specimen
  • 22 Characters
Total size of project's media files: 1 MB

Download Project SDD File
Total scored cells: 534
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 22
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 58
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:22/0
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MorphoBank Project 2387

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    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
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    medialabels
    rules
    Fabiany Herrera
    Project Administrator
    Last logged in 01/12/17
    28112200534
    (533, 0, 1)
    000


    Taxonomic Overview for Matrix 'M24402' (28 Taxa)

    taxon unscored
    cells
    scored
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    cells
    "-" cellscell images labels on
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    [1] Cedrus deodara
    Last Modified in 01/11/17
    0222200001
    [2] Sciadopitys verticillata
    Last Modified in 01/11/17
    0222101001
    [3] Cunninghamia lanceolata
    Last Modified in 01/11/17
    0222200001
    [4] Taiwania cryptomerioides
    Last Modified in 01/11/17
    0222200001
    [5] Athrotaxis laxifolia
    Last Modified in 01/11/17
    0222200001
    [6] Sequoiadendron giganteum
    Last Modified in 01/11/17
    0222200001
    [7] Sequoia sempervirens
    Last Modified in 01/11/17
    0222200001
    [8] Metasequoia glyptostroboides
    Last Modified in 01/11/17
    0222200001
    [9] Cryptomeria japonica
    Last Modified in 01/11/17
    0222200001
    [10] Glyptostrobus pensilis
    Last Modified in 01/11/17
    0222200001
    [11] Taxodium distichum
    Last Modified in 01/11/17
    0222200001
    [12] Thuja occidentalis
    Last Modified in 01/11/17
    0222200001
    [13] Platycladus orientalis
    Last Modified in 01/11/17
    0222200001
    [14] Austrocedrus chilensis
    Last Modified in 01/11/17
    0222200001
    [15] † Elatides zhoui
    Last Modified in 01/12/17
    0222200001
    [16] † Elatides williamsonii
    Last Modified in 01/12/17
    0222200001
    [17] † Elatides harrisii
    Last Modified in 01/12/17
    2202000001
    [18] † Sewardiodendron laxum
    Last Modified in 01/12/17
    0222200001
    [19] † Cunninghamia taylorii
    Last Modified in 01/12/17
    3191900001
    [20] † Austrohamia minuta
    Last Modified in 01/12/17
    7151500001
    [21] † Cunninghamiostrobus goedertii
    Last Modified in 01/12/17
    6161600001
    [22] † Hubbardiastrobus cunninghamioides
    Last Modified in 01/12/17
    9131300001
    [23] † Hughmillerites juddii
    Last Modified in 01/12/17
    1310900001
    [24] † Scitistrobus duncaanensis
    Last Modified in 01/12/17
    12101000001
    [25] † Acanthostrobus edenensis
    Last Modified in 01/12/17
    10141200001
    [26] † Parataiwania nihongii
    Last Modified in 01/12/17
    12111000001
    [27] † Pentakonos diminutus
    Last Modified in 01/12/17
    12101000001
    [28] † Stutzeliastrobus foliatus
    Last Modified in 01/12/17
    4211800001


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    Specimen list639
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    Bibliography290
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