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27 results for “Colubrid”
Fig 1 in A Species-Level Phylogeny of Extant Snakes with Description of a New Colubrid Subfamily and Genus
Fig 1. Abridged phylogeny on final dataset of 1652 snake species and seven outgroup taxa displaying higher-level relationships. Maximum-likelihood phylogenetic estimate based on 10 concatenated genes. Tips represent families and sub-families. Commonly recognized higher-level clades are labeled in all caps and bold. Species classified as Lamprophiidae incertae sedis are also shown since they did not place within a subfamily. Node values represent SHL support values. Skeleton of the species tree is displayed on the left, colored and labeled as they appear in Figs 2–10. doi:10.1371/journal.pone.0161070.g001
Fig 3 in A Species-Level Phylogeny of Extant Snakes with Description of a New Colubrid Subfamily and Genus
Fig 3. Phylogenetic tree of Serpentes continued. A) Aniliidae, Tropidophiidae, Calabariidae, Candoiidae, Sanziniidae, Charininae, Ungaliophiinae, Erycidae, and Boidae. Bi) Cylindrophiidae + Anomochilidae, Uropeltidae, Xenopeltidae, Loxocemidae, and Pythonidae. Bii) Bolyeridae, Xenophidiidae, Acrochordidae, Xenodermatidae, and Pareatidae. doi:10.1371/journal.pone.0161070.g003
Fig 7 in A Species-Level Phylogeny of Extant Snakes with Description of a New Colubrid Subfamily and Genus
Fig 7. Phylogenetic tree of Serpentes continued. A) Sibynophiinae and Natricinae. B) Pseudoxenodontinae and Dipsadinae. doi:10.1371/journal.pone.0161070.g007
Fig 9 in A Species-Level Phylogeny of Extant Snakes with Description of a New Colubrid Subfamily and Genus
Fig 9. Phylogenetic tree of Serpentes continued. A) Grayiinae, Calamariinae, Ahaetullinae subfam. nov., and Colubrinae. Bi) Colubrinae continued. Bii) Colubrinae continued. doi:10.1371/journal. pone.0161070. g009
Ecological associations with arboreality during the evolution of body shape in Neotropical colubrid and dipsadid snakes
<p>Morphological evolution is frequently associated with ecological diversification, and ecomorphological patterns often express functional relationships involved in the range of tasks a group of individuals performs in a given environment. In some snakes, morphological traits related to locomotion seem to converge in association with an arboreal lifestyle, although such ecomorphological associations so far have not been described for species-rich lineages such as Colubridae and Dipsadidae. In addition to microhabitat usage, body shape may differ according to activity period if the surface area-to-volume (S/V) ratio differs between diurnal and nocturnal species. In this study, we address evolution of body shape in Colubridae and Dipsadidae from these two perspectives. We measured 61 species of Colubridae and Dipsadidae and classified snakes according to the arboreality degree based on the level of gravity exposure: non-scansorial (terrestrial), eurytopical (broadly arboreal/terrestrial) and stenotopical (narrowly adapted arboreal); and also, according to the activity period as diurnal or nocturnal. We predicted that higher degrees of arboreality and nocturnality represent derived states that evolved in association with slender and narrower bodies with longer tails, and consequently increased S/V ratios. Our ancestral reconstructions suggest that specializations towards arboreality and nocturnality evolved more recently during the diversification processes of these colubrids and dipsadids snakes. Most morphological traits of stenotopical species were similar to those of eurytopical ones, and only differed in relation to non-scansorial snakes, and body tapering in the anterior body region differed between non-scansorial and eurytopical species. We did not identify any morphological associations with activity period, suggesting that body shape in colubrid and dipsadid snakes evolved mostly associated to different degrees of specialization to arboreal habitats.</p>
FIGURE 2 in Three's Company: discovery of a third syntype of Stegonotus lividus, a species of colubrid snake from Pulau Semau, Lesser Sunda Islands, Indonesia, with comments on an unpublished 19 Century manuscript by the naturalist Salomon Müller
FIGURE 2. Scan of an unpublished manuscript page handwritten in April 1829 by Salomon Müller (1804–1864), detailing the description of a new species he intended to name "Coluber lividus."
FIGURE 4 in Three's Company: discovery of a third syntype of Stegonotus lividus, a species of colubrid snake from Pulau Semau, Lesser Sunda Islands, Indonesia, with comments on an unpublished 19 Century manuscript by the naturalist Salomon Müller
FIGURE 4. Paralectotype (MNHN 3414) designated from the original type series of Stegonotus lividus and the only original syntype, for which Duméril et al. (1854) mentioned morphological characters in their description. (A) dorsal and (B) ventral views. The additional images show the specimen's head in (C) dorsal, (D) ventral, (E) left lateral, and (F) right lateral views. Photos by Nicolas Vidal.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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