Disentangling Species Limits in the <i>Vauquelinia corymbosa</i> Complex (Pyreae, Rosaceae)

Vásquez‐Cruz, Marilyn; Vovides, Andrew P.; Sosa, Victoria

doi:10.1600/036364417x696519

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…The rosewoods of the genus Vauquelinia form a paleoendemic desert plant‐lineage with a Paleogene fossil record in areas with marked climate seasonality. In the current day, Vauquelinia is represented by four species (Vásquez‐Cruz et al ., 2017; https://powo.science.kew.org/; some sources say three with several varieties, e.g. Hess & Henrickson, 1987).…”

Section: Introductionmentioning

confidence: 99%

Cenozoic migration of a desert plant lineage across the North Atlantic

et al. 2023

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Previous paleobotanical work concluded that Paleogene elements of the sclerophyllous subhumid vegetation of western Eurasia and western North America were endemic to these disjunct regions, suggesting that the southern areas of the Holarctic flora were isolated at that time. Consequently, molecular studies invoked either parallel adaptation to dry climates from related ancestors, or long-distance dispersal in explaining disjunctions between the two regions, dismissing the contemporaneous migration of dry-adapted lineages via land bridges as unlikely.We report Vauquelinia (Rosaceae), currently endemic to western North America, in Cenozoic strata of western Eurasia. Revision of North American fossils previously assigned to Vauquelinia confirmed a single fossil-species of Vauquelinia and one of its close relative Kageneckia.We established taxonomic relationships of fossil-taxa using diagnostic character combinations shared with modern species and constructed a time-calibrated phylogeny.The fossil record suggests that Vauquelinia, currently endemic to arid and subdesert environments, originated under seasonally arid climates in the Eocene of western North America and subsequently crossed the Paleogene North Atlantic land bridge (NALB) to Europe. This pattern is replicated by other sclerophyllous, dry-adapted and warmth-loving plants, suggesting that several of these taxa potentially crossed the North Atlantic via the NALB during Eocene times.

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Section: Introductionmentioning

confidence: 99%

Cenozoic migration of a desert plant lineage across the North Atlantic

et al. 2023

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“…The assignment to Banksia or other Proteaceae as proposed by Brown (1934) is refuted due to major differences in leaf venation, and inflorescence type, and each capsular fruit obviously developed from a syncarpous gynoecium, not follicles from a single carpel per flower. MacGinitie′s (1969) attribution of the species to Vauquelinia is contradicted by the lack of stipule scars on the twig and by differences in leaf venation and floral morphology, especially the apparent lack of a hypanthium (Vásquez-Cruz et al, 2017). Additionally, the specimens attributed to this species by MacGinitie (1969, Pl.…”

Section: Discussionmentioning

confidence: 99%

First recognition of the extinct eudicot genus Palibinia in North America: Leaves and fruits of Palibinia comptonifolia (R.W.Br.) comb. nov. from the Eocene of Utah and Colorado, USA

Manchester,

Judd,

Kodrul

2023

J of Sytematics Evolution

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Newly investigated leafy twigs bearing axillary fruits from the Eocene Parachute Creek Member of the Green River Formation in eastern Utah, USA, have provided more information on the species previously attributed to the Proteaceae as Banksia comptonifolia R.W.Br. The leaves are simple, estipulate with short petioles, and elongate laminae with prominent angular nonglandular teeth. The laminae have a thick midvein and pinnate craspedodromous secondaries, and are distinctive in the presence of a thick, often coalified, marginal rim. Vegetative and reproductive buds occur in the axils of the leaves. These features indicate that the species belongs to Palibinia Korovin—an extinct Eudicot genus previously known only from the Paleogene of Asia and Europe. Small pedicellate ovoid fruits 1.5–2.2 mm wide are borne in fascicles of three and are seen to be capsules with four apical valves. Despite the specific epithet referring to similarity of the foliage to that of Comptonia (Myricaceae), the fasciculate inflorescence organization with axillary flowers is quite distinct from the catkins characteristic of that family. Assignment to Banksia or other Proteaceae with complex inflorescences and follicular fruits is also problematic. Additionally, MacGinitie′s transfer of the species to Vauquelinia of the Rosaceae is contradicted by the lack of stipule scars on the twig and by differences in leaf venation and floral morphology. We transfer the species to Palibinia comptonifolia (R.W.Br.) comb. nov., but its familial affinity within the Pentapetalae remains uncertain. This new occurrence augments records from the Paleogene of Turkmenistan, Kazakhstan, China, England, and Germany.

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“…Subsequent research studies have conceptualized this multisource approach to species delimitation and proposed procedural protocols for the joint and/or sequential application of different sources of evidence [ 7 , 8 ] (see [ 9 ] for a comparable approach from the “biosystematics” era) and even developed tools for the computationally combined analysis of different lineage properties. As examples of the latter, the joint analyses of morphology, genetics, and geography (Geneland) [ 10 ], morphology and geography (“multivariate normal mixtures and tolerance regions” analysis) [ 11 , 12 ], genealogy and morphology (iBPP) [ 13 ], or genetics and geography (regression analysis) [ 14 ] are of interest.…”

Section: Introductionmentioning

confidence: 99%

The Warps and Wefts of a Polyploidy Complex: Integrative Species Delimitation of the Diploid Leucanthemum (Compositae, Anthemideae) Representatives

Ott

Schall

Vogt

et al. 2022

Plants

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Species delimitation—owing to the paramount role of the species rank in evolutionary, ecological, and nature conservation studies—is an essential contribution of taxonomy to biodiversity research. In an ‘integrative taxonomy’ approach to species delimitation on the diploid level, we searched for evolutionary significant units (the warps and wefts) that gave rise to the polyploid complex of European ox-eye daisies (Leucanthemum; Compositae-Anthemideae). Species discovery and validation methods based on genetic, ecological, geographical, and morphometric datasets were applied to test the currently accepted diploid morpho-species, i.e., morphologically delimited species, in Leucanthemum. Novel approaches were taken in the analyses of RADseq data (consensus clustering), morphometrics of reconstructed leaf silhouettes from digitized herbarium specimens, and quantification of species-distribution overlaps. We show that 17 of the 20 Leucanthemum morpho-species are supported by genetic evidence. The taxonomic rank of the remaining three morpho-species was resolved by combining genealogic, ecologic, geographic, and morphologic data in the framework of von Wettstein’s morpho-geographical species concept. We herewith provide a methodological pipeline for the species delimitation in an ‘integrative taxonomy’ fashion using sources of evidence from genealogical, morphological, ecological, and geographical data in the philosophy of De Queiroz’s “Unified Species Concept”.

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Disentangling Species Limits in the Vauquelinia corymbosa Complex (Pyreae, Rosaceae)

Cited by 6 publications

References 20 publications

Cenozoic migration of a desert plant lineage across the North Atlantic

Cenozoic migration of a desert plant lineage across the North Atlantic

First recognition of the extinct eudicot genus Palibinia in North America: Leaves and fruits of Palibinia comptonifolia (R.W.Br.) comb. nov. from the Eocene of Utah and Colorado, USA

The Warps and Wefts of a Polyploidy Complex: Integrative Species Delimitation of the Diploid Leucanthemum (Compositae, Anthemideae) Representatives

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