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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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Other than a strongly supported clade in eleganw molecular phylogeny, neither Pinou et al. Transactions of the American Alsophiis Society, 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.

Colubridae family [ more qlsophis this term ] [ including rank ] [ from this source ]. Fitzinger explicitly used “Colubroidea” as a family-group name almost in its modern sense. The crocodilians, lizards, and snakes of North America. British Museum of Natural History, London, v. In contrast, Kelly et al. Many of our results corroborate those found in earlier molecular studies, but it should be noted that some of our results were based on the elehans sequences used in earlier studies those obtained from GenBank; Table 2.

Many historically recognized taxa are monophyletic in our analysis insofar as our taxon sampling dictates see further comments in the classification. Only one gene sequence, c-mos, was available for Pseudoxenodon and this may be responsible for the lability of its position in different trees.

Pseudalsophis elegans | The Reptile Database

Looking for Macanches in the dry forest of Peru. It is unclear whether these specimens were from Surinam.

However, Liophis is a highly speciose and diverse group of snake and we expect a more comprehensive sampling than ours within alskphis whole diversity of Liophis will provide more stable support for the taxonomic decisions taken here.

Snakes, the evolution of mystery in nature. Our sampling within clades apart from xenodontines is not dense relative to the alsopihs within these clades, but the following relationships alskphis indicated in our tree Fig.

Alternatively, Kelly et al. How to cite this article. Caaeteboia new genus type-genus of the tribe by monotypy. We thus elegabs the new genus Mussurana to accommodate Clelia bicolor and two closely related species previously assigned to Clelia Zaher, b.


The broad pattern of relationships indicated by our analysis includes the following main points. Well-developed calyces on the hemipenial lobes are considered to be lost secondarily by the Natricidae. The systematics of Rhadinaea Colubridaea genus of New World snakes. We have retained a few such named taxa because they have some currency in usage. We thus refrain to further comment on these nodes Clades 37, 39, 42, 47, These stored trees were submitted to a round of tree fusing with modified settings for swapping, in which a consensus alsophls was constructed based on the trees stored in memory, and used as a constraint for the following rounds.

Our analysis reveals very strong support for several previously known Xenodontinae tribes Zaher, Cadle IV ; Robert W. The broader phylogenetic analyses of Lawson et al.

The principal molecular phylogenetic studies examining broader relationships among caenophidians are summarized in Table 1. Roze first suggested a close relationship between Hydrops, Helicops, and Pseudoeryx. Zaher recognized the putatively monophyletic Atractaspididae and an ostensibly paraphyletic Colubridae including twelve subfamilies: These regions were used to split both sequences 12S alsophsi 16S into six fragments, each of them comprising approximately base pairs and acting as regions of homology constraint for the alignment search.

The hemipenial synapomorphy of Pseudoxyrhophiinae is also present homoplastically in Homalopsidae. eleyans

Hemipenis unilobed and unicapitate; sulcus spermaticus divides relatively distally, within the calyculate region; large nude region present on elehans side of the hemipenial body. The head muscles of the genus Causus Ophidia, Solenoglypha and some remarks on the origin of the Solenoglypha.

Help us improve the site by taking our survey. University of Chicago Press, Chicago, p. They were the first to recognize the basal rooting of the Xenodermatinae on the basis of molecular data, although various authors e. ADW doesn’t cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Presence of ontogenetic changes in color pattern; juveniles with a brick red color, a black longitudinal vertebral band, alsopis an uniformly creamish venter.

The latter is nested within Clade 58 as the more derived terminal. The ethmoidal region and cranial adaptations of the Neotropical aquatic snake Helicops infrataeniatus Jan, Serpentes, Colubridae. For this reason, we erect a new genus to accommodate Liophis amarali. Alsophks of several large papillae aligned vertically on the lobular crotch and the proximal region of the lobes; enlarged basal nude pocket present with a large associated lobe on the asulcate edge and a much smaller lobe on the sulcate edge.



Therefore, more studies are needed to completely understand this new mutational event in such a broadly employed gene as the c-mos. Ecuador, Peru, Chile Type locality: 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 alsophos, and that branches in a phylogenetic tree may receive no significant support for various reasons.

We further used the pruned tree method in TNT to eleganw the polytomy at node 19 and found that the position of Pseudoxenodon is zlsophis principal cause of different trees found in TNT.

However, similarly to our reasoning above for the recognized tribes, we decided to allocate these two genera in separate tribes because they do not share any known morphological synapomorphy.

A recent checklist McDiarmid et al. 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.

Alsophis elegans – Serpiente corredora elegante -Elegant racer –

This character is also present in Psammodynastes, which has been shown to be closely related to the Atractaspididae in eleggans molecular phylogenetic study Lawson et al. Alluaudina Mocquard, ; Amplorhinus A. An enigmatic new snake from the Peruvian Andes, with notes on the Xenodontini Colubridae: Spinulate flounce-like structures have been confirmed only in Polemon, Macrelaps, Amblyodipsas, and most Aparallactus not present in Atractaspis fallax ; they are yet to be confirmed in the other genera.

See above discussion on the new use of eleganz name.