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799 results for “island endemism”
Data from: Paleo-islands as refugia and sources of genetic diversity within volcanic archipelagos: The case of the widespread endemic Canarina canariensis (Campanulaceae)
Geographical isolation by oceanic barriers and climatic stability has been postulated as some of the main factors driving diversification within volcanic archipelagos. However, few studies have focused on the effect that catastrophic volcanic events have had on patterns of within-island differentiation in geological time. This study employed data from the chloroplast (cpDNA haplotypes) and the nuclear (AFLPs) genomes to examine the patterns of genetic variation in Canarina canariensis, an iconic plant species associated with the endemic laurel forest of the Canary Islands. We found a strong geographical population structure, with a first divergence around 0.8 Ma that has Tenerife as its central axis and divides Canarian populations into eastern and western clades. Genetic diversity was greatest in the geologically stable 'palaeo-islands' of Anaga, Teno and Roque del Conde; these areas were also inferred as the ancestral location of migrant alleles towards other disturbed areas within Tenerife or the nearby islands using a Bayesian approach to phylogeographical clustering. Oceanic barriers, in contrast, appear to have played a lesser role in structuring genetic variation, with intra-island levels of genetic diversity larger than those between-islands. We argue that volcanic eruptions and landslides after the merging of the palaeo-islands 3.5 Ma played key roles in generating genetic boundaries within Tenerife, with the palaeo-islands acting as refugia against extinction, and as cradles and sources of genetic diversity to other areas within the archipelago.
FIGURE 3 in Allopatric color forms of Scaphidium morimotoi Löbl, 1982 (Coleoptera, Staphylinidae, Scaphidiinae) endemic to the Amami Islands, the Ryukyus, Japan
FIGURE 3. Habitus of Scaphidium morimotoi. a, b, Specimens from the island Yoro-shima (left, dorsal view; right, lateral view); c, d, specimens from the island Amami-ôshima (left, dorsal view; right, lateral view); a, c, d, female; b, male.
FIGURE 5 in Allopatric color forms of Scaphidium morimotoi Löbl, 1982 (Coleoptera, Staphylinidae, Scaphidiinae) endemic to the Amami Islands, the Ryukyus, Japan
FIGURE 5. Male and female genitalia of Scaphidium morimotoi. a, b, Male genitalia from dorsal view; c, d, female genitalia from ventral view. a, c, Specimen from the island Yoro-shima; b, d, specimen from the island Amami-ôshima. Scales: 0.25 mm.
FIGURE 4 in Allopatric color forms of Scaphidium morimotoi Löbl, 1982 (Coleoptera, Staphylinidae, Scaphidiinae) endemic to the Amami Islands, the Ryukyus, Japan
FIGURE 4. Everted internal sac and antennae of Scaphidium morimotoi. a–d, i, Specimen from the island Yoro-shima; e–h, j, specimen from the island Amami-ôshima. a–d, e–h, Everted internal sac; a, e, ventral view; b, f, lateral view; c, g, dorsal view; d, h, apical view (from apex toward base); i, j, antennae of female. Scales: 0.5 mm.
FIGURE 2 in Allopatric color forms of Scaphidium morimotoi Löbl, 1982 (Coleoptera, Staphylinidae, Scaphidiinae) endemic to the Amami Islands, the Ryukyus, Japan
FIGURE 2. Phylogenetic relationships of Scaphidium morimotoi with three related species. Maximum likelihood bootstrap values>50% are shown above branches. Scale: differences of 5% of base pairs are shown.
FIGURE 3 in A new Canariella species (Gastropoda: Helicoidea: Hygromiidae) of the new subgenus Majorata, both endemic to the Jandía Peninsula (Fuerteventura, Canary Islands)
FIGURE 3. Scatter plots of some shell measurements for Canariella jandiaensis sp. nov. and C. eutropis. Abbreviations same as in Fig. 2.
FIGURE 5. Genital system and details. A in A new Canariella species (Gastropoda: Helicoidea: Hygromiidae) of the new subgenus Majorata, both endemic to the Jandía Peninsula (Fuerteventura, Canary Islands)
FIGURE 5. Genital system and details. A. Canariella jandiaensis sp. nov., from Morro del Cavadero (an AIT paratype). B. C. eutropis, from Morro del Cavadero (taken from Ibáñez et al. 1995, fig. 38). a, general appearance of the whole genital system; at, atrium; ag, albumen gland; b, detail of the distal female duct; bc, bursa copulatrix; c, detail of the distal male duct; d, epiphalluspenis diagram (without scale); e, vaginal crosssection diagram; with arrangement of vaginal glands (without scale); ef, epiphallar fold; ep, epiphallus; f, detail of the evaginated penis; showing the penial papilla; fl, flagellum; o, free oviduct; p, penis; pi, pilaster; pp, penial papilla (also marked with asterisk); ps, pseudopapilla (also marked with arrow); r, retractor muscle; s, sheath; v, vagina; vd, vas deferens; vg, vaginal gland.
FIGURE 4. Shells and living specimens. A in A new Canariella species (Gastropoda: Helicoidea: Hygromiidae) of the new subgenus Majorata, both endemic to the Jandía Peninsula (Fuerteventura, Canary Islands)
FIGURE 4. Shells and living specimens. A. Canariella plutonia, from Vega de Río Palmas; B–C. C. jandiaensis sp. nov., from Morro del Cavadero; B. Holotype. D–E. C. eutropis from Solana del Ciervo. Scale bar applies to A, B, D.
