Samstag, 04 Juli 2020 16:34

KUCH, U. & YUWONO, F. B. (2002)

First record of Brown Snakes Pseudonaja cf. textilis (DUMÉRIL, BIBRON & DUMÉRIL, 1854) from  Papua, Indonesia (Squamata: Serpentes: Elapidae).

HERPETOZOA 15 (1/2): 75-78.

Kurzfassung:

Braunschlangen {Pseudonaja) sind in Australien weit verbreitet und stellen dort eine der medizinisch bedeutsamsten Schlangengattungen dar. Auf der Insel Neuguinea wurden Braunschlangen erstmals 1953 entdeckt. Heute sind sie dort aus einem kleinen Gebiet im Südosten Papua-Neuguineas (Central Province, Milne Bay Province und Oro Province) bekannt. Dieses disjunkte Vorkommen wurde mit einer möglichen unbeabsichtigten Einschleppung während des Zweiten Weltkrieges erklärt. Wir berichten über den Erstnachweis von Braunschlangen - Pseudonaja cf. textilis (DUMÉRIL, BIBRON & DUMÉRIL, 1854) - aus der Gegend um Merauke imSüdosten von Papua (Indonesien), ca. 800 km westlich der bisher bekannten Fundorte. Die Schlangen wurden dort erstmals 1993 gefunden und seitdem regelmäßig gefangen. Mit gegenwärtiger Kenntnis betrachten wir Braunschlangen auf der Insel Neuguinea daher als autochthonen Bestandteil der Fauna und nicht als das Resultat einer kürzlich erfolgten Verschleppung australischer Tiere.

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Samstag, 04 Juli 2020 10:12

BAIG, K. J. & MASROOR, R. (2008)

The snakes of the genus Spalerosophis Jan, 1865 in Indo-Pakistan and Iran.

Herpetozoa 20:109-115

Abstract:

The present studies aimed to resolve some systematic issues related to species of the colubrid snake genus Spalerosophis JAN, 1865. The studies were carried out with particular reference to Spalerosophis atriceps FISCHER, 1885 that has been rated controversially since long among other things because of the incorrect identification of the type locality of Spalerosophis diadema (SCHLEGEL, 1837). The studies conclude that atriceps is an independent species and schirazianus is a junior synonym of Spalerosophis diadema.

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Mittwoch, 11 Oktober 2017 13:35

RYABOV, S.A. & NIKOLAI, L.O. (2010)

Reproductive Biology of Boiga guangxiensis Wen, 1998 (Serpentes: Colubridae)

Asian Herpetological Research 2010, 1(1): 44-47
DOI: 10.3724/SP.J.1245.2010.00044

Abstract:

Up to now, the reproductive biology of most species of the genus Boiga is investigated very little. Important data on the reproductive biology of Boiga guangxiensis were received by us for the first time. The investigations were carried out in Viet Nam during expeditions and in the laboratories of Tula Exotarium in the period between 1998−2000.

The data on the feeding, egg size, incubation, size of hatchings, and juvenile colouration of this species are provided for the first time. In addition, the data on size and ratio of snout-vent length/tail length of this snake are provided based on the Vietnamese samples. Our researches demonstrated that B. guangxiensis is distinguished from most other species of the genus by a number of peculiarities of its reproductive biology. Also, morphological differences between Chinese and Vietnamese individuals of this species were noted.

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Phylogeography And Systematic Revision Of The Egyptian Cobra (Serpentes: Elapidae: Naja Haje) Species Complex, With The Description Of A New Species From West Africa.

Zootaxa. 2236. 1-25. 10.5281/zenodo.190424.

Abstract:

We use a combination of phylogenetic analysis of mtDNA sequences and multivariate morphometrics to investigate the phylogeography and systematics of the Egyptian cobra (Naja haje) species complex. Phylogenetic analysis of mitochondrial haplotypes reveals a highly distinct clade of haplotypes from the Sudano–Sahelian savanna belt of West Africa, and that the haplotypes of Naja haje arabica  form the sister group of North and East African N. h. haje. Multivariate morphometrics confirm the distinctness of the Arabian populations, which are consequently recognised as a full species, Naja arabica Scortecci. The Sudano-Sahelian populations are also found to represent a morphologically distinct taxon, and thus a separate species, which we describe as Naja senegalensis sp. nov. The new species differs from all other members of the N. haje complex by a combination of colour pattern and scalation characteristics (especially higher numbers of scale rows around the neck), and the possession of a unique clade of mtDNA haplotypes. The distribution of the new species includes savanna areas of West Africa, from Senegal to western Niger and Nigeria.

