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12 results for “Tetraglochin”
Data from: Ecological and spatial patterns associated with diversification of the shrub genus Tetraglochin along Southern-Central Andes (Rosaceae)
In addition to the degree of geographical isolation (sympatry, parapatry, allopatry and peripatry), ecology can be an important factor promoting diversification of lineages, both by niche divergence as well as niche conservatism. Tetraglochin is a genus of shrubs with six species distributed along the Southern and Central Andes, from Peru to southern Argentina and central Chile. Although monophyly of the genus as the identity of its species are well established, spatiotemporal framework for its diversification and the potential role of the ecology and geography in the speciation process remain unknown. In the present study we analyzed diversification times and historical biogeography of the genus, and conducted different climatic niche and geographical range comparisons among its species to determine possible patterns associated with speciation. Results support the Pleistocene diversification, early along the Southern Andes and the Patagonian Steppe and subsequently in the Central Andes. Climatic niche divergence did not prove to be a major factor promoting speciation, but rather the phylogenetic niche conservatism. Our analyses also favored the sympatric model of speciation, although patterns from geographical range evolution are difficult to interpret due to the lability on the ancestral distributions, and therefore micro-allopatric or parapatric divergence associated with the glacial-interglacial cycles and climatic oscillations throughout the Quaternary should not be discarded. Other potential factors associated with diversification of Tetraglochin are also discussed.
FIGURE 8. Tetraglochin cristata—a in Taxonomic revision of the genus Tetraglochin (Rosaceae, Rosoideae) and morphometric analysis of its species
FIGURE 8. Tetraglochin cristata—a general aspect of a branch; b detail of a petiole-rachis axis of a macroblast with leaflets; c flower; d winged hypanthium covering the fruit, showing the wings with opaque rays and dentate margins; e trasversal section of the hypanthium and fruit. a–e from Zuloaga et al. 13058.
FIGURE 2 in Taxonomic revision of the genus Tetraglochin (Rosaceae, Rosoideae) and morphometric analysis of its species
FIGURE 2. Phenogram representing the Euclidean distances obtained by UPGMA among species of Tetraglochin.
FIGURE 7. Tetraglochin caespitosa—a in Taxonomic revision of the genus Tetraglochin (Rosaceae, Rosoideae) and morphometric analysis of its species
FIGURE 7. Tetraglochin caespitosa—a general aspect of the plant; b detail of a leaf of a macroblast, showing the sheating base, the petiole and the compound leaf blade; c two flowers; d irregular winged hypanthium covering the fruit; e trasversal section of the hypanthium and fruit. a–e from Zuloaga et al. 14805.
FIGURE 4. Tetraglochin acanthocarpa—a in Taxonomic revision of the genus Tetraglochin (Rosaceae, Rosoideae) and morphometric analysis of its species
FIGURE 4. Tetraglochin acanthocarpa—a general aspect of the plant; b detail of several leaves of a macroblast and a flower; c and d details of a leaves of a macroblast, showing the sheating base, the petiole and the compound leaf blade; e flower; f thorny indurated hypanthium covering the fruit; g trasversal section of the hypanthium and fruit. a-g from Barboza et al. 2393.
FIGURE 1 in Taxonomic revision of the genus Tetraglochin (Rosaceae, Rosoideae) and morphometric analysis of its species
FIGURE 1. Details of some vegetative characters considered for morphometric analyses. a: sector of a macroblast in Tetraglochin alata; the leaves of the macroblast present sheating petiolar base and thorny petiole-rachis axis, as the leaflets are deciduous; b: leaf of a macroblast in T. caespitosa; c: sector of a macroblast in T. andina.
FIGURE 6. Tetraglochin andina—a in Taxonomic revision of the genus Tetraglochin (Rosaceae, Rosoideae) and morphometric analysis of its species
FIGURE 6. Tetraglochin andina—a general aspect of a branch; b detail of a macroblast showing several thorny petiole-rachis axis without leaflets, and groups of axilar brachiblasts with compound leaves and flowers; c detail of a leaf of a macroblast, showing the sheating base, the petiole and the compound leaf blade; d flower; e winged hypanthium covering the fruit; f trasversal section of the hypanthium and fruit. a–f from Zuloaga et al. 12046.
FIGURE 3 in Taxonomic revision of the genus Tetraglochin (Rosaceae, Rosoideae) and morphometric analysis of its species
FIGURE 3. Plot of the canonical discriminant analysis from the morphometric data. a: plot of the canonical axis 1 vs. canonical axis 2; b: plot of the canonical axis 1 vs. canonical axis 3.
FIGURE 5. Tetraglochin alata. var. alata—a in Taxonomic revision of the genus Tetraglochin (Rosaceae, Rosoideae) and morphometric analysis of its species
FIGURE 5. Tetraglochin alata. var. alata—a general aspect of a branch; b detail of a long thorny petiole-rachis axis of a macroblast without leaflets; c general aspect of a macroblast with short thorny petiole-rachis axis; d detail of a short thorny petiole-rachis axis; e winged hypanthium covering the fruit; f trasversal section of the hypanthium and fruit. Tetraglochin alata var. ameghinoi—g winged hypanthium covering the fruit; h trasversal section of the hypanthium and fruit. a–b, e–f from Gentili 162; c–d from Morrone 6032; g–h from Zuloaga 13961.
FIGURE 9. Tetraglochin inermis—a in Taxonomic revision of the genus Tetraglochin (Rosaceae, Rosoideae) and morphometric analysis of its species
FIGURE 9. Tetraglochin inermis—a general aspect of the plant; b detail of a leaf of a macroblast, showing the sheating base and the leaflets (petiole-rachis axis absent); c detail of a flower and leaves; d globose hypanthium with narrow wings, covering the fruit; e trasversal section of the hypanthium and fruit. a–e from Zuloaga et al. 13169.
Data from: Molecular phylogeny and morphological analysis of Tetraglochin (Rosaceae: Rosoideae: Sanguisorbeae) and recognition of the new species T. andina
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Data from: Ecological and spatial patterns associated with diversification of the shrub genus Tetraglochin along Southern-Central Andes (Rosaceae)
Open the record for dataset details and reuse information.
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