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- Publications
- Influence
Molecular Systematics and Phylogeny of Old and New World Ratsnakes, Elaphe Auct., and Related Genera (Reptilia, Squamata, Colubridae)
- Urs Utiger, Notker Helfenberger, B. Schätti, Catherine Schmidt, M. Ruf, Vincent Ziswiler
- Biology
- 2002
The phylogenetic relationships of the Holarctic ratsnakes (Elaphe auct.) are inferred from portions of two mitochondrial genes, 12S rRNA and COI. Elaphe Fitzinger is made up of ten Palaearctic… Expand
The Oriental Colubrine Genus Coelognathus Fitzinger, 1843 and Classification of Old and New World Racers and Ratsnakes (Reptilia, Squamata, Colubridae, Colubrinae)
- Urs Utiger, B. Schätti, Notker Helfenberger
- Biology
- 27 May 2013
The phylogenetic relationships of the colubrine genus Coelognathus is examined on the basis of two partially sequenced mitochondrial genes, COI and 12S rRNA. Maximum parsimony reconstructions show… Expand
On the Distribution of Diploid, Triploid, and Tetraploid Green Toads ( Bufo viridis Complex) in South-Eastern Kazakhstan
- L. Borkin, Valery K. Eremchenko, Notker Helfenberger, A. Panfilov, Juri M. Rosanov
- Biology
- 3 May 2013
Two New Species of the Genus Gonydactylus (Sauria: Gekkonidae) from Eastern Nepal
- I. Darevsky, Notker Helfenberger, N. Orlov, K. Shah
- Biology
- 15 October 2011
Two new species of the naked-toed geckos of the genus Gonydactylus are described from Eastern Nepal. A comparison of the described species with another “himalayan” Gonydactylus ( G. khasiensis and… Expand
New Mountain Species of Trimeresurus (Serpentes, Viperidae, Crotalinae) of the «Green» Pit Vipers Group from the Himalayas
- N. Orlov, Notker Helfenberger
- Biology
- 15 October 2011
New species of Trimeresurus of the «green» pit vipers group is described from Himalayas in Central Nepal. Its comparison with the most related mountain species from Tibet, China is given with… Expand
A Contribution to the Indian Trinket Snake, Coelognathus helena (Daudin, 1803), with the Description of a New Subspecies
- P. P. Mohapatra, K. Schulz, Notker Helfenberger, S. Hofmann, S. Dutta
- Biology
- 30 April 2016
We describe and illustrate a new subspecies of the Indian trinket snake, Coelognathus helena (Daudin) from India. The new taxon has long been confused with Coelognathus helena monticollaris (Schulz,… Expand
Morphological Adaptations for Egg-Eating in the Snake Elaphe davidi Sauvage 1884
- Notker Helfenberger, B. Schätti
- Biology
- 16 October 2011
External morphology, skull characters, vertebral structures (hypapophyses) and anatomical features were studied in three colubrid species. Morphological similarities with the stenophagous African… Expand
A new subspecies of Zamenis hohenackeri (Strauch, 1873) (Serpentes: Colubridae) based on morphological and molecular data.
- S. Hofmann, K. Mebert, K. Schulz, Notker Helfenberger, B. Göçmen, W. Böhme
- Biology, Medicine
- Zootaxa
- 4 September 2018
Based on morphological characteristics, two subspecies of the Transcaucasian rat snake (Zamenis hohenackeri) are currently recognized, namely Z. h. tauricus and Z. h. hohenackeri. Both subspecies are… Expand