Phylogeography And Systematic Revision Of The Egyptian Cobra (Serpentes: Elapidae: Naja Haje) Species Complex, With The Description Of A New Species From West Africa (PDF Download Available).

Full text available from: https://www.researchgate.net/publication/228655725_Phylogeography_And_Systematic_Revision_Of_The_Egyptian_Cobra_Serpentes_Elapidae_Naja_Haje_Species_Complex_With_The_Description_Of_A_New_Species_From_West_Africa [accessed Oct 4, 2017].

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Coalescent Species Delimitation in Milksnakes (Genus Lampropeltis) and Impacts on Phylogenetic Comparative Analyses.

Systematic Biology (63) 2: 231–250. 01.03.2014. https://doi.org/10.1093/sysbio/syt099


Abstract:

Both gene-tree discordance and unrecognized diversity are sources of error for accurate estimation of species trees, and can affect downstream diversification analyses by obscuring the correct number of nodes, their density, and the lengths of the branches subtending them. Although the theoretical impact of gene-tree discordance on evolutionary analyses has been examined previously, the effect of unsampled and cryptic diversity has not. Here, we examine how delimitation of previously unrecognized diversity in the milksnake (Lampropeltis triangulum) and use of a species-tree approach affects both estimation of the Lampropeltis phylogeny and comparative analyses with respect to the timing of diversification. Coalescent species delimitation indicates that L. triangulum is not monophyletic and that there are multiple species of milksnake, which increases the known species diversity in the genus Lampropeltis by 40%. Both genealogical and temporal discordance occurs between gene trees and the species tree, with evidence that mitochondrial DNA (mtDNA) introgression is a main factor. This discordance is further manifested in the preferred models of diversification, where the concatenated gene tree strongly supports an early burst of speciation during the Miocene, in contrast to species-tree estimates where diversification follows a birth–death model and speciation occurs mostly in the Pliocene and Pleistocene. This study highlights the crucial interaction among coalescent-based phylogeography and species delimitation, systematics, and species diversification analyses.

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Python phylogenetics: inference from morphology and mitochondrial DNA.

Biological Journal of the Linnean Society, 2008, 93 (3), 603–619.
Article first published online: 4 FEB 2008 | DOI: 10.1111/j.1095-8312.2007.00904.x

Abstract:

We used nucleotide sequences from four mitochondrial genes and structural features of the mitochondrial control region, combined with a revised, previously published, morphological data set to infer phylogenetic relationships among the pythons. We aimed to determine which of two competing hypotheses of relationships of the genera Aspidites and Python best explains the evolutionary and bioegeographical history of the family. All analyses of the combined data recover a set of relationships in which (1) the genus Python is paraphyletic with the two east Asian species, P. reticulatus and P. timoriensis, as the sister lineage to the seven Australo-Papuan python genera. We support recognition of a distinct genus for the P. reticulatus + P. timoriensis clade; (2) the remaining species of the genus Python form a clade which is the sister lineage to the remainder of the family; (3) the genus Aspidites is embedded among the Australo-Papuan genera. The seemingly primitive characteristics of Aspidites may be better interpreted as reversals or specializations that have accompanied a switch to burrowing in this genus. Resolution of the relationships among the Australo-Papuan lineages is weak, possibly because of rapid diversification early in the history of the radiation. We assessed the tempo of the Indo-Australian python radiation using a maximum likelihood framework based on the birth–death process. We find strong support for elevated speciation rates during the period when Australia collided with the proto-Indonesian archipelago. The data support an origin for pythons outside Australia, followed by a radiation into Australia during the mid-Tertiary.

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Toward a Tree-of-Life for the boas and pythons: Multilocus species-level phylogeny with unprecedented taxon sampling.

Molecular Phylogenetics and Evolution 71: 201–213 http://faculty.umb.edu/liam.revell/pdfs/Reynolds_etal_2014.MPE.pdf

Abstract:

