PITYOSTROBUS ANDRAEI (PINACEAE) FROM THE BARREMIAN (LOWER CRETACEOUS) OF BELGIUM: A MORPHOMETRIC REVISION

De Brito, Léa; Prestianni, Cyrille

doi:10.1086/712355

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PITYOSTROBUS ANDRAEI (PINACEAE) FROM THE BARREMIAN (LOWER CRETACEOUS) OF BELGIUM: A MORPHOMETRIC REVISION

De Brito, Léa; Prestianni, Cyrille

2021 • In International Journal of Plant Sciences, 182 (3)

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https://hdl.handle.net/2268/263082

DOI
10.1086/712355

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Keywords :

Wealden; Conifers; Disparity; Cone; Morphometry; Diversity

Abstract :

[en] Important floristic changes took place during the Early Cretaceous (145.0–100.5 Ma). They are notably marked by a peak in conifer diversity, especially within Pinaceae. This diversification is attested to by the numerous ovulate cone taxa found in the western European and North American fossil records. Exceptional deposits in the Wealden facies (Barremian-Albian, 125.0–100.5 Ma) of western Belgium (La Louvière, Houdeng-Aimeries) have yielded hundreds of exceptionally well-preserved pinaceous ovulate cones, yet most of these remain unstudied. These are presently revised. We investigate the morphological variation of the most abundant species, Pityostrobus andraei (Coemans) Seward 1919, with a morphometric approach. This work applies statistical tests to a large sample (n p 132 fossil cones) for the first time, using 10 measurements to characterize the morphology of the cones. Our analyses recover eight distinct morphotypes included in the original specific concept of P. andraei, and most of the specimens belong to two main morphotypes that represent 50% and 25% of the total specimens analyzed. Our results suggest that the specific diversity of early Pinaceae is underestimated, as it is based on older species concepts. Modern quantitative approaches have the potential to better characterize the breadth and tempo of pinaceous diversification.

Disciplines :

Earth sciences & physical geography

Author, co-author :

De Brito, Léa ; Université de Liège - ULiège > Département de géologie > Evolution and diversity dynamics lab

Prestianni, Cyrille ; Université de Liège - ULiège > Département de géologie > Evolution and diversity dynamics lab

Language :

English

Title :

PITYOSTROBUS ANDRAEI (PINACEAE) FROM THE BARREMIAN (LOWER CRETACEOUS) OF BELGIUM: A MORPHOMETRIC REVISION

Publication date :

2021

Journal title :

International Journal of Plant Sciences

ISSN :

1058-5893

eISSN :

1537-5315

Publisher :

University of Chicago Press, United States - Illinois

Volume :

182

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://www.journals.uchicago.edu/doi/full/10.1086/712355?casa_token=p4VTlqu7zrcAAAAA%3ATKMUtjz47eKIJlN1IqS-RETww5sSn6Kp-HpT6VrSxb_nGO-h18_g_NQg08ugOUQISjScBydFrsRlRw

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]

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since 07 September 2021

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