FIGURE 1 in A new Canariella species (Gastropoda: Helicoidea: Hygromiidae) of the new subgenus Majorata, both endemic to the Jandía Peninsula (Fuerteventura, Canary Islands)
FIGURE 1. Distribution of Canariella jandiaensis sp. nov. and C. eutropis. Symbols represent 1 x 1 km UTM squares.
FIGURE 6 in Two Canariella species (Gastropoda: Helicodea: Hygromiidae) endemic to the Northwest Tenerife (Canary Islands)
FIGURE 6. Photographs of genital systems. A. Canariella pontelirae. B. C. giustii sp. nov. (both from La Punta, Teno massif, Tenerife). Abbreviations same as in Fig. 5.
FIGURE 3 in Two Canariella species (Gastropoda: Helicodea: Hygromiidae) endemic to the Northwest Tenerife (Canary Islands)
FIGURE 3. Scatter plots of some shell measurements for Canariella pontelirae, C. giustii sp. nov. and C. hispidula. Abbreviations same as in Fig. 2.
FIGURE 1 in Two Canariella species (Gastropoda: Helicodea: Hygromiidae) endemic to the Northwest Tenerife (Canary Islands)
FIGURE 1. Geographic distribution of Canariella pontelirae and C. giustii sp. nov.; symbols represent 1 x 1 km UTM squares.
FIGURE 5 in Two Canariella species (Gastropoda: Helicodea: Hygromiidae) endemic to the Northwest Tenerife (Canary Islands)
FIGURE 5. Drawings of genital systems and details of distal portions. A. Canariella bimbachensis from Las Lajas (El Hierro; taken from Ibáñez et al. 2002, Fig. 1B). B. C. discobolus from Barranco de La Rajita (La Gomera; taken from Ibáñez et al. 1995, Fig. 34). C. C. hispidula from Tabaiba Alta (Tenerife; taken from Ibáñez et al. 1995, Fig. 28). D. C. giustii sp. nov. from La Punta (Teno massif, Tenerife). a, general appearance of the whole genital system; at, atrium; ag, albumen gland; b, detail of the distal female duct; bc, bursa copulatrix; c, detail of the distal male duct; d, epiphalluspenis diagram (without scale); e, vaginal crosssection diagram with arrangement of vaginal glands (without scale); ef, epiphallar fold; ep, epiphallus; f, flagellum; go, genital orifice; o, free oviduct; p, penis; pi, pilaster; pp, penial papilla; r, retractor muscle; s, sheath; t, body tegument; v, vagina; vd, vas deferens; vg, vaginal gland.
FIGURE 4. A in Two Canariella species (Gastropoda: Helicodea: Hygromiidae) endemic to the Northwest Tenerife (Canary Islands)
FIGURE 4. A. Canariella pontelirae living specimen and shell, from La Punta (Teno massif, Tenerife). B. C. giustii sp. nov., holotype shell. C. C. hispidula shell, from Las Caletillas (Tenerife).
FIGURE 6 in A new endemic species of the subgenus Mus (Rodentia, Mammalia) on the Island of Cyprus
FIGURE 6: Plot of centroid size of skulls against their score on the first principal component (PC1) performed on Procrustes Residuals (GLS surimposition). The TPS deformation grid (magnified six times to make the change visible) depicts the morphological changes from the M. m. domesticus mean shape to that of M. cypriacus for dorsal (A) and ventral (B) views of skull.
FIGURE 4 in A new endemic species of the subgenus Mus (Rodentia, Mammalia) on the Island of Cyprus
FIGURE 4: Dorsal, ventral and lateral views of the holotype (n° 2005988) and paratype 1 (n° 2005989) of Mus cypriacus.
FIGURE 1 in A new endemic species of the subgenus Mus (Rodentia, Mammalia) on the Island of Cyprus
FIGURE 1: Location of the sampling localities for the genetic (black dot) and morphological (empty square) studies.
FIGURE 7 in A new endemic species of the subgenus Mus (Rodentia, Mammalia) on the Island of Cyprus
FIGURE 7: Differentiation of molars and mandible outlines of the Mediterranean species of Mus sp. (A) Mandible; first and second canonical axes (CA1/CA2) with mean outline for each taxa. (B) Relationship between shape (CA1) and size (Ha1 area) of mandibles. (C) First lower molar. CA1/ CA2 with mean outline of each taxon. (D) First upper molar; CA1/CA2 with mean outline of each taxon. Each dot represents a specimen. The anatomical description with morphological terms for molars (following Chaline 1974) and mandibles (following Atchley 1993) is displayed.
FIGURE 2 in A new endemic species of the subgenus Mus (Rodentia, Mammalia) on the Island of Cyprus
FIGURE 2: Location of landmarks on the ventral and dorsal views of the mouse skull. See text for the anatomical description of landmarks.
FIGURE 4 in Redescription of Cirriformia crassicollis (Kinberg, 1866) and Timarete hawaiensis (Hartman, 1956) new combination, (Polychaeta: Cirratulidae), endemic polychaetes to the Hawaiian Islands
FIGURE 4. SEM of Timarete hawaiensis showing: A, anterior end in dorsal view; B, anterior end in lateral view; C, mid-body neuropodium and notopodium; D, anterior end showing branchial and tentacular insertion, abbreviation: brbranchia; E, Pygidium; F, anterior serrated capillary chaetae.
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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)
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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.