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4,937 results for “Endemic species”
FIGURE 1 in Kalanchoe benbothae (K. subg. Fernandesiae; Crassulaceae subfam. Kalanchooideae), a new southern African species endemic to KwaZulu-Natal in the Maputaland-Pondoland Region of Endemism
FIGURE 1. Kalanchoe benbothae from Vaalbank, KwaZulu-Natal, South Africa. A. Inflorescence section lateral view. B. Pseudo-rosette base of a flowering plant. C. Flower of K. benbothae (left) and K. luciae (right) lateral view. D. Flower of K. benbothae (left) and K. luciae (right) dorso-lateral view. E. Pistil with squamae of K. benbothae (left) and K. luciae (right). F. Ben Botha (1961–) for whom the species is named. Scale bars: A: 4 mm; B: 25 mm; C–D: 8 mm; E: 4 mm. Photographs by the authors (A–E) and B.A. Botha (F).
FIGURE. Morphological diversity of flowers and leaves in New Zealand spider orchids (Corybas). Labellum (A: C. hypogaeus, B: C. macranthus, C: C. papa); dorsal sepal (D: C. hypogaeus, E: C. confusus, F: C. papillosus), leaf (G: C. hypogaeus, H: "trotters", I: C. confusus, J: C. orbiculatus, K: C. acuminatus). Scale bar = 5 mm in Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade
FIGURE. Morphological diversity of flowers and leaves in New Zealand spider orchids (Corybas). Labellum (A: C. hypogaeus, B: C. macranthus, C: C. papa); dorsal sepal (D: C. hypogaeus, E: C. confusus, F: C. papillosus), leaf (G: C. hypogaeus, H: "trotters", I: C. confusus, J: C. orbiculatus, K: C. acuminatus). Scale bar = 5 mm
FIGURE. Median network analyses (MNA) of a subset of the C. trilobus aggregate (i.e. those in the clade A from Fig. 11) based on concatenated DNA sequence data from ITS, trnL-trnF and psbJ-petA. Stars and arrow indicate accessions discussed in the text. NI: North Island, SI: South Island. in Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade
FIGURE. Median network analyses (MNA) of a subset of the C. trilobus aggregate (i.e. those in the clade A from Fig. 11) based on concatenated DNA sequence data from ITS, trnL-trnF and psbJ-petA. Stars and arrow indicate accessions discussed in the text. NI: North Island, SI: South Island.
FIGURE 0. Corybas wallii, a in Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade
FIGURE 0. Corybas wallii, a new species of spider orchid endemic to New Zealand. A. Plant in the wild. B. Close up of the labellum. C. Side view of the flower. D. Distribution. Scale bar = 5 mm.
FIGURE. Bayesian tree of New Zealand spider orchids (Corybas) based on DNA sequence data from ITS, trnL-trnF and psbJ-petA. Major clades are indicated by open bars and capital letters, members of the C. trilobus aggregate are shaded, and posterior probabilities/ bootstrap percentages (≥50) indicated by numbers near each node. NI: North Island, SI: South Island, MCQI: Macquarie Island, CHI: Chatham Island in Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade
FIGURE. Bayesian tree of New Zealand spider orchids (Corybas) based on DNA sequence data from ITS, trnL-trnF and psbJ-petA. Major clades are indicated by open bars and capital letters, members of the C. trilobus aggregate are shaded, and posterior probabilities/ bootstrap percentages (≥50) indicated by numbers near each node. NI: North Island, SI: South Island, MCQI: Macquarie Island, CHI: Chatham Island
FIGURE. Canonical variate analysis of Corybas trilobus s.s., C. obscurus ("darkie") and C. wallii ("triwhite"). in Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade
FIGURE. Canonical variate analysis of Corybas trilobus s.s., C. obscurus ("darkie") and C. wallii ("triwhite").
