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- W2024136071 abstract "Early land plant fossils can be challenging to interpret due to their morphological simplicity and often fragmentary nature. Morphometric techniques using commonly preserved characters might increase diagnostic value of such material. To evaluate the utility of morphometrics in assessing morphospecies boundaries in the Devonian, we compared degrees of variation within the cosmopolitan lycopsid genus Leclercqia with that of living relatives (Lycopodium-Spinulum spp.) Of particular interest was determining whether a new morphotype of Leclercqia from the Middle Devonian Chilliwack flora of Washington State fell within or outside the range of variation of previously described species.Morphological variation of Leclercqia was assessed across the geographic range of the genus using six vegetative and three reproductive characters. The new morphotype and two previously described species (L. complexa, L. andrewsii) were compared using linear discriminant analysis (LDA). Extant Lycopodium-Spinulum species and variants were similarly analyzed to assess inter- vs. intraspecific variation in living lycopsids.The LDA comparisons of Lycopodium-Spinulum yielded notable morphological disparity between species but substantial overlap between intraspecific variants. Among the fossils, LDA separates the new morphotype, Leclercqia complexa, and L. andrewsii to a similar degree as Lycopodium and Spinulum species. Based on these results and further study, we describe a new species of Leclercqia: Leclercqia scolopendra Benca et Strömberg sp. nov.Morphometric analyses can aid in informing taxonomic assignment of fragmentary early land plant fossils using readily preserved features, even in the absence of reproductive structures. Applications of this approach to the Chilliwack flora suggest Leclercqia displayed greater morphological variation, taxonomic diversity, and biogeographic extent than previously thought." @default.
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- W2024136071 date "2014-03-01" @default.
- W2024136071 modified "2023-09-26" @default.
- W2024136071 title "Applying morphometrics to early land plant systematics: A new<i>Leclercqia</i>(Lycopsida) species from Washington State, USA" @default.
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- W2024136071 doi "https://doi.org/10.3732/ajb.1300271" @default.
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