ALSOPHIS ELEGANS PDF

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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Relationships within clades Our sampling within clades apart from xenodontines is not dense relative to the diversity within these clades, but the following relationships are indicated in our tree Fig.

Frontals and sphenoid forming ventral border of the optic foramen excluding entirely, or nearly so, the parietals ; hemipenial body nude; hemipenial body bearing a pair of longitudinal ridges Zaher, University of California Press, Berkeley. Craniata unranked [ more like this term ] [ including rank ] [ from this source ].

Indeed, Liophis amarali does not share the typical Xenodontini hemipenis, butrather has a semicapiate, semicalyculate hemipenial pattern, typical of Xenodontinae.

Phylogeny, evolutionary history, and biogeography of Oriental-Australian rear-fanged water snakes Colubroidea: Gnathostomata infraphylum [ more like this term ] [ including rank ] [ from this source ]. Based on this hemipenial evidence and in order to render the genera Alsophis, Philodryas, and Antillophis monophyletic, we allocate Alsophis elegans and the Galapagos xenodontine species in a new genus.

We are unaware of any other xenodontines that have such an additional process on the premaxilla.

Alsophis elegans (Tschudi, 1845)

The head muscles of the genus Causus Ophidia, Solenoglypha and some remarks on the origin of the Solenoglypha. A pair of pigmented spots on the palate; posterior region of the palatine bone longer than dental process, behind vomerian process; dorsal elegams of the vomer with a distinct process in which the ligament of alsophsi muscle retractor vomeris is attached; distinct maxillary process of the prefrontal forming a well defined articular area; lateral alsopuis process of the prefrontal hook-like; hemipenis bicalyculate and bicapitate; large lateral spines on the lobular crests; presence of a pair of calycular pockets within the lobular crotch of the hemipenis; enlarged lateral spines of hemipenis extending onto the lobular crests; lobular crests inflated Zaher, b, Transverse processes of premaxilla elegane, and the origin of a very small, thin posteriorly directed process lateral to the vomerine processes.

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We found a frame-shift mutation, a deletion of one nucleotide, at position for the monophyletic group Lystrophis hystricus, Lystrophis dorbignyi and Waglerophis merremi Xenodon neuwiedi was not sequenced for c-mos. We recognize both Stenophis and Lycodryas as valid, but the systematics of these snakes needs revision Cadle, Interrelationships within the elapid radiation still needs to be clarified and, apart from Hydrophiinae, we refrain alsopbis to recognize a formal hierarchical taxonomy for subgroups within this family.

Homoroselaps is associated with atractaspidids. The phylogenetic affinities and classification of alosphis “advanced” snakes have been a matter of debate for decades. Bryson, Murphy et al. We here resurrect Lygophis Fitzinger, to include these species, which were previously allocated to Liophis Wagler, Biological Journal of the Linnean Society, Within Clade 5, viperids and homalopsines are successive sister taxa to all other caenophidians Clade 9.

Source indicates the source of a classification NOT a taxon name.

ADW: Alsophis elegans: CLASSIFICATION

Morphological support for the inclusion of the genera Waglerophis and Lystrophis within Xenodon are compelling and have been described and discussed by ZaherMoura-Leiteand Masiero The other subfamilies were supported by at least one putative morphological synapomorphy. Amino-acid sequences were aligned with Clustal X, using the standard parameters of the Gonnet series matrix. On the other hand, only few morphological complexes have been analyzed thoroughly within snakes, and the paucity of broadly sampled morphological characters alsophus prevented the compilation of a large morphological data matrix.

Liophis is an assemblage of more than 60 species, making it one of the most diverse genera of Alsopnis American colubrids. Although it has a poor bootstrap and Bremer support, this clade is diagnosed by a significant hemipenial feature.

Our search strategy involved three routines designed to explore the space of hypotheses for trees and alignments: Corrections and modifications to Zaher’s generic arrangement followed in several molecular studies, which concentrated on the “boodontine” and psammophiine lineages, and in the placement of the North American xenodontines Pinou et al.

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The hemipenial synapomorphies we list have appeared in very similar form elsewhere eleyans caenophidians. Some of these contributions were designed to evaluate higher-level relationships, while alspohis focus on more restricted assemblages e. However, as pointed out by FrancoBailey characterized adequately the group, justifying thus its authorship of the tribe. Use of the name “Colubridae” for this clade is a much more restricted use elrgans this name than its long-standing use in the literature on caenophidian systematics, in which “Colubridae” generally referred to all caenophidians that were not acrochordids, elapids, or viperids.

An enigmatic new snake from the Peruvian Andes, with notes on the Xenodontini Colubridae: 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. Relationships among African and Eurasian species are largely unresolved.

Molecular systematics of African Colubroidea Squamata: Squamata order [ more like this term ] [ including rank ] [ from this source ]. Catalogue of the snakes in the British Museum, Vol. In many cases, these are clades with strong statistical support in a particular study, given sufficient taxonomic sampling specific details given below. Diapsida [ more like this term ] [ including rank ] [ from this source ]. Alsophis elegans Tschudi, Classification: Nonetheless, we recognize that some names will require changes in definition with improved knowledge of phylogeny, particularly among “colubroid” snakes sensu Romer, A clade that can be diagnosed by at least eight putative morphological synapomorphies: Alsophis genus [ more like this term ] [ including rank ] [ from this source ].

The non-homology of the two structures is indicated by their different orientations proximal to distal. Schwartzophis new genus Type-species: Until a well-supported phylogeny is obtained, we recommend against recognizing Hoser’s new taxonomy.