An evaluation of the species boundaries of two putative taxonomic entities of Euterpe (Arecaceae) based on reproductive and morphological features

Reproductive strategies of closely related species distributed along successional gradients should differ as a consequence of the trade-off between competition and colonization abilities. We compared male reproductive strategies of Quercus robur and Q. petraea, two partly interfertile European oak species with different successional status. In the studied even-aged stand, trees of the late-successional species (Q. petraea) grew faster and suffered less from intertree competition than trees of the early-successional species (Q. robur). A large-scale paternity study and a spatially explicit individual-based mating model were used to estimate parameters of pollen production and dispersal as well as sexual barriers between species. Male fecundity was found to be dependent both on a tree's circumference and on its environment, particularly so for Q. petraea. Pollen dispersal was greater and more isotropic in Q. robur than in Q. petraea. Premating barriers to hybridization were strong in both species, but more so in Q. petraea than in Q. robur. Hence, predictions based on the competition-colonization trade-off are well supported, whereas the sexual barriers themselves seem to be shaped by colonization dynamics.

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“…; Wendt et al . ). Using this expanded mating model, we identify the traits that affect the mating system of the two species.…”

Section: Introductionmentioning

confidence: 97%

Distinct male reproductive strategies in two closely related oak species

et al. 2014

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“…The hybridization process occurs naturally in some species, such as two species of palms, Euterpe espiritosantensis and Euterpe edulis, (Wendt et al 2011) have been observed hybridization events between the two species, which important morphological and reproductive characteristics, similar to observed Campomanesia. The authors also recognized the difficulties of identifying palm species based on only morphological characteristics, indicating the need for complementary studies to aid in the correct differentiation of the species.…”

Section: Campomanesia Pubescens Morphotypementioning

confidence: 88%

“…Similarly, plants of morphotypes 2 and 3 of C. pubescens are very similar with triangular sepals, bracteoles at the base of the buds that are larger than the bud, and foliform bracts at the base of the stems. They differ in the presence of a gland at the apex of the anther, which is found only in morphotype 3 (Amaral et al 2016), suggesting the possibility of cross-fertilization between these morphotypes and C. adamantium giving rise to intermediate characteristics through the formation of hybrids, as observed in sympatric palm species of the genus Euterpe (Wendt et al 2011). Barth & Barbosa (1972) concluded that the plant of family Myrtaceae represent a group, where the differences in pollinic morphology are limited to secondary characteristics, such as the dimensions of the grains varying between small and medium in size.…”

Section: Campomanesia Pubescens Morphotypementioning

confidence: 96%

“…Currently, the majority of species are defined based on morphological characteristics owing to a lack of information on phylogenetics and reproductive behavior. Thus, morphological discontinuities reveal the limits of a species (Wendt et al 2011) and complementary studies are needed to determine where phenotypic plasticity within a species ends and where a new species begins.…”

Section: Campomanesia Pubescens Morphotypementioning

confidence: 99%

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Campomanesia adamantium and Campomanesia pubesncens are distinct species? Use of palynology and molecular markers in taxonomy

et al. 2020

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The species Campomanesia adamantium and C. pubescens present a great morphological variability, with the existence of morphotypes and the indication of a possible hybridization process occurring between them. Thus, the aim of this study was to characterize the Campomanesia adamantium species and morphotypes of species Campomanesia pubescens through palynological reviews and with the use of molecular markers to assist the taxonomic description of the species. The plant material was collected in the experimental field of Federal University of Jataí, in bloom of 2014, and analyzes were performed in the Morphology Laboratory of Plant Taxonomy and in the Laboratory of Genetics and Plant Breeding belonging to the same institution. Analysis of scanning electron microscopy was performed at the Federal University of Lavras. Important information was found that reinforce the possibility of cross between Campomanesia adamantium and Campomanesia pubescens, generating morphotypes intermediaries, indicating a possible hybridisation process. It can be concluded that Campomanesia adamantium is farthest from the morphotype 2 from Campomanesia pubescens, and morphotypes 1 and 3 are intermediate between them, possibly being hybrids.

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“…(subsessilis clade in Figure 2A), since compilation of relevant information often leads to an improved comprehension of boundaries between species (e.g. Wendt et al 2011, Faria et al 2010. One or only a few individuals may not be representative of the species as a whole, especially for taxa with widespread distributions Walsh 2000).…”

Section: Morphometrics Of the Chamaecostus Subsessilis Complexmentioning

confidence: 99%

Evolution of species diversity in the genus Chamaecostus (Costaceae): molecular phylogenetics and morphometric approaches

et al. 2015

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While most species within the genus Chamaecostus (Costaceae) are well defined, the broad geographic range and long list of synonyms associated with Chamaecostus subsessilis led us to believe there may be some cryptic species within the complex. We thus investigate the phylogenetic relationships of species in the Chamaecostus lineage and specifically test the monophyly and diversity of the Chamaecostus subsessilis species complex from a population perspective by analyzing molecular sequence data and leaf morphometrics. We interpret evolutionary trends across the entire genus based on a molecular character-based phylogenetic hypothesis that includes all currently described species of Chamaecostus. Our results show that while Chamaecostus is strongly monophyletic, C. cuspidatus is found to be sister to a clade of some but not all samples of C. subsessilis, making it necessary to acknowledge more than one species in the C. subsessilis complex. Herbarium specimens of the C. subsessilis complex could be assigned based on geographic proximity to one of the major three clades recovered in the phylogenetic analysis. Leaf morphometric measurements were performed on each of these lineages and traits were tested to detect differences among phylogenetic lineages. We conclude by proposing the recognition of a new combination, Chamaecostus acaulis, which we describe.

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An evaluation of the species boundaries of two putative taxonomic entities of Euterpe (Arecaceae) based on reproductive and morphological features

Cited by 11 publications

References 41 publications

Distinct male reproductive strategies in two closely related oak species

Distinct male reproductive strategies in two closely related oak species

Campomanesia adamantium and Campomanesia pubesncens are distinct species? Use of palynology and molecular markers in taxonomy

Evolution of species diversity in the genus Chamaecostus (Costaceae): molecular phylogenetics and morphometric approaches

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