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Dive into the research topics where Sebastian Lotzkat is active.

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Featured researches published by Sebastian Lotzkat.


ZooKeys | 2012

A new golden frog species of the genus Diasporus (Amphibia, Eleutherodactylidae) from the Cordillera Central, western Panama

Andreas Hertz; Frank Hauenschild; Sebastian Lotzkat; Gunther Köhler

Abstract We describe the frog species Diasporus citrinobapheus sp. n. from the Cordillera Central of western Panama. The new species differs from all other species in its genus in coloration, disk cover and disk pad shape, skin texture, advertisement call, and size. It is most similar to Diasporus tigrillo, from which it differs in dorsal skin texture, relative tibia length, number of vomerine teeth, ventral coloration, dorsal markings, and relative tympanum size, and to Diasporus gularis, from which it can be distinguished by the lack of membranes between the toes, adult size, posterior thigh coloration, and position of the choanae. We provide data on morpho- logy, vocalization, and distribution of the new species, as well as brief information on its natural history.


Zootaxa | 2014

Two new fringe-limbed frogs of the genus Ecnomiohyla (Anura: Hylidae) from Panama

Abel Batista; Andreas Hertz; Konrad Mebert; Gunther Köhler; Sebastian Lotzkat; Marcos Ponce; Milan Vesely

Forest canopy-dwelling frogs are usually among the rarest anuran species observed in the neotropical forest, mainly because they fall outside of the scope of the standard search methods used by herpetologists. During field explorations undertaken in western and eastern Panama in recent years, we discovered two species belonging to the genus Ecnomiohyla, which showed significant differences in genetic distances (16S mtDNA gene) and morphological characteristics different from any known Ecnomiohyla species. The first specimen originates from the Serranía de Jingurudó, Darién province, southeastern Panamá, and is described herein as E. bailarina sp. nov., and the second specimen was found at Santa Fe National Park, Veraguas province, central-western Panama, and is described as E. veraguensis sp. nov. We provide a detailed description of both new species, including comparisons of morphological and molecular characters of almost all members of the genus in lower Central America, as well as an identification key for the entire genus.


Herpetologica | 2010

A NEW SPECIES OF SIBON (SQUAMATA: COLUBRIDAE) FROM WESTERN PANAMA

Gunther Köhler; Sebastian Lotzkat; Andreas Hertz

Abstract We describe a new species of Sibon from the Reserva Forestal La Fortuna, Chiriquí Province, Panama. The new species is distinguished from all species presently assigned to Sibon by having 17 rows of dorsal scales at midbody and 15 rows one head length anterior to cloaca (vs. 13 or 15 rows of dorsal scales at midbody without reduction on posterior portion of body in all other species of Sibon), and dorsal scale rows that change orientation from the sides of body toward middorsum (vs. maintaining more or less the same orientation). A key to the Lower Central American species of Sibon is provided.


Zootaxa | 2012

Evidence For The Recognition Of Two Species Of Anolis Formerly Referred To As A. Tropidogaster (Squamata: Dactyloidae)

Gunther Köhler; Abel Batista; Milan Vesely; Marcos Ponce; Arcadio Carrizo; Sebastian Lotzkat

Based on differences in hemipenial morphology, male dewlap coloration, pholidosis, and 16S mtDNA, we recognize two species of anoles related to what was formerly referred to as Anolis tropidogaster: Anolis tropidogaster Hallowell 1856 and A. gaigei Ruthven 1916. The hemipenis in A. tropidogaster is large, bulbous, and bilobed whereas it is small, thin, and unilobed in A. gaigei; the male dewlap is almost uniform purplish red, sometimes with a paler orange central area in A. tropidogaster versus orange yellow with a darker orange central area in A. gaigei; and—aside from more subtle differences in several pholidotic characteristics—in male A. gaigei there is a pair of greatly enlarged postcloacal scales which is absent in A. tropidogaster. In the western part of its geographic range, A. gaigei has been confused with another anole species, A. polylepis Peters 1873, from which it can be readily distinguished by its strongly keeled ventral scales (smooth in A. polylepis).


Zootaxa | 2015

A new species of Dactyloa from eastern Panama, with comments on other Dactyloa species present in the region

Abel Batista; Milan Vesely; Konrad Mebert; Sebastian Lotzkat; Gunther Köhler

Giant anoles of the genus Dactyloa have been considered to be represented in eastern Panama by six species. In this contribution, we describe a seventh species that is restricted to the Majé, San Blas, Darién, and Piedras-Pacora mountain ranges. The new species resembles D. ibanezi, D. limon, and D. purpurescens in external morphology but differs from these species in dewlap coloration, dorsal color pattern, morphometrics, and scalation. The recognition of the new species is further supported by DNA barcoding (genetic distances >2.7% in 16S and >7.8% in COI between the new species and all other species of Dactyloa). We discuss the taxonomic identity of D. purpurescens, and, based on morphological evidence, we place D. chocorum in the synonymy of the former species. An identification key for all 11 Dactyloa species occurring in Panama is provided.


