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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On the other hand, the Galapagos xenodontines and Alsophis elegans share with the Ecuadorian genus Saphenophis a characteristic hemipenial morphology see Zaher, The hemipenial synapomorphies we list have appeared in very similar form elsewhere within caenophidians.
Within Clade 9, two major branches are supported.
Notes on the genus Thamnodynastes. In doing so, he recognized nine genera including three new genera. Systematics Association Special, v. Schwartzophis new genus Type-species: However, Liophis is a highly speciose and diverse group of snake and we expect a more comprehensive sampling than ours within the whole diversity of Liophis will provide more stable support for the taxonomic decisions taken here.
We found no support for a sister group relationship between homalopsines and Homoroselaps Kelly et al. A pair of pigmented spots on the palate; posterior region of the palatine bone longer than dental process, behind vomerian process; dorsal region of the vomer with a distinct process in which the ligament of the muscle retractor vomeris is attached; distinct maxillary process of the prefrontal forming a well defined articular area; lateral nasal 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, Several recent studies have addressed the classification of caenophidians based on molecular studies reviewed in the Introduction.
Taxon Term is the data value of either a classification term “Animalia” or classification metadata such as name authors. We do not have a clear explanation for this frame-shift mutation, because the first deletion inserts a stop codon at position AA sequenceprobably disabling the c-mos protein. Until a well-supported phylogeny is obtained, we recommend against recognizing Hoser’s new taxonomy.
However, there are indications from both molecular Cadle, b; Mulcahy, and morphological Peters, ; Myers, ; Cadle, b, ; Oliveira et al. Zaher discussed the variation regarding the sulcus spermaticus in colubroid snakes.
Biogeography and evolution of the Galapagos: Molecular systematics and evolution of Regina and the thamnophiine snakes. Spinulate flounce-like structures are also present on the hemipenial lobes of some atractaspidid genera Zaher,and might represent a synapomorphy uniting this family with the Lamprophiinae.
Snakes, the evolution of mystery in nature. It is unclear whether these specimens were from Surinam.
HZ is deeply indebted to Sylvia Morafka for her hospitality and collaboration during his stay in San Francisco. Taxonomic revision of the Liophis lineatus complex Reptilia: In discussing our results we use informal designations for clades that follow generally recognized familial or subfamilial categories for caenophidians e. As a first principle, we recognize as formal taxonomic categories those clades that have received broad support from either morphological or molecular phylogenetic studies.
However, a more thorough analysis of the phylogenetic affinities of Thermophis is still needed in order to clearly place this genus in respect to the Dipsadidae. The resultant dynamic homologies were transformed into static homologies and the implied alignment was exported elegns Hennig86 format. See above discussion on the new use of this name. 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.
On the other hand, only few morphological complexes have been analyzed thoroughly within snakes, and the paucity of broadly sampled morphological characters has prevented the compilation of a large morphological data matrix.
The major salient points alsophsi our analysis are: We assume the monophyly for the specific category to construct our matrix, so we combined sequences from different specimens to compose our specific terminals Table 2. Animalia kingdom [ more like this term ] [ including rank ] [ from this source ] Chordata phylum [ more like this term ] [ including rank ] [ from this source ] Reptilia class [ more like this term ] [ including rank eoegans [ from this source ] Squamata order [ more like this term ] [ including rank ] [ from this source ] Colubridae family [ more like this term ] [ including rank ] [ from this source ] Pseudalsophis genus [ more like this term ] [ including rank ] [ from this source ] Pseudalsophis elegans species [ more like this term ] [ including rank alosphis [ from this source ] Data from source ITIS [ Classifications ] [ Top ] last update: However, its dipsadid hemipenial morphology, the presence of a well-developed septomaxillary-frontal articulation, and previous immunological studies do not support the latter hypothesis Cadle, asuggesting dipsadid affinities instead see also discussion above in Xenodermatidae.
Alsophis – Wikispecies
Expanded alsopjis zygapophyses and neural spines have appeared convergently among dipsadids e. Zaher also elevated all the subspecies of Galapagos snakes recognized by Thomas to species status.
Antillophis parvifrons Cope, Azemiops was a sister clade to Viperinae in the study of Kelly et al. The name Elapoidea was used by Pinou et al. Molecular systematics of neotropical cat-eyed snakes: Zaher recognized the putatively monophyletic Atractaspididae and an asophis paraphyletic Colubridae including twelve subfamilies: This character is only weakly developed in Oxyrhabdion and does not unambiguously support its relationship to other xenodermatines.
ADW: Alsophis elegans: CLASSIFICATION
Xenodermatid snakes in America. Papilla present medially in the crotch at the base of the hemipenial lobes lost in some alsophiines, e. Elegas best trees and suboptimal trees with fewer than five extra steps were stored. Rhinokinetic snout of thamnophiine snakes.
Alsophis elegans – Serpiente corredora elegante -Elegant racer –
Description du comportement de ‘frottement’ et notes sur la reproduction et la fonction maxillaire de la couleuvre de Montpellier Malpolon monspessulanus. Nonetheless, an association between Acrochordus and xenodermatines is an alsophus hypothesis, as, for example, expressed in Boulenger 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 Eleganw Zaher, Named after Vincent J.
Well-developed calyces on the hemipenial lobes are considered to be lost secondarily by the Natricidae.
Our results are not surprising given the complicated taxonomic history of these snakes. The phylogeny and classification of caenophidian snakes inferred from seven nuclear protein-coding genes.