FIGURE. Canonical variate analysis of Corybas hypogaeus, C. obscurus ("darkie"), C. wallii ("triwhite") and two variants of the C. trilobus aggregate ("Rimutaka", "Trotters") in Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade
FIGURE. Canonical variate analysis of Corybas hypogaeus, C. obscurus ("darkie"), C. wallii ("triwhite") and two variants of the C. trilobus aggregate ("Rimutaka", "Trotters")
FIGURE 2 in A new endemic species of Acanthocereus (Cactaceae) from southern Jalisco, Mexico
FIGURE 2. Illustration of Acanthocereus atropurpureus. A: habit and growth form. B: detail of the mature stem. C: cross-section of the mature stem. D: areole and spines. E: young plant (from seedling). F: close-up of the young stem (new growth from the mature stem). G: close-up of the flower bud. H: longitudinal section of the flower. I: fruit attached to the stem. J: longitudinal section of the fruit. K: seed and close-up of the testa seed.
FIGURE 3 in A new endemic species of Acanthocereus (Cactaceae) from southern Jalisco, Mexico
FIGURE 3. Comparison of mature stem and flower morphology of Acanthocereus atropurpureus and close species. A and E: A. castellae. B and F: A. atropurpureus. C and G: A. cuixmalensis. D and H: A. paradoxus. I: Plantlets of A. atropurpureus (top) and A. paradoxus (bottom). J: Growing apices of A. atropurpureus (top) and A. paradoxus (bottom). K: Mature stems of A. atropurpureus (left) and A. paradoxus (right) under hydric stress. L: Mature stems of A. atropurpureus (left) and A. paradoxus (right) stems under continuous watering.
FIGURE 4. Magnolia mixteca. A. Flowering branch showing the basal yellowish petal spots. B in Corncob flower, Magnolia mixteca (M. sect. Macrophylla, Magnoliaceae) a new species endemic to the Alto Balsas Basin (Baja Mixteca), in the Pacific slopes of Oaxaca, Mexico
FIGURE 4. Magnolia mixteca. A. Flowering branch showing the basal yellowish petal spots. B. Androecium (basal) showing the stamens and gynoecium (apical) in female phase, before pollination, showing the styles. C. Gynoecium in male phase after pollination, without stamens, showing the staminal axis and ovary of basal carpels. (Photos Reyna Domínguez Yescas and Ciro Rodríguez Pérez.)
FIGURE 2. Magnolia mixteca. A in Corncob flower, Magnolia mixteca (M. sect. Macrophylla, Magnoliaceae) a new species endemic to the Alto Balsas Basin (Baja Mixteca), in the Pacific slopes of Oaxaca, Mexico
FIGURE 2. Magnolia mixteca. A. Leaf, adaxial side, with large stipules. B. Flower bud. C. "Corncob" flower bud. D. Spathaceous bract. E. Leaf, abaxial surface. (Photos Ciro Rodríguez Pérez.)
FIGURE 1 in Corncob flower, Magnolia mixteca (M. sect. Macrophylla, Magnoliaceae) a new species endemic to the Alto Balsas Basin (Baja Mixteca), in the Pacific slopes of Oaxaca, Mexico
FIGURE 1. Distribution of Magnolia sect. Macrophylla in the Mexican biogeographical provinces (Morrone 2017). The new species, M. mixteca, has the southernmost location in the only watershed draining into the Pacific Ocean.
Data from: The demographic history of micro-endemics: Have rare species always been rare?
