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Ovulate Cones of Schizolepidopsis ediae sp. nov. Provide Insights into the Evolution of Pinaceae
Matsunaga, Kelly K. S.1,6; Herendeen, Patrick S.1; Herrera, Fabiany1; Ichinnorov, Niiden2; Crane, Peter R.3,4; Shi, Gongle(史恭乐)5
2021-07-01
Source PublicationINTERNATIONAL JOURNAL OF PLANT SCIENCES
ISSN1058-5893
Pages18
Abstract

Premise of research. The extinct conifer genus Schizolepidopsis is characterized by deeply bilobed ovuliferous scales bearing two adaxial seeds. Although it is frequently placed in Pinaceae, the evidence for a close relationship with the family is mixed. Resolving the affinities of Schizolepidopsis has important implications for the age of Pinaceae because putative reports of the genus extend into the Late Permian. We describe a new species, Schizolepidopsis ediae sp. nov., based on specimens from the Lower Cretaceous of Mongolia and Inner Mongolia, China, that represent the first anatomically preserved occurrences of Schizolepidopsis. Methodology. Specimens were studied using light microscopy, cellulose acetate peels, and X-ray micro-computed tomography. To test relationships between Schizolepidopsis and Pinaceae, we performed conifer-wide phylogenetic analyses that included 10 previously described fossil conifers using DNA sequence data and a new morphological matrix of ovulate reproductive characters. Analyses were performed using Bayesian total evidence and parsimony backbone approaches. Pivotal results. Schizolepidopsis ediae possesses key characters of Pinaceae, including those related to pollination biology. Most analyses placed S. ediae in crown group Pinaceae (abietoid clade), with all other Schizolepidopsis species forming a grade along the Pinaceae stem. Uncertainty in the data indicates that stem group affinities of S. ediae are also possible. Conclusions. Schizolepidopsis ediae provides the first conclusive evidence linking Schizolepidopsis with extant Pinaceae. The phylogenetic relationships between extant Pinaceae and Schizolepidopsis suggest that seed wings evolved along the Pinaceae stem and not with the crown group and that, in combination with developmental genetic evidence, the simple ovuliferous scales of Pinaceae likely evolved from bilobed ovuliferous scales like those of Schizolepidopsis. More broadly, this study provides evidence of a Mesozoic Pinaceae stem group that might extend into the Paleozoic, helping to reconcile the ancient stem divergence of Pinaceae with its relatively recent crown age.

Keywordpaleobotany fossil conifer Pinaceae phylogenetics evolution ovuliferous scale
DOI10.1086/714281
Indexed BySCI
Language英语
WOS KeywordSEED-SCALE-COMPLEX ; MADS-BOX GENES ; INNER-MONGOLIA ; POLLINATION MECHANISM ; PHYLOGENETIC ANALYSIS ; REPRODUCTIVE-BIOLOGY ; OLDEST RECORD ; MORPHOLOGY ; CONIFER ; CUPRESSACEAE
Funding ProjectNational Science Foundation[DEB-1748286] ; Oak Spring Garden Foundation ; National Natural Science Foundation of China[41772014] ; Youth Innovation Promotion Association, CAS[2017359] ; Department of Earth and Environmental Sciences and College of Literature, Science and the Arts
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000648688200001
Funding OrganizationNational Science Foundation ; Oak Spring Garden Foundation ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Department of Earth and Environmental Sciences and College of Literature, Science and the Arts
PublisherUNIV CHICAGO PRESS
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/38061
Collection中国科学院南京地质古生物研究所
Corresponding AuthorMatsunaga, Kelly K. S.
Affiliation1.Chicago Bot Garden, 1000 Lake Cook Rd, Glencoe, IL 60022 USA
2.Mongolian Acad Sci, Inst Paleontol & Geol, POB 46-650, Ulaanbaatar 15160, Mongolia
3.Oak Spring, Oak Spring Garden Fdn, Upperville, VA 20184 USA
4.Yale Univ, Sch Environm, New Haven, CT 06511 USA
5.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China
6.Univ Kansas, Dept Ecol & Evolutionary Biol, Biodivers Inst, 1200 Sunnyside Ave, Lawrence, KS 66044 USA
Recommended Citation
GB/T 7714
Matsunaga, Kelly K. S.,Herendeen, Patrick S.,Herrera, Fabiany,et al. Ovulate Cones of Schizolepidopsis ediae sp. nov. Provide Insights into the Evolution of Pinaceae[J]. INTERNATIONAL JOURNAL OF PLANT SCIENCES,2021:18.
APA Matsunaga, Kelly K. S.,Herendeen, Patrick S.,Herrera, Fabiany,Ichinnorov, Niiden,Crane, Peter R.,&Shi, Gongle.(2021).Ovulate Cones of Schizolepidopsis ediae sp. nov. Provide Insights into the Evolution of Pinaceae.INTERNATIONAL JOURNAL OF PLANT SCIENCES,18.
MLA Matsunaga, Kelly K. S.,et al."Ovulate Cones of Schizolepidopsis ediae sp. nov. Provide Insights into the Evolution of Pinaceae".INTERNATIONAL JOURNAL OF PLANT SCIENCES (2021):18.
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