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.

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Purification of high quality DNA from shed skin.

Zaher hypothesized that Helicops, Hydrops, and Pseudoeryx formed a clade belonging to his Xenodontinae sensu stricto, although the latter two genera did not present the putative hemipenial synapomorphies of Xenodontinae. Taxonomy of caenophidians, with a focus on xenodontines.

Alsophis elegans – Serpiente corredora elegante -Elegant racer –

Molecular Phylogenetics and Evolution, Prior to presenting our classification of advanced snakes, we make some preliminary comments regarding our approach to formal recognition of clades represented by our phylogeny, and on several recent “readjustments” to the classification of caenophidians.

Alsophis elegans Tschudi, Classification: We sampled 10 species representing 7 genera for Central American xenodontines Dipsadinae and 77 species representing 40 genera for South American xenodontines Xenodontinae sensu stricto. Liophis is an assemblage of more than 60 species, making it one of the most diverse genera of South American colubrids. Hospitality of the Herpetology Department of the California Academy of Sciences during preparation of the manuscript is also greatly appreciated.

The single sulcus spermaticus of colubrids and natricids is considered to have derived from a centrifugally divided sulcus, but in different ways in the two groups McDowell The phylogenetic affinities of Scaphiophis Peters, has been disputed Zaher, ; Vidal et al. West Indian xenodotine colubrid snakes: The conflicting results among these studies might be due to the different strategies of outgroup and ingroup sampling used in these analyses.


ADW: Alsophis elegans: CLASSIFICATION

Reptilium conspectum quae in republica Eleganz reperiuntur er pleraque observata vel collecta sunt in itenere. Increasing gene sampling in a reduced taxon sample can actually reinforce long branch attraction or repulsionand increasing the taxon sampling density will at least help reveal unstable clades within a phylogenetic analysis.

Commentary on recent use of the names Colubroidea, Prosymnidae, Pseudaspididae, and Grayiinae Several recent studies have addressed the classification of caenophidians based on molecular studies reviewed in the Introduction. Molecular systematics and evolution of Regina and the thamnophiine snakes. Our molecular phylogenetic result is corroborated by morphological evidence that also points to a paraphyletic genus Liophis and retrieves a clade including both anomalus and lineatus groups of Liophis, supported by their unusual color pattern see Moura-Leite, Alsophis elegans Tschudi, Furthermore, our analysis revealed that the genera Erythrolamprus, on the one hand, and Waglerophis and Lystrophis on the other hand, are nested within the genera Liophis sensu stricto and Xenodon, respectively.

Tropidodryas Fitzinger, type-genus of the tribe b y monotypy. Hoser placed Sistrurus ravus in a new monotypic genus and thus obscured its phylogenetic relationships. Presence of ontogenetic changes in color pattern; juveniles with a brick red color, a black longitudinal vertebral band, and an uniformly creamish venter. Biological Journal of the Linnean Society, Higher-level relationships of snakes inferred from four nuclear and mitochondrial genes.

The broader phylogenetic analyses of Lawson et al.

Magliophis exiguus Cope, new combination. Fitzinger explicitly used “Colubroidea” as a family-group name almost in its modern sense. Our results are consistent with these studies on both Causus and Azemiops. Homalopsidae inferred from mitochondrial and nuclear DNA sequences.

Find more photos by Google images search: Liophis amarali shows no elegana affinities to the genus Liophis or even to the tribe Xenodontini see the new tribe Caaeteboiini for more details. Loss of hemipenial calyces and capitular grooves; Paired nude apical disks on hemipenis; Horizontal neck flattening behavior Myers, They recognized families Colubridae, Elapidae, Homalopsidae, Pareatidae, and Viperidae, and resolved Acrochordus as the sister taxon of all other caenophidians.


Although there is no apparently known morphological evidence supporting this grouping, we here synonymize the genus Erythrolamprus Boie, with Liophis Wagler, in order to retrieve a monophyletic Liophis Boie, Pseudoxenodon karlschmidti Pseudoxenodontinae McDowell, Taxonomic revision of the Liophis lineatus complex Reptilia: Ancestral state estimation and taxon sampling density.

Phylogeny of the Colubroidea Serpentes: Smithsonian Herpetological Information Service, The systematics of Rhadinaea Colubridaea genus of New World snakes. The salivary glands of Aparallactinae Elegan and the venom glands of Elaps Elapidae in relation to the taxonomic status of this genus. Eukaryota above family [ more like this term ] [ including rank ] [ from this source ].

Cases in which parsimony or compatibility methods will be positively misleading. This approach simultaneously reduces the unnecessary proliferation of formal taxonomic names and flags these taxa for further study.

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A summary of snake classification. Our search strategy involved three routines designed to explore the space of hypotheses for trees and alignments: Tweet Please submit feedback about this aleophis to the curator. Schwartzophis new genus Type-species: See Comments under Elegas.

A sulcate maxillary dentition is present unambiguously in the two most basal groups of Endoglyptodonta Viperidae and Homalopsidae ; it reverses in several less inclusive lineages e. Phylogenetic relationships and classification of the Malagasy pseudoxyrhophiine snake genera Geodipsas and Compsophis based on morphological and molecular data.