<p>Extinction has increased as human activities impact ecosystems. Conservation assessments for the IUCN red list are a fundamental tool in aiding the prevention of further extinction, yet, relatively few species have been thoroughly assessed. To increase the efficiency of assessments, novel approaches are needed to highlight threatened species that are currently data deficient. Many Madagascan plant species currently have extremely narrow ranges, but this may not have always been the case. To assess this, we used high-throughput DNA sequencing for 2-5 individuals of each species - reflecting the paucity of samples available for rare species. We estimated effective population size (<em>N</em><sub><em>e</em></sub>) for each species and compared this to census population <em>(N</em><sub><em>c</em></sub>) sizes when known. In each case, <em>N</em><sub><em>e</em></sub> was an order of magnitude larger than <em>N</em><sub><em>c</em></sub> – a signature of rapid, recent population decline. We then estimated the demographic history of each species, tracking changes in <em>N</em><sub><em>e</em></sub> over time. Five out of ten species displayed significant population declines towards the present (68–90% decreases). Our results for palm trees indicate that it is possible to predict extinction risk, particularly in the most threatened species. We performed simulations to show that our approach has the power to detect population decline during the Anthropocene, but performs less well when less data is used. Similar declines to those in palms were observed in data deficient species or those assessed as of least concern. These analyses reveal that Madagascar's narrow endemics were not always rare, having experienced rapid decline in their recent history. Our approach offers the opportunity to target species in need of conservation assessment with little prior information, particularly in regions where human modification of the environment has been rapid.</p>
Pronounced genetic separation among varieties of the Primula cusickiana species complex, a Great Basin endemic
<p>Distinguishing between populations with strong genetic structure and unique species is a common challenge in systematics, especially for taxa occurring in fragmented habitats where allopatric speciation may be widespread and distinct groups may be morphologically similar. Such is often the case with species complexes across sky island environments. In these scenarios, biogeography may help to explain the taxonomic relations between species complex members, and restriction site-associated DNA (RAD) sequencing methods are commonly used to compare closely related species across thousands of loci. Here we use RADseq to clarify the boundaries separating the geographically distinct but morphologically similar varieties of the Primula cusickiana species complex, and to contextualize past findings of strong genetic structure among populations within varieties. Our genetic analyses demonstrate pronounced separation between isolated populations of this Great Basin endemic, indicating that the current varietal classification of complex members is inaccurate, and emphasizing their conservation importance. We discuss how these results correspond to recent biogeographical models used to describe the distribution of other sky island taxa in western North America. Our findings also fit into a wider trend observed for alpine Primula species complexes, and we consider how edaphic specialization and heterostylous breeding systems may be contributing to frequent diversification via allopatric speciation in this genus. </p>
FIGURE 1. Calliandra estebanensis H.M. Hern. A in A narrowly endemic new species of Calliandra series Racemosae (Fabaceae) from Sinaloa, Mexico
FIGURE 1. Calliandra estebanensis H.M. Hern. A. Branchlet with inflorescence at anthesis and developing pod. B. Leaflet. C. Detail of calyx and corolla. D. Dissected flower showing the staminal tube and pistil. E. Detail of the ovary. F. Pod. Vouchers: A–E, E. Martínez et al. 4180 (MEXU); F, H.S. Gentry 6330-A, (MEXU). Drawn by Albino Luna.
FIGURE 2. Unacetolyzed 8 in A narrowly endemic new species of Calliandra series Racemosae (Fabaceae) from Sinaloa, Mexico
FIGURE 2. Unacetolyzed 8-grained polyad of Calliandra estebanensis. Voucher: E. Martínez et al. 4180 (MEXU). Scale bar = 100 μm.
FIGURE 4 in Centaurea peltieri (Asteraceae), a new endemic species from the Oriental High Atlas of Morocco
FIGURE 4. Shape of appendages of middle involucral bracts of C. peltieri (A), C. takredensis (B), C. atlantis (C) and C. gattefossei (D) and C. oriolii-bolosii (from holotype!) (E).
FIGURE 3 in Centaurea peltieri (Asteraceae), a new endemic species from the Oriental High Atlas of Morocco
FIGURE 3. Shape of middle involucral bracts and their appendage of C. peltieri (A), C. takredensis (B), C. atlantis (C), C. gattefossei (D) and C. oriolii-bolosii (from holotype!) (E).
FIGURE 2 in Centaurea peltieri (Asteraceae), a new endemic species from the Oriental High Atlas of Morocco
FIGURE 2. Centaurea peltieri. Plant (A), involucral bracts outer (B), middle (C) and inner (D), leave (E), achene (F), capitula (G), outer sterile flower (H), inner fertile flower (I).
FIG. 1. Drymonia mexicana Clavijo & J.L. Clark.A in DRYMONIA MEXICANA (GESNERIACEAE), A NEW ENDEMIC SPECIES FROM VERACRUZ (MEXICO) Laura Clavijo
FIG. 1. Drymonia mexicana Clavijo & J.L. Clark.A. Habit featuring glabrous foliage and dorsal view of the flower. B. Lateral view of flower.C.Front view of corolla. D. Lateral view of flower. (Photographic images of cultivated material: A, C, D, J.L. Clark 6282; B, Richard Dunn,without collection number).
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.