last update: globalnames score not available match type not available. author_text: (Tschudi, ) display_name: Alsophis elegans. Expert(s). Expert: Notes: Reference for: Other Source(s). Source: Snake Species of the World, vol. undetermined, manuscript (version ). Acquired: Cryptocercus matilei Grandcolas, in GBIF Secretariat (). GBIF Backbone Taxonomy. Checklist dataset accessed via.
|Published (Last):||15 March 2009|
|PDF File Size:||16.53 Mb|
|ePub File Size:||9.41 Mb|
|Price:||Free* [*Free Regsitration Required]|
Our c-mos sequences had an indel of three base pairs at positions in Acrochordus, Bitis, Calamaria, Colubrinae, Natricinae, Pseudoxenodon, and Xenodontinae; this indel is equivalent to that reported in these same groups by Lawson et al. A new genus and species of snake from the Elefans Drakensberg, South Africa.
Alsophis elegans – Serpiente corredora elegante -Elegant racer –
Our analysis reveals very strong support for several previously known Xenodontinae tribes Zaher, The classification of the Ophidia. Although it has a poor bootstrap and Bremer support, this clade is diagnosed by a significant hemipenial feature. Caraiba, in allusion to the “mar das Caraibas,” a Portuguese designation of the Caribbean region, gender feminine. Xenodontinae subfamily [ more like this term ] [ including rank ] [ from this source ].
IUCN Red List of Threatened Species
Biogeography and evolution of the Galapagos: Reptilia unranked [ more like this term ] [ including rank ] [ from this source ]. The phylogenetic relationship of Colubrinae, Elapidae and Viperidae and the evolution of front-fanged venom systems in snakes. Spines of the hemipenial body arrayed in transverse rows connected basally by tissue, forming spinulate flounce-like structures less developed in some taxa such as Bothrolycus Zaher, Data from source Union 4 [ Classifications ] [ Top ] last update: We used the information on translation sequence available in NCBI GenBank and the frame-shift of the sequences to define the starting position for the codon according to which we translated all DNA sequences to amino-acid sequences.
Higher-level relationships of caenophidian snakes inferred from four nuclear and mitochondrial genes. A simple sulcus spermaticus is present in some dipsadines as a further derived condition. Sarcopterygii class [ more like this term aosophis [ including rank ] [ from this source ]. Class Reptilia turtles, snakes, lizards, and relatives. However, morphological data for caenophidians are scant for many taxa and in general is widely scattered.
WilliamsJeff Boundy For xenodontines sensu lato Clade 25 we defer many of our comments elegzns the section on classification. Based on our molecular analysis, we present a revised classification for caenophidians and provide morphological diagnoses for many of the included clades; we also highlight groups where much more work is needed.
The Animal Diversity Web online. Looking for Macanches in the dry forest of Peru. When making taxonomic changes we maintain current usage of names as far as alsophix and opted for conservative adjustments to meanings of long-standing names.
Phylogenetic relationships among advanced snakes: No molecular study, including ours, has sampled more than one or two species of xenodermatids. Phylogenetic relationships of North American garter snakes Thamnophis based on four mitochondrial genes: Comments on the M.
A similar character exists in some Lamprophiidae, but in this case the flounces extend to the hemipenial body. The broader phylogenetic analyses of Lawson et al.
Most especially, the position of the Psammophiidae is unstable and might render the Elapoidea, as presently understood, paraphyletic. Systematics of snakes of the genus Geodipsas Colubridae from Madagascar, with descriptions of new species and observations on natural history. More recently, molecular studies have provided new insights on the higher-level phylogeny of caenophidians, corroborating some long-held views and suggesting new hypotheses for eleganw e.
A core of species has been associated with the tribe Xenodontini see Myers, but the genus has also been a repository for generalized colubrids whose affinities with other snakes are unclear e. We also assume, following Zaherthat the other Neotropical genera Crisantophis, Diaphorolepis, Emmochliophis, Enuliophis, Enulius, Hydromorphus, Nothopsis, Rhadinophanes Synophis, and Tantalophis which have a dipsadid hemipenial morphology, belong within Dipsadidae, and we place them here incertae sedis.
Taxonomy of caenophidians, with a focus on xenodontines Elegahs present taxonomic arrangement refers only to the “colubroid” radiation, with special emphasis on the “New World xenodontine” radiation of snakes. However, they form two successive sister groups nodes 56 and 57 to a clade including the genera Xenodon, Waglerophis, and Lystrophis. Within Clade 5, viperids and homalopsines are successive sister taxa to all other caenophidians Clade 9.
Centre National de la Recherche Scientifique, Paris.
These stored trees were submitted to a round of tree fusing with modified settings for swapping, in which a consensus tree was constructed based on the trees stored in memory, and used as a constraint for the following rounds.
Thus, rather than indicating an ambiguous phylogenetic placement alsophiw Xenodermatinae, the molecular and morphological data for Oxyrhabdium suggest to us only that this genus is not phylogenetically associated with other Xenodermatinae as represented by Xenodermus xlsophis Stoliczkia in our study and Vidal et al.
Putative synapomorphies for the group ellegans Many taxa are of uncertain relationships, either because of disagreements among studies due to analytical or sampling issues, unstable phylogenetic position in multiple most parsimonious trees, or simple lack of data.
Biological Journal of the Linnean Society We fully expect that this topology with respect to Acrochordus will be recovered as sampling improves.
We fully recognize that there are still many details of snake phylogeny to be resolved, that results for particular taxa can conflict with one another in different studies, and that branches in a phylogenetic tree may receive no significant support for various reasons. Zoologische Mededelingen 48 Viperids are nested within the successive outgroups of pareatines and xenodermatines, whereas elapids are nested higher in the tree among some primarily-African ‘colubrid’ clades.
For the non-coding sequences rRNAs we conducted a pre-alignment step using the default parameters implemented in Clustal X Thompson et al. We provide commentary where necessary to highlight some of the problems.