Snakes in the families Boidae and Pythonidae constitute some of the most spectacular reptiles and comprise an enormous diversity of morphology, behavior, and ecology. While many species of boas and pythons are familiar, taxonomy and evolutionary relationships within these families remain contentious and fluid. A major effort in evolutionary and conservation biology is to assemble a comprehensive Tree-of-Life, or a macro-scale phylogenetic hypothesis, for all known life on Earth. No previously published study has produced a species-level molecular phylogeny for more than 61% of boa species or 65% of python species. Using both novel and previously published sequence data, we have produced a species-level phylogeny for 84.5% of boid species and 82.5% of pythonid species, contextualized within a larger phylogeny of henophidian snakes. We obtained new sequence data for three boid, one pythonid, and two tropidophiid taxa which have never previously been included in a molecular study, in addition to generating novel sequences for seven genes across an additional 12 taxa. We compiled an 11-gene dataset for 127 taxa, consisting of the mitochondrial genes CYTB, 12S, and 16S, and the nuclear genes bdnf, bmp2, c-mos, gpr35, rag1, ntf3, odc, and slc30a1, totaling up to 7561 base pairs per taxon. We analyzed this dataset using both maximum likelihood and Bayesian inference and recovered a well-supported phylogeny for these species. We found significant evidence of discordance between taxonomy and evolutionary relationships in the genera Tropidophis, Morelia, Liasis, and Leiopython, and we found support for elevating two previously suggested boid species. We suggest a revised taxonomy for the boas (13 genera, 58 species) and pythons (8 genera, 40 species), review relationships between our study and the many other molecular phylogenetic studies of henophidian snakes, and present a taxonomic database and alignment which may be easily used and built upon by other researchers.

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Donnerstag, 14 Juni 2018 13:18

VIAL, J. & JIMENEZ-PORRAS, J. (1967)

The Ecogeography of the Bushmaster, Lachesis muta, in Central America.

American Midland Naturalist, 78: 182-187.

Abstract:

The ecological distribution of isthmian Lachesis is analyzed on the basis of its association with vegetation formations. The species is essentially restricted to tropical moist and wet forests in the coastal lowlands of Panama, Costa Rica and southeastern Nicaragua. Tropical dry forest areas have not significantly restricted populational interchange in the past, however, the cooler subtropics have been an effective limiting factor to latitudinal and altitudinal distribution. Present confinement of the bushmaster to the moist tropics is related to its historical origin in Central America, thermal requirements demanded by its large size and oviparous habit of reproduction.

 

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Donnerstag, 14 Juni 2018 20:52

TRUTNAU, L. (2002)

Ungiftige Schlangen - Schlangen im Terrarium.

Band 1, Teil 1.

Band 1, Teil 2.

312+316 Seiten; 248 Farbfotos. 4. neu bearbeitete Auflage. Verlag Ulmer, Stuttgart. ISBN-3-8001-3223-0.

Verlagstext:

Dieses Standardwerk liegt nun in der vierten, vollkommen überarbeiteten und stark erweiterten Auflage vor. Im ersten Teil werden folgende Kapitel behandelt:
- Schlangen in der Natur und in menschlicher Obhut
- rechtliche Fragen der Schlangenhaltung (von Rechtsanwalt Dietrich Rössel)
- Krankheiten der Schlangen
- Familie Xenopeltidae (Regenbogenschlangen)
- Familie Boidae (Riesenschlangen)
- Familie Acorchirdidae (Warzenschlangen)
- Familie Colubridae (Nattern)
Gattungen Natrix, Nerodia, Amphiesma, Rhabdobis, Xenochropis, Thamnophis, Tropidonophis.
Der zweite Teil enthält:
- Unterfamilie Natricinae ( Wassernattern und Verwandte)
- Unterfamilie Xenodontinae (Ungleichzähnige Nattern)
- Unterfamilie Colubrinae (Land- und Baumnattern)

 

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Donnerstag, 14 Juni 2018 12:32

MEHRTENS, J. M. (1993)

Schlangen der Welt – Lebensraum, Biologie, Haltung.

Übersetzung ins Deutsche und Bearbeitung: T. Romig..

463 Seiten, Farbfotos. Verlag Franckh-Kosmos, Stuttgart. ISBN 3-440-06710-6.

Kundenrezension:

Diese Buch enthält eine Vielzahl verschiedener Schlangenarten aus aller Welt. Jede Art ist mit Foto, Habitat, Unterarten, Frabformen & Haltungsbedingungen aufgeführt. Allerdings handelt es sich nicht um eine detaillierte wissenschaftliche Abhandlung über die einzelnen Arten. Auf eine Seite kommen ca. 1 bis 3 Arten, bekanntere Arten werden auf mehreren Seiten beschrieben. Auch Beutespektrum und Giftigkeit sind beschrieben. Das Buch gibt Auskunft über Terrarieneinrichtung, Klima und natürliche Umgebung. Verständlich und kurzweilig geschrieben würde ich es jedem Laien nahe legen, der "über den Tellerrand" der eigenen gehaltenen Arten hinaus blicken möchte.

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