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Featured researches published by Claudia Koch.


Journal of Herpetology | 2008

Two New Sympatric Species of Leaf-Toed Geckos (Gekkonidae: Phyllodactylus) from the Balsas Region of the Upper Marañon Valley, Peru

Pablo J. Venegas; Josiah H. Townsend; Claudia Koch; Wolfgang Böhme

Abstract Two new species of the genus Phyllodactylus are described based on material collected in the southern portion of Departamento de Amazonas, Peru. Both species are well differentiated from all other South American Phyllodactylus based on characteristics of their morphology. In the case of one species, its large adult size and lack of well-defined rows of strongly keeled scales differentiate it from other Phyllodactylus, whereas in the second species, the presence of an enlarged postanal scale is diagnostic. Both species were collected in the xeric Balsas region of the upper Marañon Valley, and exhibit some similarities to other assemblages of sympatric Phyllodactylus in South America. The Balsas region is an area of endemism that warrants further attention from systematists and conservation biologists.


ZooKeys | 2011

A new bush anole (Iguanidae, Polychrotinae, Polychrus) from the upper Marañon basin, Peru, with a redescription of Polychrus peruvianus (Noble, 1924) and additional information on P. gutturosus Berthold, 1845

Claudia Koch; Pablo J. Venegas; Antonio García Bravo; Wolfgang Boehme

Abstract We herein describe a new colorful species of Polychrus with a conspicuous sexual dimorphism from the dry forest of the northern portion of Región de La Libertad, Peru. The new species differs from all other Polychrus species, in that this species has very small dorsal scales and thus a higher number of scales around midbody and in the middorsal line from behind the occipital scales to the level of the posterior edge of the thigh. Furthermore, we redescribe Polychrus peruvianus whose original description is short and lacks information on intraspecific variation and sexual dimorphism. Also, we add some information on intraspecific variation and ecology of Polychrus gutturosus. Finally, we synonymize Polychrus spurrelli Boulenger with Polychrus gutturosus.


Zootaxa | 2015

Three new endemic species of Epictia Gray, 1845 (Serpentes: Leptotyphlopidae) from the dry forest of northwestern Peru

Claudia Koch; Pablo J. Venegas; Wolfgang Böhme

Three new blind snake species of the genus Epictia are described based on material collected in the Peruvian Regions Amazonas, Cajamarca and La Libertad. All three species are well differentiated from all congeners based on characteristics of their morphology and coloration. They share 10 scale rows around the middle of the tail and possess two supralabials with the anterior one in broad contact with the supraocular. Epictia septemlineata sp. nov. has 16 subcaudal scales, 257 mid-dorsal scale rows, a yellowish-white rostral, and a black terminal spine. Epictia vanwallachi sp. nov. exhibits 16 subcaudals, 188 mid-dorsal scale rows, a grayish-brown rostral, and a yellow terminal spine. Epictia antoniogarciai sp. nov. features 14-18 subcaudals, 195-208 mid-dorsal scale rows, a bright yellow or yellowish-white rostral, and the terminal spine and terminal portion of the tail yellow. All three species were collected in the interandean dry forest valleys of the Marañón River and its tributaries. This region is an area of endemism and warrants further attention from systematic and conservation biologists.


Zootaxa | 2018

Annotated checklist and key to the species of amphibians and reptiles inhabiting the northern Peruvian dry forest along the Andean valley of the Marañón River and its tributaries

Claudia Koch; Pablo J. Venegas; Roy Santa Cruz; Wolfgang Böhme

A checklist of the amphibians and reptiles of 35 localities situated in the northern Peruvian dry forest valley of the Marañón River and its tributaries, containing 14 species of amphibians and 54 species of reptiles, is provided from data collected between July 2005 and April 2014 during several herpetological surveys and from the literature. Detailed accounts are given for each collected species containing morphometric and scalation data, information on natural history, comments regarding their distribution, the conservation status and key literature. Eleven new species were discovered and described during the survey period. At least five additional taxa might also represent new species but more field work and data collection are necessary to determine their status. For two snake species we provide the first country record and for 23 further species new departamental records are provided.


Archive | 2018

BONN: Zoologisches Forschungsmuseum Alexander Koenig in Bonn: Transformation of a Classical Natural History Museum of the Nineteenth Century into a Biodiversity Research Institution

Jonas J. Astrin; Sabine Heine; Claudia Koch; Dennis Rödder; Till Töpfer; J. Wolfgang Wägele

Natural history museums have their origin in times when scientists started to explore unknown landscapes where they collected specimens for scientific study and to demonstrat the general public the wonders of our world. Researchers usually were also hunters and gatherers. The “Zoologisches Forschungsmuseum Alexander Koenig” in Bonn was built on this tradition by a wealthy naturalist at the end of the nineteenth century. Today, this institute has a very different profile. It is a research institute with a focus on biodiversity studies at species level, with a strong taxonomic tradition and a special expertise in molecular studies that are relevant for phylogenetic inference, population genetics, speciation research, and molecular taxonomy. A major challenge for the future is to bridge the gap between knowledge about species taxonomy and biology and the application of this knowledge in ecological research and in applied conservation biology.


Zootaxa | 2017

Rediscovery of the type series of the Sacred Shrew, Sorex religiosus I. Geoffroy Saint-Hilaire, 1826, with additional notes on mummified shrews of ancient Egypt (Mammalia: Soricidae)

Neal Woodman; Claudia Koch; Rainer Hutterer

In 1826, Isidore Geoffroy Saint-Hilaire described the Sacred Shrew, Sorex religiosus [= Crocidura religiosa] from a series of 22 embalmed individuals that comprised a portion of the Italian archeologist Joseph Passalacquas collection of Egyptian antiquities from an ancient necropolis near Thebes, central Egypt. Living members of the species were not discovered until the beginning of the 20th century and are currently restricted to the Nile Delta region, well north of the type locality. In 1968, the type series of S. religiosus was reported lost, and in 1978, a neotype was designated from among a small collection of modern specimens in the Natural History Museum, London. Our investigations have revealed, however, that the type series is still extant. Most of the specimens used by I. Geoffroy Saint-Hilaire to describe S. religiosus still form part of the Passalacqua Collection in the Ägyptisches Museum, Berlin, Germany. We summarize the taxonomic history of S. religiosus, review the history of the Passalacqua collection, and explain why the type series was thought to have been lost. We designate an appropriate lectotype from among the original syntypes of S. religiosus in the Ägyptisches Museum. Our examination of the shrew mummies in the Passalacqua collection also yielded a species previously unrecorded from either ancient or modern Egypt: Crocidura pasha Dollman, 1915. Its presence increases the number of soricid species embalmed in ancient Egypt to seven and provides additional evidence for a more diverse Egyptian shrew fauna in the archeological past. Finally, we provide details that will assist in better understanding the variety of mummification procedures used to preserve animals in ancient Egypt.


Zootaxa | 2016

A new species of iguanid lizard, genus Stenocercus (Squamata, Iguania), from the Central Andes in Peru

Pablo J. Venegas; Lourdes Y. Echevarría; Karla García-Burneo; Claudia Koch

We describe a new species of Stenocercus from the montane forest of the right margin of the Marañón river in the northern portion of the Central Andes in northern Peru (Amazonas and La Libertad departments), at elevations ranging from 2300 to 3035 m. Stenocercus omari sp. nov. differs from other Stenocercus species, with the exception of S. amydrorhytus, S. chrysopygus, S. cupreus, S. johaberfellneri, S. latebrosus, S. melanopygus, S. modestus, S. ornatissimus, S. orientalis, and S. stigmosus, by having granular scales on the posterior surfaces of thighs, a conspicuous antehumeral fold and by lacking a vertebral crest. However, Stenocercus omari sp. nov. is easily distinguished from the aforementioned species, except S. orientalis, by the presence of prominently keeled dorsal head scales. The new species differs from S. orientalis by lacking a prominent oblique neck fold and by having a distinct deep postfemoral mite pocket.


Zootaxa | 2016

Two new endemic species of Epictia Gray, 1845 (Serpentes: Leptotyphlopidae) from Northern Peru

Claudia Koch; Roy Santa Cruz; Heidy Cárdenas

Herein, we describe two new thread snake species of the genus Epictia from elevations higher than 2000 meters above sea level in the Andes of the Cajamarca Region in Northern Peru. Both species share 10 midtail scale rows, a broad contact between the anterior supralabial and the supraocular scales in most of the specimens, and a yellow spot on the snout and the terminal part of the tail. Epictia venegasi sp. nov. is described on the basis of nine specimens and can further be differentiated from its congeners by having 211-221 mid-dorsal scale rows and a color pattern where each body scale is black on the anterior half and yellow on the posterior half. The description of Epictia vonmayi sp. nov. is based on two specimens which can further be differentiated from their congeners by having 196-205 mid-dorsal scale rows and 14 distinct black longitudinal stripes around the body, which run through the center of each scale and are separated by bright yellow interspaces; accordingly the tail exhibits 10 black longitudinal stripes which likewise run through the center of each scale.


Zootaxa | 2016

Applying n-dimensional hypervolumes for species delimitation: unexpected molecular, morphological, and ecological diversity in the Leaf-Toed Gecko Phyllodactylus reissii Peters, 1862 (Squamata: Phyllodactylidae) from northern Peru

Claudia Koch; Morris Flecks; Pablo J. Venegas; Patrick Bialke; Sebastian Valverde; Dennis Rödder

An integrative taxonomic approach based on morphology, molecular analyses, and climatic niche modeling was used to uncover cryptic diversity in the phyllodactylid gecko species Phyllodactylus reissii. At least three distinct species could be identified among the examined specimens from southern Ecuador and northern Peru. Phyllodactylus magister, described by Noble (1924) from arid Andean valleys of the Chinchipe and Marañón rivers in the Peruvian Department of Cajamarca and synonymized with P. reissii by Dixon & Huey (1970) is elevated from synonymy and a detailed redescription is provided. A new species of the genus Phyllodactylus from the Andean dry forest of the southern Marañón valley is identified and described herein. Phyllodactylus pachamama sp. nov. is differentiated from other South American congeners on the basis of mtDNA sequence divergence, morphological characters, and differences in the realized climatic niche. At least in Peru, P. reissii seems to primarily inhabit the northern coastal region west of the Andes, while the inter-Andean area along the Río Marañón and its tributaries seems to be inhabited mostly by other species of the genus, which are endemic to this area. The Andean valleys are underestimated in terms of biodiversity and lack thorough investigation and conservation actions.


Zootaxa | 2013

Two new endemic species of Ameiva (Squamata: Teiidae) from the dry forest of northwestern Peru and additional information on Ameiva concolor Ruthven, 1924

Claudia Koch; Pablo J. Venegas; Dennis Rödder; Morris Flecks; Wolfgang Böhme

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Pablo J. Venegas

Pontificia Universidad Católica del Ecuador

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Neal Woodman

National Museum of Natural History

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Omar Torres-Carvajal

National Museum of Natural History

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Sebastian Valverde

Pontificia Universidad Católica del Ecuador

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Lourdes Y. Echevarría

Pontifícia Universidade Católica do Rio Grande do Sul

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