Zootaxa | 2015

Revision of the genus Lepidoblepharis (Reptilia: Squamata: Sphaerodactylidae) in Central America, with the description of three new species

Abel Batista; Marcos Ponce; Milan Vesely; Konrad Mebert; Andreas Hertz; Gunther Köhler; Arcadio Carrizo; Sebastian Lotzkat

Based on morphological and molecular data, we describe three new species of the genus Lepidoblepharis with granular dorsals from Panama (Lepidoblepharis emberawoundule sp. nov., Lepidoblepharis rufigularis sp. nov., and Lepidoblepharis victormartinezi sp. nov.). The results of our molecular analyses confirm the existence of five deeply differentiated genealogical lineages among Panamanian Lepidoblepharis. We present detailed descriptions of their morphology, including some new valuable scalation characters (ventral and subfemoral escutcheon) and hemipenes, as well as comparisons with the other two species of the genus known to occur in Panama (L. sanctaemartae and L. xanthostigma) and their South American congeners. Last, we provide an updated identification key for the genus Lepidoblepharis in Central America.


Check List | 2007

Amphibia, Anura, Hylidae, Hylomantis medinai: distribution extension by discovery of a third population

Sebastian Lotzkat; Andreas Hertz; Javier Valera-Leal

has not been detected again in Rancho Grande since 1974, and in spite of greatest search efforts carried out by Manzanilla et al. (1995) and Manzanilla (2001) as well as in the time between Januaries of 2005 and 2007 (Javier Valera-Leal, unpublished data) in PNHP between 400 - 1200 m a.s.l., new individuals have not been found neither in the type locality nor in its vicinity.


Check List | 2013

Distribution extension for Anolis salvini Boulenger, 1885 (Reptilia: Squamata: Dactyloidae), in western Panama

Joe-Felix Bienentreu; Andreas Hertz; Gunther Köhler; Sebastian Lotzkat

We report new localities for the lizard Anolis salvini Boulenger, 1885, along the Pacific slopes of the Cordillera Central in Chiriqui province and the Comarca Ngobe-Bugle of western Panama. These records extend the known geographic distribution of this species about 70 km eastwards. They also extend the known vertical distribution approximately 70 m uphill. Additionally, we provide the first record for the Caribbean slopes, an updated distribution map, photos of specimens from different localities, an analysis of a distress call, and comments on the morphology of this species.


Check List | 2012

Reptilia, Squamata, Gymnophthalmidae, Potamites apodemus (Uzzell, 1966): distribution extension and first records from Panama

Sebastian Lotzkat; Abel Batista; Joseph Vargas; Andreas Hertz; Gunther Köhler

Reporting on the southernmost locality in Costa Rica and the first two localities in Panama, we extend the known geographic distribution of the lizard Potamites apodemus (Uzzell, 1966) roughly 20 km eastwards, 40 km southwards, and 175 m in elevation. We provide photos of Panamanian specimens, comment on their morphology, and map the distribution of this unique species.


International Journal of Zoology | 2018

Cryptic Diversity in the Neotropical Gecko Genus Phyllopezus Peters, 1878 (Reptilia: Squamata: Phyllodactylidae): A New Species from Paraguay

Pier Cacciali; Sebastian Lotzkat; Tony Gamble; Gunther Köhler

The gecko genus Phyllopezus is distributed mainly along South America’s “Dry Diagonal” (Caatinga, Cerrado, and Chaco). The genus has been the subject of recent taxonomic analyses and includes four described species and seven candidate species referred to here as Phyllopezus pollicaris sensu lato. In Paraguay, Phyllopezus is known from the Chaco and Cerrado where it is abundant, and also from a small isolated population from a rocky hill formation named “Cordillera de Los Altos” (Los Altos mountain range). Here we analyzed genetic samples from across its range, including new samples from Paraguay, using DNA barcoding analysis of the mitochondrial 16S gene and phylogenetic analyses using both Bayesian and Maximum Likelihood methods. We found genetic and morphological differences among geckos from the Los Altos mountain range and the remaining Phyllopezus populations. Using both molecular and morphological evidence we describe a new Phyllopezus species, sister to P. przewalskii. Genetic differentiation among described and putative Phyllopezus species is greater than their morphological differences, which likely accounts for these cryptic taxa remaining undescribed for so long.

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Andreas Hertz

Goethe University Frankfurt

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Gunther Köhler

Goethe University Frankfurt

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Abel Batista

Universidad Autónoma de Chiriquí

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Pier Cacciali

Goethe University Frankfurt

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