A novel approach for the metric analysis of fern fronds: Growth and architecture of the Mesozoic fern Weichselia reticulata in the light of modern ferns
| Autor: | Véronique Daviero-Gomez, Angela D. Buscalioni, Candela Blanco-Moreno, Jesús Marugán-Lobón, Bernard Gomez |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010506 paleontology
Sphaeropteris cooperi Frond Leaves Science Plant Science 010502 geochemistry & geophysics Research and Analysis Methods 01 natural sciences Petiole (botany) Woodwardia unigemmata Mathematical and Statistical Techniques Botany Mesozoic Las Hoyas Statistical Methods Flowering Plants 0105 earth and related environmental sciences Plant Fossils Principal Component Analysis Multidisciplinary biology Fossils Plant Anatomy Applied Mathematics Simulation and Modeling Fronds Statistics Organisms Biology and Life Sciences Eukaryota Paleontology Plants biology.organism_classification Plant Leaves Spain Multivariate Analysis Physical Sciences Angiopteris evecta Ferns Earth Sciences Medicine Fern Algorithms Mathematics Research Article |
| Zdroj: | PLoS ONE PLoS ONE, Vol 14, Iss 6, p e0219192 (2019) |
| ISSN: | 1932-6203 |
| Popis: | The architecture of primary and secondary pinnae of the fossil fern Weichselia reticulata (C. Stokes et Webb) Fontaine is studied based on 28 large specimens from the upper Barremian La Huérguina Formation of the fossil locality Las Hoyas, Cuenca, Spain. The study of the specimens is performed through a morphometric analysis consisting in a reformulation of the Branching Algorithms method of shape description including measurements (insertion angle, distance between pinnae, first segment length and rachis width) and ratios (interval ratio, branching ratio and tapering ratio). A protocol to relocate isolated fragments of fossil pinnae is also established using the interval ratio (distance between pinnae/ previous distance between pinnae) and insertion angle of the pinnae. All specimens show a similar architecture, having elliptic primary pinnae with a sinuous apically tapering primary rachis and triangular secondary pinnae with pinnules of different morphologies. The analysis of the architecture allows to propose that the position of the frond was plagiotropic and that the frond growth was basiplastic for the petiole head and acroplastic for the primary pinnae. The metric method is applied to explore the architecture of four living fern species (Angiopteris evecta (Forst.) Hoffm., Matonia pectinata R.Br., Sphaeropteris cooperi (F.Muell.) R.M.Tryon, and Woodwardia unigemmata (Makino) Nakai). Weichselia architecture results extremely ordered and regular in comparison with the primary pinnae variation of the living species. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |